Kenworth Diagnostic Trouble Codes

DTC

Input Received By

Item / System

Description

Detailed Description

1603

Chassis Node

Fuel Filter Restriction

Open in fuel filter restriction circuit

This DTC will be recorded when the control unit sees an

open or short to ground at the fuel filter restriction sensor

input. Some possible causes for this are a broken wire,

corroded or disconnected connector, or sensor failure.

1604

Chassis Node

Fuel Filter Restriction

Short in fuel filter restriction circuit

This DTC will be recorded when the control unit sees

a short to +5V at the fuel filter restriction sensor input.

Some possible causes for this are a pinched wire, water

in a connector, or sensor failure.

7503

Front Steer Axle Oil

Temp

Open in front steer axle oil temp circuit

This DTC will be recorded when the control unit sees an

open at the front steer drive axle oil temperature sensor

input. Some possible causes for this are a broken wire,

corroded or disconnected connector, or sensor failure.

7504

Front Steer Axle Oil

Temp

Short in front steer axle oil temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the front steer axle oil temperature

sensor input. Some possible causes for this are a pinched

wire, water in a connector, or sensor failure.

7703

Chassis Node

Rear Drive Oil Temp

Open in rear drive axle oil temp circuit

This DTC will be recorded when the control unit sees an

open at the rear drive axle oil temperature sensor input.

Some possible causes for this are a broken wire, corroded

or disconnected connector, or sensor failure.

7704

Chassis Node

Rear Drive Oil Temp

Short in rear drive axle oil temp circuit

This DTC will be recorded when the control unit sees

a short to ground at the rear drive axle oil temperature

sensor input. Some possible causes for this are a pinched

wire, water in a connector, or sensor failure.

7803

Chassis Node

Center/Steer axle Oil

Temp

Open in center drive axle oil temp circuit

This DTC will be recorded when the control unit sees an

open at the center drive axle oil temperature sensor input.

Some possible causes for this are a broken wire, corroded

or disconnected connector, or sensor failure.

7804

Chassis Node

Center/Steer axle Oil

Temp

Short in center drive axle oil temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the center drive axle oil temperature

sensor input. Some possible causes for this are a pinched

wire, water in a connector, or sensor failure.

DTC

Input Received By

Item / System

Description

Detailed Description

8409

CECU

Wheel-Based Vehicle

Speed Message

Wheel based vehicle speed

message missing

This DTC will be recorded when the control unit does

not see the Wheel Based Vehicle Speed message from

the engine, or when the message has timed out. Some

possible causes for this include faulty wiring to the engine

controller, incorrect engine programming or a faulty

engine controller.

9003

Chassis Node

PTO Oil Temp

Open in PTO oil temp circuit

This DTC will be recorded when the control unit sees

an open at the PTO oil temperature sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure.

9004

Chassis Node

PTO Oil Temp

Open in PTO oil temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the PTO oil temperature sensor input.

Some possible causes for this are a pinched wire, water

in a connector, or sensor failure.

9109

CECU

Accelerator Pedal

Position Message

Accelerator pedal position

message missing

This DTC will be recorded when the control unit does not

see the Accelerator Pedal Position Speed message from

the engine, or when the message has timed out. Some

possible causes for this include faulty data link wiring to

the engine controller, incorrect engine programming or a

faulty engine controller.

10703

CECU

Air Filter Restriction

Open in air filter restriction circuit

This DTC will be recorded when the control unit sees

an open at the air filter restriction sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure.

10704

CECU

Air Filter Restriction

Short in air filter restriction circuit

This DTC will be recorded when the control unit sees a

short to +5V at the air filter restriction sensor input. Some

possible causes for this are a pinched wire, water in a

connector, or sensor failure.

11603

CECU

Application Air

Pressure

Open in application air pressure

circuit

This DTC will be recorded when the control unit sees an

open or short to ground at the tractor brake application

air pressure sensor input. Some possible causes for this

are a broken wire, corroded or disconnected connector,

or sensor failure.

11604

CECU

Application Air

Pressure

Short in application air pressure

circuit

This DTC will be recorded when the control unit sees a

short to +5V at the tractor brake application air pressure

sensor input. Some possible causes for this are a pinched

wire, water in a connector, or sensor failure.

11703

CECU

Primary Air Pressure

Open in primary air pressure circuit

This DTC will be recorded when the control unit sees an

open or short to ground at the primary air pressure sensor

input. Some possible causes for this are a broken wire,

corroded or disconnected connector, or sensor failure.

11704

CECU

Primary Air Pressure

Short in primary air pressure circuit

This DTC will be recorded when the control unit sees a

short to +5V at the primary air pressure sensor input.

Some possible causes for this are a pinched wire, water

in a connector, or sensor failure.

11803

CECU

Secondary Air

Pressure

Open in secondary air pressure

circuit

This DTC will be recorded when the control unit sees an

open or short to ground at the secondary air pressure

sensor input. Some possible causes for this are a broken

wire, corroded or disconnected connector, or sensor failure.

11804

CECU

Secondary Air

Pressure

Short in secondary air pressure

circuit

This DTC will be recorded when the control unit sees a

short to +5V at the secondary air pressure sensor input.

Some possible causes for this are a pinched wire, water

in a connector, or sensor failure.

15802

CECU

Ignition Power

Ignition Power is in an

indeterminate state

This DTC will be recorded when the control unit sees

between 33% and 66% of battery voltage on the ignition

pin. A possible cause for this is faulty ignition sense

wiring. The ignition sense wire comes from the power

distribution box to the control unit behind the cup holder.

This sense wire is also used for other control units such

as the door modules and cluster. The wiring to those

control units may be the issue.

15803

CECU

Ignition Power

12V is on control unit ignition pin

but not on cluster ignition pin

This DTC will be recorded when the control unit sees 12V

on control unit ignition pin but not on cluster ignition pin.

Some possible causes for this are a broken wire, corroded

or disconnected connector. Ignition power is supplied to

the cluster from the power distribution box near the drivers

left foot through the IP harness to the cluster.

15804

CECU

Ignition Power

12V is on cluster ignition pin but

not on control unit ignition pin

This DTC will be recorded when the control unit sees 12V

on cluster ignition pin but not on control unit ignition pin.

Some possible causes for this are a broken wire, corroded

or disconnected connector. Ignition power is supplied to

the control unit from the power distribution box near the

drivers left foot through the IP harness to the control unit

behind the cup holder.

16800

CECU

Control Unit Battery

Voltage

Over voltage

The control unit continually monitors the voltage it is

supplied. If the voltage is above 16.5 volts the system will

record this fault. Some possible causes for this fault are

faulty alternator, or jump starting with to high of voltage.

Power is supplied from the power distribution box near

the drivers left foot through the IP harness to the control

unit behind the cup holder.

16801

CECU

Control Unit Battery

Voltage

Under voltage for more than 10

minutes

The control unit continually monitors the voltage it is

supplied. If the voltage is below 8.4 volts for 10 minutes

the system will record this fault. Some possible causes for

this fault are low batteries, too much system load, faulty

alternator, or corroded connectors. Power is supplied for

the power distribution box near the drivers left foot through

the IP harness to the control unit behind the cup holder.

17102

CECU

Outside Air Temp

Outside air temp message from

engine error

This DTC will be recorded when the CAN signal for the

outside air temperature sensor from the engine is in the

invalid range. Some possible causes for this are broken

wire or sensor failure.

Modifying the sensor or its location can impact vehicle

performance, emissions, and/or reliability.

17103

CECU

Outside Air Temp

Open in outside air temp circuit

This DTC will be recorded when the control unit sees an

open at the outside air temperature sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure.

DTC

Input Received By

Item / System

Description

Detailed Description

17104

CECU

Outside Air Temp

Short in outside air temp circuit

This DTC will be recorded when the control unit sees

a short to ground at the outside air temperature sensor

input. Some possible causes for this are a pinched wire,

water in a connector, or sensor failure.

17303

CECU

Exhaust Temp

Open in exhaust temp circuit

This DTC will be recorded when the control unit sees

an open at the exhaust temp sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure.

17304

CECU

Exhaust Temp

Short in exhaust temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the exhaust temp sensor input. Some

possible causes for this are a pinched wire, water in a

connector, or sensor failure.

17703

CECU

Transmission Oil Temp

Open in transmission oil temp circuit

This DTC will be recorded when the control unit sees an

open at the transmission oil temperature sensor input.

Some possible causes for this are a broken wire, corroded

or disconnected connector, or sensor failure.

17704

CECU

Transmission Oil Temp

Short in transmission oil temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the transmission oil temperature sensor

input. Some possible causes for this are a pinched wire,

water in a connector, or sensor failure.

18409

CECU

Instantaneous Fuel

Economy message

Short in transmission oil temp circuit

This DTC will be recorded when the control unit does

not see the Instantaneous Fuel Economy message from

the engine, or when the message has timed out. Some

possible causes for this include faulty wiring to the engine

controller or a faulty/misconfigured engine controller.

19009

CECU

Engine Speed

Message

Engine speed message missing

This DTC will be recorded when the control unit does

not see the Engine Speed message from the engine, or

when the message has timed out. Some possible causes

for this include faulty wiring to the engine controller or a

faulty/misconfigured engine controller.

23731

CECU

Engine VIN

VIN mismatched

This DTC will be recorded when the control unit sees a

mismatch between the VIN from the engine and the VIN

stored in the control unit.

24510

CECU

Offset of Odometer

Odometer offset has been recalculated

The instrumentation system continually calculates the

odometer reading using information from the engine

ECU. It stores the offset between the engine ECU and

instrumentation system. This offset is recalculated if the

engine ECU or the control unit are replaced. This DTC will

appear when the offset is recalculated.

24709

CECU

Engine Total Hours of

Operation

Engine total hours of operation

message missing

This DTC will be recorded when the control unit does not

see the Engine Total Hours of Operation message from

the engine, or when the message has timed out. Some

possible causes for this include faulty data bus wiring to

the engine controller or a faulty/misconfigured engine

controller.

24809

CECU

Total Power Takeoff

Hours

Total power takeoff hours message

missing

This DTC will be recorded when the control unit does

not see the Total Power Takeoff Hours message from

the engine, or when the message has timed out. Some

possible causes for this include faulty data bus wiring to

the engine controller or a faulty/misconfigured engine

controller.

44103

Chassis Node

General Temp

Open in general oil temp circuit

This DTC will be recorded when the control unit sees an

open at the general oil temperature sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure. The wiring

for this sensor runs from the chassis node through the

chassis and IP harnesses to a connector behind the right

hand gauge panel.

44104

Chassis Node

General Temp

Short in general oil temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the general temperature sensor input.

Some possible causes for this are a pinched wire, water in

a connector, or sensor failure. The wiring for this sensor

runs from the chassis node through the chassis and IP

harnesses to a connector behind the right hand gauge

panel.

44203

Chassis Node

Aux Transmission

Temp

Open in aux transmission temp

circuit

This DTC will be recorded when the control unit sees an

open at the auxiliary transmission oil temperature sensor

input. Some possible causes for this are a broken wire,

corroded or disconnected connector, or sensor failure.

44204

Chassis Node

Aux Transmission

Temp

Short in aux transmission temp

circuit

This DTC will be recorded when the control unit sees

a short to ground at the auxiliary transmission oil

temperature sensor input. Some possible causes for this

are a pinched wire, water in a connector, or sensor failure.

57803

Chassis Node

Forward Drive Oil

Temp

Open in forward drive axle oil temp

circuit

This DTC will be recorded when the control unit sees an

open at the forward drive axle oil temperature sensor

input. Some possible causes for this are a broken wire,

corroded or disconnected connector, or sensor failure.

57804

Chassis Node

Forward Drive Oil

Temp

Short in forward drive axle oil temp

circuit

This DTC will be recorded when the control unit sees a

short to ground at the forward drive axle oil temperature

sensor input. Some possible causes for this are a pinched

wire, water in a connector, or sensor failure.

59631

Cruise Control

Cruise control rationality check

This DTC will be recorded when the driver attempts to set

the SET or RESUME before he has touched the brake

and the clutch. This fault will remain active until the

keyswitch is cycled.

59902

Cruise Control

Invalid input from cruise control set

switch

This DTC will be recorded when the control unit sees

an invalid voltage range from the cruise control set

switch. Some possible causes for this are an intermittent

connection at the switch, corroded or broken wire or bad

switch.

59631

Cruise Control

Invalid input from cruise control

resume switch

This DTC will be recorded when the control unit sees

an invalid voltage range from the cruise control resume

switch. Some possible causes for this are an intermittent

connection at the switch, corroded or broken wire or bad

switch.

DTC

Input Received By

Item / System

Description

Detailed Description

67805

CECU

CVSG / MCS Supply

CVSG / MCS supply open load

This DTC will be recorded when the control unit sees an

open load on the power supply to the CVSG bus and the

Menu Control Switch. A possible cause of this failure is a

broken wire leading to the 2" gauges. A common symptom

of this fault is that none of the 2" gauges are working.

67806

CECU

CVSG / MCS Supply

CVSG / MCS supply shorted to

ground

This DTC will be recorded when the sees a short to ground

on the CVSG supply. Some possible causes for this are a

pinched wire, bent pins on a CVSG or a failed CVSG.

80404

CECU

ABS Mode

“Tractor ABS Not Installed” input

is shorted and ABS system is

present.

This DTC will be recorded when the control unit “ABS

Installed” parameter is disabled and it is receiving

messages from an ABS system on V-CAN. If the vehicle

is to be equipped with ABS enable the “ABS Installed”

parameter. If the vehicle is not to be equipped with ABS

remove the ABS control unit.

70104

CECU

Electric Over Air

Electric over air switch 1 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 1 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70204

CECU

Electric Over Air

Electric over air switch 2 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 2 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70304

CECU

Electric Over Air

Electric over air switch 3 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 3 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70404

CECU

Electric Over Air

Electric over air switch 4 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 4 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70504

CECU

Electric Over Air

Electric over air switch 5 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 5 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70604

CECU

Electric Over Air

Electric over air switch 6 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 6 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70704

CECU

Electric Over Air

Electric over air switch 7 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 7 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

70804

CECU

Electric Over Air

Electric over air switch 8 short to

ground

This DTC will be recorded when the control unit sees

a short to ground at the electric over air switch 8 input.

Some possible causes for this are a pinched wire, water

in a connector, or switch failure.

82903

Chassis Node

Primary Fuel

Open in primary fuel level circuit

This DTC will be recorded when the control unit sees

an open at the primary fuel level sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure.

82904

Chassis Node

Primary Fuel

Short in primary fuel level circuit

This DTC will be recorded when the control unit sees a

short to ground at the primary fuel level sensor input.

Some possible causes for this are a pinched wire, water

in a connector, or sensor failure.

83003

Chassis Node

Secondary Fuel

Open in secondary fuel level circuit

This DTC will be recorded when the control unit sees

an open at the secondary fuel level sensor input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or sensor failure.

83004

Chassis Node

Secondary Fuel

Short in secondary fuel level circuit

This DTC will be recorded when the control unit sees a

short to ground at the secondary fuel level sensor input.

Some possible causes for this are a pinched wire, water

in a connector, or sensor failure.

88609

Adaptive Cruise

Control unit cannot read messages

from adaptive cruise on V-CAN

This DTC will be recorded when the control unit cannot

read messages from the Adaptive Cruise ECU. Some

possible causes for this are a broken wire, corroded or

disconnected connector, no terminating resistors, no

power to the Adaptive Cruise ECU or Adaptive Cruise

ECU failure.

91709

CECU

High Resolution

Vehicle Distance

Message

High resolution vehicle distance

message missing

This DTC will be recorded when the control unit does not

see the High Resolution Vehicle Distance message from

the engine, or when the message has timed out. Some

possible causes for this include faulty data bus wiring to

the engine controller or a faulty engine controller.

97403

Chassis Node

Remote Accelerator

Open in remote accelerator circuit

This DTC will be recorded when the control unit

sees an open at the remote accelerator input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or throttle controller failure.

97404

Chassis Node

Remote Accelerator

Short in remote accelerator circuit

This DTC will be recorded when the control unit sees a

short to ground at the remote accelerator input. Some

possible causes for this are a pinched wire, water in a

connector, or throttle controller failure.

102809

CECU

Total Engine PTO Fuel

Used Message

Total engine PTO fuel used

message missing

This DTC will be recorded when the control unit does

not see the Total Engine PTO Fuel Used message from

the engine, or when the message has timed out. Some

possible causes for this include faulty data bus wiring to

the engine controller or a faulty/misconfigured engine

controller.

123109

CECU

I-CAN

Control Unit cannot read messages

from cluster on I-CAN

This DTC will be recorded when the control unit cannot

read messages from the cluster. Some possible causes

for this are a broken wire, corroded or disconnected

connector, no power to the cluster or cluster failure.

138703

CECU

Brake Saver Oil Temp

Open in brake saver oil temp circuit

This DTC will be recorded when the control unit sees an

open at the brake saver oil temperature sensor input.

Some possible causes for this are a broken wire, corroded

or disconnected connector, or sensor failure.

138704

CECU

Brake Saver Oil Temp

Short in brake saver oil temp circuit

This DTC will be recorded when the control unit sees a

short to ground at the brake saver oil temperature sensor

input. Some possible causes for this are a pinched wire,

water in a connector, or sensor failure.

DTC

Input Received By

Item / System

Description

Detailed Description

138803

Chassis Node

Transfer Case Oil

Temp

Open in transfer case oil temp

circuit

This DTC will be recorded when the control unit sees an

open at the transfer case oil temperature sensor input.

Some possible causes for this are a broken wire, corroded

or disconnected connector, or sensor failure.

138804

Chassis Node

Transfer Case Oil

Temp

Open in transfer case oil temp

circuit

This DTC will be recorded when the control unit sees a

short to ground at the transfer case oil temperature sensor

input. Some possible causes for this are a pinched wire,

water in a connector, or sensor failure.

148109

CECU

V-CAN

Control unit cannot read messages

from ABS on V-CAN

This DTC will be recorded when the control unit

cannot read messages from the ABS system. Some

possible causes for this are a broken wire, corroded or

disconnected connector, no terminating resistors, no

power to the ABS system or ABS ECU failure.

148209

CECU

V-CAN

Control Unit cannot read messages

from Transmission on V-CAN

This DTC will be recorded when the control unit cannot

read messages from the transmission ECU. Some

possible causes for this are a broken wire, corroded or

disconnected connector, no terminating resistors, no

power to the Transmission or Transmission ECU failure.

148309

CECU

V-CAN

Control Unit cannot read messages

from Engine on V-CAN

This DTC will be recorded when the control unit

cannot read messages from the engine ECU. Some

possible causes for this are a broken wire, corroded or

disconnected connector, no terminating resistors, no

power to the engine or engine ECU failure.

148702

CECU

Dash Light Dimmer

Dimmer invalid range

This is caused by the Dimmer Up or Dimmer Down wires

reporting invalid voltage.

Check the switch and wiring for damage

148703

CECU

Dash Light Dimmer

Open in dash dimmer input circuit

This DTC will be recorded when the control unit sees

an open at the dash light dimmer control input. Some

possible causes for this are a broken wire, corroded or

disconnected connector, or dimmer control failure.

148704

CECU

Dash Light Dimmer

Open in dash dimmer input circuit

This DTC will be recorded when the control unit sees a

short to ground at the dash light dimmer control input.

Some possible causes for this are a pinched wire, water

in a connector, or dimmer control failure.

148707

CECU

Dash Light Dimmer

Dimmer stuck

This is caused by either the Dimmer switch button being

stuck Up or Down for 20 seconds.

Check the switch and wiring for damage

149106

CECU

Dash Light Dimmer

Short in dash dimmer output #1

circuit

This DTC will be recorded when the sees a short to

ground on the #1 dimmer output. Some possible causes

for this are a pinched wire, water in a connector, or

dimmed component failure. This output controls dimming

to the left and right spare backlighting.

149206

CECU

Dash Light Dimmer

Short in dash dimmer output #2

circuit

This DTC will be recorded when the sees a short to

ground on the #2 dimmer output. Some possible causes

for this are a pinched wire, water in a connector, or

dimmed component failure. This output controls dimming

to much of the instrument illumination and backlighting.

167502

CECU

Starter Motor

Cool down Enforce

Starter disabled due to over crank

protection

This DTC will be recorded when the allowed cranking

time has been reached and the starter is disabled. This

DTC will go away and the starter will be re-enabled after

15 minutes.

176102

CECU

Diesel Exhaust Fluid

Diesel exhaust fluid level message

error

This DTC will be recorded when the control unit receives

an invalid range on the diesel exhaust fluid level message

from the engine ECU or does not receive the message in

a timely manner.

176109

Diesel Exhaust Fluid

Diesel exhaust fluid level message

error

This DTC will be recorded when the control unit receives

a Not Available signal on the diesel exhaust fluid level

message from the engine ECU or when the message has

timed out. Some possible causes for this include faulty

wiring to the engine controller or a faulty/misconfigured

engine controller.v

176119

Diesel Exhaust Fluid

Diesel exhaust fluid level message

error

This DTC will be recorded when the control unit receives

an invalid range on the diesel exhaust fluid level

message from the engine ECU. Some possible causes

for this include faulty wiring to the engine controller or a

faulty/misconfigured engine controller.

234801

234803

234805

234806

234813

234831

Chassis Node

Exterior Lighting - High

Beam

Left or right high beam output general error Left or right high beam output short to power Left or right high beam output

under current or open circuit Left or right high beam output over current Left or right high beam output general error

Left or right high beam output not

available

This set of DTCs will be recorded when there is a problem

with one of the High Beam circuits. This could be caused

by failed bulbs, wiring harness issues, or corroded

connectors.

Left high beam output from Pin 13 of the Chassis Node

connector A.

Right high beam output from Pin 7 of the Chassis Node

connector A.

235001

Chassis Node

Exterior Lighting - High

Beam

Left or right low beam output

general error

This set of DTCs will be recorded when there is a problem

with one of the Low Beam circuits. This could be caused

by failed bulbs, wiring harness issues, or corroded

connectors.

Left low beam output from Pin 1 of the Chassis Node

connector A.

Right low beam output from Pin 19 of the Chassis Node

connector A.

235003

Chassis Node

Exterior Lighting - High

Beam

Left or right low beam output short

to power

235005

Chassis Node

Exterior Lighting - High

Beam

Left or right low beam output under

current or open circuit

235006

Chassis Node

Exterior Lighting - High

Beam

Left or right low beam output over

current

235013

Chassis Node

Exterior Lighting - High

Beam

Left or right low beam output

general error

235031

Chassis Node

Exterior Lighting - High

Beam

Left or right low beam output not

available

236801

Chassis Node

Exterior Lighting - Left

Front Turn

Left front turn or left front side turn

output general error

This set of DTCs will be recorded when there is a problem

with one of the Left Front Turn circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

Left front turn output from Pin 4 of the Chassis Node

connector B.

236803

Left front turn or left front side turn

output short to power

236805

Left front turn or left front side turn

output under current or open circuit

236806

Left front turn or left front side turn

output over current

236813

Left front turn or left front side turn

output general error

236831

Left front turn or left front side turn

output not available

DTC

Input Received By

Item / System

Description

Detailed Description

237001

Chassis Node

Exterior Lighting - Right

Front Turn

Right front turn or left front side

turn output general error

This set of DTCs will be recorded when there is a problem

with one of the Right Front Turn circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

Right front turn output from Pin 7 of the Chassis Node

connector B.

237003

Right front turn or left front side

turn output short to power

237005

Right front turn or left front side

turn output under current or open

circuit

237006

Right front turn or left front side

turn output over current

237013

Right front turn or left front side

turn output general error

237031

Right front turn or left front side

turn output not available

237201

Chassis Node

Exterior Lighting - Tractor/Truck Left

Rear Turn/Stop

Left rear turn/stop output general

error

This set of DTCs will be recorded when there is a problem

with one of the Left Rear Turn/Stop circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

Tractor/Truck left rear turn/stop output from Pin 13 of the

Chassis Node connector B.

237203

Left rear turn/stop output short to

power

237205

Left rear turn/stop output under

current or open circuit

237206

Left rear turn/stop output over

current

237213

Left rear turn/stop output general

error

237231

Left rear turn/stop output not

available

237401

Chassis Node

Exterior Lighting - Tractor/Truck Right

Rear Turn/Stop

Right rear turn/stop output general

error

This set of DTCs will be recorded when there is a problem

with one of the Right Rear Turn/Stop circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

Tractor/Truck right rear turn/stop output from Pin 2 of the

Chassis Node connector B.

237403

Right rear turn/stop output short to

power

237405

Right rear turn/stop output under

current or open circuit

237406

Right rear turn/stop output over

current

237413

Right rear turn/stop output general

error

237431

Right rear turn/stop output general

error

237801

Chassis Node

Exterior Lighting -

Marker Lamp

Marker lamp output general error

This set of DTCs will be recorded when there is a problem

with one of the Marker Lamp circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

Marker lamp relay control output from Pin 10 of the

Chassis Node connector A.

237803

Marker lamp output short to power

237805

Marker lamp output under current

or open circuit

237806

Marker lamp output over current

237813

Marker lamp output general error

237831

Marker lamp output not available

DTC

Input Received By

Item / System

Description

Detailed Description

238201

CECU

Exterior Lighting -

Clearance Lamp

Clearance lamp output general error

This set of DTCs will be recorded when there is a problem

with one of the Clearance Lamp circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

238203

Clearance lamp output short to power

238205

Clearance lamp output under

current or open circuit

238206

Clearance lamp output over current

238213

Clearance lamp output general error

238231

Clearance lamp output not available

239001

Chassis Node

Exterior Lighting -

Secondary Fog Lamp

Secondary fog lamp output general error

This set of DTCs will be recorded when there is a problem

with one of the Secondary Fog Lamp circuit. This could be

caused by failed bulbs, wiring harness issues, or corroded

connectors.

Secondary fog lamp relay control output from Pin 18 of

the Chassis Node connector C.

239003

Secondary fog lamp output short to power

239005

Secondary fog lamp output under

current or open circuit

239006

Secondary fog lamp output over current

239013

Secondary fog lamp output general error

239031

Secondary fog lamp output not available

239102

Chassis Node

Invalid input from backup alarm

mute switch

This DTC will be recorded when the control unit sees

an invalid voltage range from the backup alarm mute

switch. Some possible causes for this are an intermittent

connection at the switch, corroded or broken wire or bad

switch.

239202

Chassis Node

Invalid input from reverse switch

This DTC will be recorded when the control unit sees

an invalid voltage range from the reverse switch. Some

possible causes for this are an intermittent connection at

the switch, corroded or broken wire or bad switch.

239601

Chassis Node

Exterior Lighting - Left

Chassis Node

Left trailer turn output general error

This set of DTCs will be recorded when there is a problem

with one of the Left Turn Trailer Lamp circuit. This could

be caused by failed bulbs, wiring harness issues, or

corroded connectors.

Left turn trailer output from Pin 16 of the Chassis Node

connector B.

239603

Left trailer turn output short to power

239605

Left trailer turn output under

current or open circuit

239606

Left trailer turn output over current

239613

Left trailer turn output general error

239631

Left trailer turn output not available

239801

CECU

Exterior Lighting -

Right Turn Trailer

Lamp

Right trailer turn output general error

This set of DTCs will be recorded when there is a problem

with one of the Right Turn Trailer Lamp circuit. This could

be caused by failed bulbs, wiring harness issues, or

corroded connectors.

Right turn trailer output from Pin 20 of the Chassis Node

connector C.

239803

Right trailer turn output short to power

239805

Right trailer turn output under

current or open circuit

239806

Right trailer turn output over current

239813

Right trailer turn output general

 error

239831

Right trailer turn output not available

240401

CECU

Park Lamps

Park lamp general error

This set of DTCs will be recorded when there is a wiring

problem between the Power distribution center and the

CECU connector E pin 7.

240403

Park lamp short to power

240405

Park lamp open circuit

240406

Park lamp short to ground

240413

Park lamp bad reference voltage

240431

Park lamp chassis node lathches

fault

DTC

Input Received By

Item / System

Description

Detailed Description

257903

CECU

Battery Current

Open in ammeter sensor circuit

This DTC will be recorded when the control unit sees an

open at the ammeter sensor input. Some possible causes

for this are a broken wire, corroded or disconnected

connector, or sensor failure.

257904

CECU

Battery Current

Short in ammeter sensor circuit

This DTC will be recorded when the control unit sees a

short at the ammeter sensor input. Some possible causes

for this are pinched wire, water in a connector, or sensor

failure.

265106

Dome Lamp

Dome lamp over current

This DTC will be recorded when the control unit sees

overcurrent on the dome lamp output circuit. Some

possible cause for this are a short to ground in the circuit,

a pinched wire or the wattage of the bulbs on in the circuit

are exceeding the output capacity.

286302

Wiper

Invalid range high speed wiper

switch input

This DTC will be recorded when the control unit sees

an invalid voltage range on the high speed wiper switch

input. Some possible causes are broken wire, corroded or

disconnected connector or faulty turn stalk switch.

286303

Wiper

Open in wiper relay output

This DTC will be recorded when the control unit sees an

open at the wiper output relay. Some possible causes

for this are a broken wire, corroded or disconnected

connector.

286304

Wiper

Short in wiper relay output

This DTC will be recorded when the control unit sees a

short to ground at the wiper output relay. Some possible

causes for this are a pinched wire or water in a connector.

286307

CECU

Wiper

Out of range on low speed wiper

switch input

This DTC will be recorded when the control unit sees

an out of range voltage value on the low speed wiper

switch. Some possible causes are broken wire, corroded

or disconnected connector or faulty turn stalk switch.

286602

Washer

Invalid range on washer pump

switch input

This DTC will be recorded when the control unit sees a

invalid range of washer pump switch input. Some possible

causes are broken wire, corroded or disconnected

connector or faulty turn stalk switch.

286603

Washer

Open in washer pump relay output

This DTC will be recorded when the control unit sees

an open at the washer pump output relay. Some

possible causes for this are a broken wire, corroded or

disconnected connector.

286604

Washer

Short in washer pump relay output

This DTC will be recorded when the control unit sees a

short to ground at the washer pump output relay. Some

possible causes for this are a pinched wire or water in

a connector.

286612

CECU

Washer Switch

Short in washer pump switch input

or input active for more than 15

seconds

This DTC will be recorded when the control unit sees

a washer pump switch input active for more than 15

seconds. The control unit determines that a washer

pump active for longer than 15 seconds may be a short

circuit. Some possible causes for this are a pinched wire,

corrosion or water in the connector or faulty turn stalk

switch.

287204

CECU

Flash to Pass Switch

Short in flash to pass switch input

or input active for more than 10

seconds

This DTC will be recorded when the control unit sees the

flash to pass switch active for more than 10 seconds.

The control unit determines that a Flash to Pass switch

input active for longer than 10 seconds may be a short

circuit. Some possible causes for this are a pinched wire,

corrosion or water in the connector or faulty turn stalk

switch.

287304

CECU

Marker Lamp Flash

Switch

Short in marker lamp flash switch

input or input active for more than

10 seconds

This DTC will be recorded when the control unit sees the

marker lamp flash switch input active for more than 10

seconds. The control unit determines that a marker lamp

flash switch input active for longer than 10 seconds may

be a short circuit. Some possible causes for this are a

pinched wire, corrosion or water in the connector or faulty

marker lamp flash switch.

DTC

Input Received By

Item / System

Description

Detailed Description

287404

CECU

High Beam Toggle

Switch

Short in high beam toggle switch

input or input active for more than

10 seconds

This DTC will be recorded when the control unit sees the

high beam toggle switch input active for more than 10

seconds. The control unit determines that a high beam

toggle switch input active for longer than 10 seconds may

be a short circuit. Some possible causes for this are a

pinched wire, corrosion or water in the connector or faulty

turn stalk switch.

287604

CECU

Turn Signal Switch

Short in turn signal switch

This DTC will be recorded when the control unit sees the

turn stalk input of a short circuit value (< 253Ω).

287607

CECU

Turn Signal Switch

Out of range - turn signal switch

This DTC will be recorded when the control unit sees the

turn stalk input in an invalid range (253Ω < Input < 270Ω

OR 580Ω < Input < 685Ω).

350905

CECU

CECU Power

CECU power input 1 fault

These two DTC's will be recorded when there is a wiring

or fuse problem for the CECU power, connector A pin 2.

351005

CECU

CECU Power

CECU power input 2 fault

These two DTC's will be recorded when there is a wiring

or fuse problem for the CECU power, connector A pin 2.

351105

MUX3-P Power

Chassis Node Power Input 1 Fault

Inspect wiring and fusing of Chassis Node Power pin A04

351131

MUX3-P Power

Chassis Node Power Input 1 Fault

Inspect wiring and fusing of Chassis Node Power pin A04

351205

MUX3-P Power

Chassis Node Power Input 2 Fault

Inspect wiring and fusing of Chassis Node Power pin A16

351231

MUX3-P Power

Chassis Node Power Input 2 Fault

Inspect wiring and fusing of Chassis Node Power pin A16

351305

MUX3-P Power

Chassis Node Power Input 3 Fault

Inspect wiring and fusing of Chassis Node Power pin B01

351331

MUX3-P Power

Chassis Node Power Input 3 Fault

Inspect wiring and fusing of Chassis Node Power pin B01

351405

MUX3-P Power

Chassis Node Power Input 4 Fault

Inspect wiring and fusing of Chassis Node Power pin B10

351431

MUX3-P Power

Chassis Node Power Input 4 Fault

Inspect wiring and fusing of Chassis Node Power pin B10

369602

Aftertreatment

Short in washer pump relay output

This DTC will be recorded when the control unit sees both

regeneration force and inhibit switches are active at the

same time for more than 0.5 sec. Some possible causes

for this are a broken regeneration switch on the dash or

wiring for these circuits short circuited together behind

the dash.

369709

Aftertreatment

Diesel particulate filter lamp

message error

This DTC will be recorded when the control unit sees an

invalid range on the diesel particulate filter lamp message

from the engine ECU or when the message has timed out.

Some possible causes for this include faulty wiring to the

engine controller or a faulty engine controller.

369809

Aftertreatment

Exhaust system high temperature

lamp message error

This DTC will be recorded when the control unit sees an

invalid range on the hot exhaust system temperature lamp

message from the engine ECU or when the message has

timed out. Some possible causes for this include faulty

wiring to the engine controller or a faulty engine controller.

370309

Aftertreatment

Regeneration inhibited due to

inhibit switch message error

This DTC will be recorded when the control unit sees

an invalid range on the regeneration inhibited due to

inhibit switch message from the engine ECU or when the

message has timed out. Some possible causes for this

include faulty wiring to the engine controller or a faulty

engine controller.

512505

MUX3-P Power

Chassis Node Power Input 5 Fault

Inspect wiring and fusing of Chassis Node Power pin B19

512531

MUX3-P Power

Chassis Node Power Input 5 Fault

Inspect wiring and fusing of Chassis Node Power pin B19

512605

MUX3-P Power

Chassis Node Power Input 6 Fault

Inspect wiring and fusing of Chassis Node Power pin C19

512631

MUX3-P Power

Chassis Node Power Input 6 Fault

Inspect wiring and fusing of Chassis Node Power pin C19

512705

MUX3-P Power

Chassis Node Power Input 7 Fault

Inspect wiring and fusing of Chassis Node Power pin B18

512731

MUX3-P Power

Chassis Node Power Input 7 Fault

Inspect wiring and fusing of Chassis Node Power pin B18

512805

MUX3-P Power

Chassis Node Power Input 8 Fault

Inspect wiring and fusing of Chassis Node Power pin C15

512831

MUX3-P Power

Chassis Node Power Input 8 Fault

Inspect wiring and fusing of Chassis Node Power pin C15

524502

CECU

Diesel Exhaust Fluid

Diesel exhaust fluid telltale

message error

This DTC will be recorded when the control unit receives

an invalid range on the diesel exhaust fluid telltale

message from the engine ECU or does not receive the

message in a timely manner.

524509

Diesel Exhaust Fluid

Diesel exhaust fluid telltale

message error

This DTC will be recorded when the control unit receives

Not Available Signal on the diesel exhaust fluid telltale

message from the engine ECU or when the message has

timed out. Some possible causes for this include faulty

wiring to the engine controller or a faulty engine controller.

524519

Diesel Exhaust Fluid

Diesel exhaust fluid telltale

message error

This DTC will be recorded when the control unit receives

an invalid range on the diesel exhaust fluid telltale

message from the engine ECU. Some possible causes

for this include faulty wiring to the engine controller or a

faulty engine controller.

524602

CECU

Diesel Exhaust Fluid

Diesel exhaust fluid inducement

severity error

This DTC will be recorded when the control unit sees

a invalid value from the J1939 network for Operator

Inducement Severity.

524609

Aftertreatment

Aftertreatment system operator

inducement severity message

error

This DTC will be recorded when the control unit received

a Not Available signal on the aftertreatment operator

inducement severity message from the engine ECU or

when the message has timed out. Some possible causes

for this include faulty wiring to the engine controller or a

faulty engine controller.

524619

Aftertreatment

Aftertreatment system operator

inducement severity message

error

This DTC will be recorded when the control unit

received an invalid range on the aftertreatment operator

inducement severity message from the engine ECU.