Doosan Forklift G/GC Fault Codes table

DFC

PROBABLE FAULT

FAULT ACTION *

CORRECTIVE ACTION FIRST CHECK

12

NONE

Signifies the end of one pass

through the fault list

NONE

None, used as end of the fault list

identification

131

Inj1Open

Gasoline Injector 1 open

circuit, broken injector 1 wire

or defective injector

(1) TurnOnMil

(2) Disable

LiquidO2Ctrl

(3) Delayed

EngineShutdown

Check INJ1 wiring for an open circuit

SECM (Signal) A5 to Injector 1 Pin A

Switched 12V to Injector 1 Pin B

Check Injector 1 Resistance, 12 to14

ohms (cold)

132

Inj2Open

Gasoline Injector 2 open

circuit, broken injector 2 wire

or defective injector

(1) TurnOnMil

(2) Disable

LiquidO2Ctrl

(3) Delayed

EngineShutdown

Check INJ2 wiring for an open circuit

SECM (Signal) A8 to Injector 2 Pin A

Switched 12V to Injector 2 Pin B

Check Injector 2 Resistance, 12 to14

ohms (cold)

133

Inj3Open

Gasoline Injector 3 open

circuit, broken injector 3 wire

or defective injector

(1) TurnOnMil

(2) Disable

LiquidO2Ctrl

(3) Delayed

EngineShutdown

Check INJ3 wiring for an open circuit

SECM (Signal) A4 to Injector 3 Pin A

Switched 12V to Injector 3 Pin B

Check Injector 3 Resistance, 12 to14

ohms (cold)

134

Inj4Open

Gasoline Injector 4 open

circuit, broken injector 4 wire

or defective injector

(1) TurnOnMil

(2) Disable

LiquidO2Ctrl

(3) Delayed

EngineShutdown

Check INJ4 wiring for an open circuit

SECM (Signal) A7 to Injector 4 Pin A

Switched 12V to Injector 4 Pin B

Check Injector 4 Resistance, 12 to 14

ohms (cold)

141

(14)

ECTRangeLow

Coolant Sensor failure or

shorted to GND

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Check ECT sensor connector and wiring

for a short to GND

SECM (Signal) Pin B15 To ECT Pin 3

SECM (Sensor GND) Pin B1 to ECT Pin 1

SECM (System GND) Pin A16, B17

151

(15)

ECTRangeHigh

Coolant sensor disconnected

or open circuit

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Check if ECT sensor connector is

disconnected or for an open ECT circuit

SECM (Signal) Pin B15 to ECT Pin 3

SECM (Sensor GND) Pin B1 to ECT Pin 1

161

(16)

ECTOverTempFault

Engine coolant temperature is high. The sensor has measured an excessive

coolant temperature typically due to the engine overheating.

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Check coolant system for radiator

blockage, proper coolant level and for leaks in the system.

Possible ECT short to GND, check ECT signal wiring SECM (Signal) Pin B15 to ECT Pin 3 SECM (Sensor GND) Pin B1 to ECT Pin 1 SECM (System GND) Pin A16, B17 Check regulator for coolant leaks

171

ECT_IR_Fault Engine coolant temperature

not changing as expected

TurnOnMil (Disabled in all software

MI07SEQ062V05 and

higher)

Check for coolant system problems, e.g. defective or stuck thermostat

181

ECT_IR_Fault Engine coolant temperature

not changing as expected

(1) TurnOnMil

(2) Delayed

EngineShutdown

Check fuel select switch connection for a short to GND

SECM (SIGNAL) Pin A12

SECM (SIGNAL) Pin A15

SECM (Sensor GND) Pin B1

191

FuelSelectConflict

Conflict in fuel select signals, normally set if both of the fuel select signals are shorted to

ground

None

Check CAM sensor connections

SECM (SIGNAL) Pin B10 to CAM sensor Pin 2 SECM (Sensor GND) Pin B1 to CAM sensor Pin 3

Switched 12V to CAM sensor Pin 1

Check for defective CAM sensor

192

CamSyncFault

Loss of synchronization on the CAM sensor, normally due to

noise on the signal or an

intermittent connection on the CAM sensor

None

Check CAM sensor connections

SECM (SIGNAL) Pin B10 to CAM sensor Pin 2 SECM (Sensor GND) Pin B1 to CAM sensor Pin 3

Switched 12V to CAM sensor Pin 1

Check for defective CAM sensor

193

CrankEdgesFault

No crankshaft signal when engine is known to be rotating, broken crankshaft sensor

leads or defective crank

sensor

None

Check Crankshaft sensor connections

SECM (SIGNAL) Pin B5 to Crank sensor Pin 3 SECM (Sensor GND) PIN B1 to Crank sensor Pin 2

Switched 12V to Crank sensor Pin 1

Check for defective Crank sensor

194

CrankSyncFault Loss of synchronization on the crankshaft sensor, normally due to noise on the signal or an intermittent connection on the crankshaftsensor

None

Check Crankshaft sensor connections

SECM (SIGNAL) Pin B5 to Crank sensor Pin 3 SECM (Sensor GND) PIN B1 to Crank sensor Pin 2

Switched 12V to Crank sensor Pin 1

Check for defective Crank sensor

DFC

PROBABLE FAULT

FAULT ACTION

CORRECTIVE ACTION FIRST CHECK

221

(22)

TPS1RangeLow

TPS1 sensor voltage out of

range low, normally set if theTPS1 signal has shorted to ground, circuit has opened or sensor has failed

(1) TurnOnMil

(2) CutThrottle

Check throttle connector connection and TPS1 sensor for an open circuit or short to GNDSECM Pin B23 (signal) to ETC Pin 6 SECM Pin B1 (sensor GND) to ETC Pin 2SECM(system GND) PinA16B17

222

TPS2RangeLow TPS2 sensor voltage out of range low, normally set if the

TPS2 signal has shorted to

ground, circuit has opened or sensor has failed

(1) TurnOnMil

(2) CutThrottle

Check throttle connector connection and TPS2 sensor for an open circuit or short to GND

SECM Pin B4 (signal) to ETC Pin 5

SECM Pin B1 (sensor GND) to ETC Pin 2

SECM (system GND) Pin A16, B17

222

TPS1RangeHigh

TPS1 sensor voltage out of

range high, normally set if the TPS1 signal has shorted to power or the ground for the sensor has opened

(1) TurnOnMil

(2) CutThrottle

Check throttle connector and TPS1 sensor wiring for a shorted circuit

SECM Pin B23 (signal) to ETC Pin 6

SECM Pin B1 (sensor GND) to ETC Pin

222

TPS2RangeHigh

TPS2 sensor voltage out of

range high, normally set if the TPS2 signal has shorted to power or the ground for the sensor has opened

(1) TurnOnMil

(2) CutThrottle

Check throttle connector and TPS1 sensor wiring for a shorted circuit

SECM Pin B4 (signal) to ETC Pin 5

SECM pin B1 (sensor GND) to ETC Pin 2

222

TPS1AdaptLoMin

Learned closed throttle end ofTPS1 sensor range lower than expected

None

N/A

242

TPS2AdaptLoMin

Learned closed throttle end of TPS2 sensor range lower than expected

None

N/A

242

TPS1AdaptHiMax

Learned WOT end of TPS1

sensor range higher than

expected

None

N/A

252

TPS2AdaptHiMax

Learned WOT end of TPS2

sensor range higher than

expected

None

N/A

271

TPS1AdaptHiMin

Learned WOT end of TPS1

sensor range lower than

expected

None

N/A

272

TPS2AdaptHiMin Learned WOT end of TPS2 sensor range lower than expected

None

N/A

281

TPS1AdaptLoMax

Learned closed throttle end

of TPS1 sensor range higher than expected

None

N/A

282

TPS2AdaptLoMax

Learned closed throttle end of TPS2 sensor range higher than expected

None

N/A

291

TPS_Sensors_Conflict

TPS sensors differ by more

than expected amount

NOTE: The TPS is not a

serviceable item and can

only be repaired by

replacing the DV-EV throttle assembly.

(1) TurnOnMil

(2) CutThrottle

Check the throttle connector and pins for corrosion. To check the TPS disconnect the throttle connector and measure the resistance from:

TPS Pin 2 (GND) to Pin 6 (TPS1 SIGNAL)

(0.7 Ω ± 30%) TPS Pin 3 (PWR) to Pin 6 (TPS1 SIGNAL) (1.4 Ω ± 30%)

292

TPS_Intermittent

Signal from the SECM to the throttle position sensor power or ground is not continuous

TurnOnMil

Check the throttle connector and pins for corrosion.

Check continuity between throttle body Pin 3 and SECM Pin B24 (XDPR +5Vdc)

Check continuity between throttle body Pin 2 and SECM Pin B1 (sensor ground)

Check continuity on TPS1:

between throttle body Pin 6 and SECM Pin B23 Check continuity on TPS2:

between throttle body Pin 5 and SECM Pin B4 *Note: move wires around when checking for continuity to duplicate intermittent signal

331

(33)

MAPTimeRangeLow

Manifold Absolute Pressure

sensor input is low, normally set if the TMAP pressure signal wire has been disconnected or shorted to ground or the circuit has opened to SECM

TurnOnMil

Check TMAP connector and MAP signal

wiring for an open circuit

TMAP Pin 4 to SECM Pin B18 (signal)

TMAP Pin 1 to SECM Pin B1 (sensor GND) TMAP Pin 3 to SECM Pin B24 (XDRP +5 Vdc)

Check the MAP sensor by disconnecting

the TMAP connector and measuring at the sensor: TMAP Pin 1(GND) to

Pin 4 (pressure signal KPA) (2.4kΩ - 8.2kΩ) TMAP Pin 3 (power) to Pin 4 (pressure signal KPA) (3.4kΩ 8.2kΩ)

332

MAPRangeLow

Manifold Absolute Pressure

sensor input is low, normally

set if the TMAP pressure

signal wire has been

disconnected or shorted to

ground or the circuit has

opened to the SECM

(1) TurnOnMil

(2) EngineShutdown

Check TMAP connector and MAP signal

wiring for an open circuit

TMAP Pin 4 to SECM Pin B18 (signal)

TMAP Pin 1 to SECM Pin B1 sensorGND)

TMAP Pin 3 to SECM Pin B24 (XDRP +5

Vdc) Check the MAP sensor by disconnect-ing the TMAP connector and measuring at the sensor:

TMAP Pin 1(GND) to Pin 4 (pressure signal KPA) (2.4kΩ - 8.2kΩ)

TMAP Pin 3 (power) to Pin 4 (pressure signal KPA) (3.4kΩ - 8.2kΩ)

341

(34)

MAPTimeRangeHigh

Manifold Absolute Pressure

Sensor Input is High, normally  set if the TMAP pressure

signal wire has become

shorted to power, shorted to the IAT signal, the TMAP has failed or the SECM has failed.

TurnOnMil

Check TMAP connector and MAP signal

wiring for an open circuit

TMAP Pin 4 to SECM Pin B18 (signal)

TMAP Pin 1 to SECM Pin B1 sensorGND)

TMAP Pin 3 to SECM Pin B24 (XDRP +5

Vdc) Check the MAP sensor by disconnect-ing the TMAP connector and measuring at the sensor:

TMAP Pin 1(GND) to Pin 4 (pressure signal KPA) (2.4kΩ - 8.2kΩ)

TMAP Pin 3 (power) to Pin 4 (pressure signal KPA) (3.4kΩ - 8.2kΩ)

342

MAPRangeHigh

Manifold Absolute Pressure

Sensor Input is High, normally

set if the TMAP pressure

signal wire has become

shorted to power, shorted to the IAT signal, the TMAP has failed or the SECM has failed

(1) TurnOnMil

(2) Engine

Shutdown

Check TMAP connector and MAP signal

wiring for an open circuit

TMAP Pin 4 to SECM Pin B18 (signal)

TMAP Pin 1 to SECM Pin B1 sensorGND)

TMAP Pin 3 to SECM Pin B24 (XDRP +5

Vdc) Check the MAP sensor by disconnect-ing the TMAP connector and measuring at the sensor:

TMAP Pin 1(GND) to Pin 4 (pressure signal KPA) (2.4kΩ - 8.2kΩ)

TMAP Pin 3 (power) to Pin 4 (pressure signal KPA) (3.4kΩ - 8.2kΩ)

351

MAP_IR_HI MAP sensor indicates higher pressure than expected

TurnOnMil

Check for vacuum leaks. Check that TMAP sensor is mounted properly. Possible defective TMAP sensor.

352

MAP_IR_LO

MAP sensor indicates lower

pressure than expected

TurnOnMil

Possible defective TMAP sensor.

353

MAP_STICKING

MAP sensor not changing as expected

TurnOnMil

Check that TMAP sensor is mounted properly.

Possible defective TMAP sensor.

371

(37)

IATRangeLow

Intake Air Temperature

Sensor Input is Low normally set if the IAT temperature

sensor wire has shorted to

chassis ground or the sensor

has failed.

TurnOnMil

Check TMAP connector and IAT signal wiring for a shorted circuit

TMAP Pin 2 to SECM Pin B12 (signal)

TMAP Pin 1 to SECM Pin B1 (sensor GND)

To check the IAT sensor of the TMAP

disconnect the TMAP connector and measure

the IAT resistance

Resistance is approx 2400 ohms at room

temperature.

381

(38)

IATRangeHigh

Intake Air Temperature

Sensor Input is High normally

set if the IAT temperature

sensor wire has been

disconnected or the circuit has

opened to the SECM.

TurnOnMil

Check TMAP connector and IAT signal wiring for a shorted circuit

TMAP Pin 2 to SECM Pin B12 (signal)

TMAP Pin 1 to SECM Pin B1 (sensor GND) To check the IAT sensor of the TMAP disconnect the TMAP connector and measure the IAT resistance

Resistance is approx 2400 ohms at room

temperature.

391

IAT_IR_Fault

Intake Air Temperature not

changing as expected

None

Check connections to TMAP sensor. Check that TMAP sensor is properly mounted to manifold.

421

EST1_Open

EST1 output open, possibly

open EST1 signal or defective

spark module

TurnOnMil

Check coil driver wiring and connector for open circuit SECM Pin A9 (EST1) to OEM ignition system. See application note. Verify GND on ignition module

Pin A (of both connectors) Verify +12 Vdc on ignition module Pin B (of both connectors) Refer to application manual for specific engine details.

422

EST2_Open

EST2 output open, possibly

open EST2 signal or defective

spark module

TurnOnMil

Check coil driver wiring and connector for open circuit SECM Pin A10 (EST2) to OEM ignition system. See application note. Verify GND on ignition module

Pin A (of both connectors) Verify +12 Vdc on ignition module Pin B (of both connectors) Refer to application manual for specific engine details.

423

EST3_Open

EST3 output open, possibly

open EST3 signal or defective

spark module

TurnOnMil

Check coil driver wiring and connector for open circuit SECM Pin A3 (EST3) to OEM ignition system. See application note. Verify GND on ignition module

Pin A (of both connectors) Verify +12 Vdc on ignition module Pin B (of both connectors) Refer to application manual for specific engine details.

424

EST4_Open

EST4 output open, possibly

open EST4 signal or defective spark module

TurnOnMil

Check coil driver wiring and connector for open circuit SECM Pin A6 (EST4) to OEM ignition system. See application manual. Verify GND on ignition module

Pin A (of both connectors)Verify +12 Vdc on ignition modulePin B (of both connectors) Refer to application manual for specific engine details.

425

EST5_Open

EST5 output open, possibly

open EST5 signal or defective spark module

None

N/A

426

EST6_Open

EST6 output open, possibly

open EST6 signal or defective spark module

None

N/A

427

EST7_Open

EST7 output open, possibly

open EST7 signal or defective spark module

None

N/A

428

EST8_Open

EST8 output open, possibly

open EST8 signal or defective spark module

None

N/A

431

EST1_Short

EST1 output shorted high or low, EST1 signal shorted to ground or power or defective spark module

None

N/A

DFC

PROBABLE FAULT

FAULT ACTION

CORRECTIVE ACTION FIRST CHECK

432

EST2_Short

EST2 output shorted high or low, EST2 signal shorted to ground or power or defective spark module

None

N/A

433

EST3_Short

EST3 output shorted high or low, EST3 signal shorted to ground or power or defective spark module

None

N/A

434

EST4_Short

EST4 output shorted high or low, EST4 signal shorted to ground or power or defective spark module

None

N/A

435

EST5_Short

EST5 output shorted high or low, EST5 signal shorted to ground or power or defective spark module

None

N/A

436

EST6_Short

EST6 output shorted high or low, EST6 signal shorted to ground or power or defective spark module

None

N/A

437

EST7_Short

EST7 output shorted high or low, EST7 signal shorted to ground or power or defective spark module

None

N/A

438

EST8_Short

EST8 output shorted high or low, EST8 signal shorted to ground or power or defective spark module

None

N/A

461

(26)

ETC_Sticking

Electronic Throttle Control is sticking. This can occur if the throttle plate (butterfly valve) inside the throttle bore is sticking. The plate sticking can be due to some type of obstruction, a loose throttle plate, or worn components shaft

bearings. NOTE: The throttle assembly is not a serviceable item and can only be repaired by replacing the DV-EV throttle assembly.

(1) TurnOnMil

(2)EngineShutdown

(3) CutThrottle

Check for debris or obstructions inside

the throttle body

Perform the throttle test using the

Service Tool and re-check for fault

• Check throttle-plate shaft for bearing

wear

• Check the ETC driver wiring for an

open circuit

SECM Pin A17 to ETC + Pin 1

SECM Pin A18 to ETC - Pin 4

Check the ETC internal motor drive by

disconnecting the throttle connector and measuring the motor drive resistance at the throttle

TPS Pin 1 (+DRIVER) to

Pin 4 (-DRIVER) ~3.0-4.0Ω

471

ETC_Open_Fault

Electronic Throttle Control Driver has failed, normally set if driver

signals have failed open or

become disconnected,

electronic throttle or SECM is defective.

(1) TurnOnMil

(2) CutThrottle

Check the ETC driver wiring for an open

Circuit SECM Pin A17 to ETC + Pin 1

SECM Pin A18 to ETC - Pin 4

Check the ETC internal motor drive by

disconnecting the throttle connector and measuring the motor drive resistance at the throttle

TPS Pin 1 (+DRIVER) to

Pin 4 (-DRIVER) ~3.0-4.0Ω

481

(28)

ETCSpringTest

Electronic Throttle Control

Spring Return Test has failed. The SECM will perform a safety test of the throttle return spring

following engine shutdown. If the drive mechanism is damaged, or

the return spring has lost tension the throttle will fail the test and set the fault.

NOTE: The throttle assembly is not a serviceable item and

can only be repaired by

replacing the DV-EV throttle assembly.

(1) TurnOnMil

(2)EngineShutdown

(3) CutThrottle

Perform throttle spring test by cycling

the ignition key and re-check for fault

491

(29)

HbridgeFault_ETC

Electronic Throttle Control

Driver has failed.

Indeterminate fault on

Hbridge driver for electronic throttle control.

Possibly either ETC+ or

ETC- driver signals have

been shorted to ground

(1) TurnOnMil

(2) CutThrottle

Check ETC driver wiring for a shorted circuit SECM Pin A17 to ETC + Pin 1

SECM Pin A18 to ETC - Pin 4

• Perform the throttle test using the Service Tool and re-check for fault

Check the ETC internal motor drive by

disconnecting the throttle connector and measuring the motor drive resistance at the throttle

TPS Pin 1 (+DRIVER) to

Pin 4 (-DRIVER) ~3.0-4.0Ω

521

(52)

LowOilPressureFault

Low engine oil pressure

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Check engine oil level Check electrical connection to the oil pressure switch

SECM Pin B9 to Oil Pressure Switch

531

(53)

SysVoltRangeLow

System voltage too low

TurnOnMil

Check battery voltage

• Perform maintenance check on electrical connections to the battery and chassis ground

• Check battery voltage during starting and with the engine running to verify charging system and alternator function

• Measure battery power at SECM with a multimeter (with key on)

SECM Pin A23 (DRVP) to

SECM Pin A16 (DRVG)

SECM Pin A23 (DRVP) to

SECM Pin B17 (DRVG)

541

(54)

SysVoltRangeHigh

System voltage too high

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Check battery and charging system voltage

• Check battery voltage during starting and with the engine running

• Check voltage regulator, alternator, and charging system

• Check battery and wiring for overheating and damage

• Measure battery power at SECM with a multimeter (with key on)

SECM Pin A23 (DRVP) to

SECM Pin A16 (DRVG)

SECM Pin A23 (DRVP) to

SECM Pin B17 (DRVG)

551

(55)

SensVoltRangeLow

Sensor reference voltage

XDRP too low

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Measure transducer power at the

TMAP connector with a multimeter

TMAP Pin 3 XDRP +5 Vdc to

TMAP Pin 1 XDRG GND Verify transducer power at the SECM with a multimeter SECM Pin B24 +5 Vdc to SECM Pin B1 XDRG GND Verify transducer power at ETC with a multimeter ETC Pin 3 XDRP PWR to ETC Pin 2 XDRG GND Verify transducer power to the foot pedal with a millimeter.

561

(56)

SensVoltRangeHigh

Sensor reference voltage

XDRP too high

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Measure transducer power at the

TMAP connector with a multimeter

TMAP Pin 3 XDRP +5 Vdc to

TMAP Pin 1 XDRG GND Verify transducer power at the SECM with a multimeter SECM Pin B24 +5 Vdc to

SECM Pin B1 XDRG GND Verify transducer power at ETC with a

Multimeter ETC Pin 3 XDRP PWR to ETC Pin 2 XDRG GND Verify transducer power to the foot pedal with a

multimeter.

571

(57)

HardOverspeed

Engine speed has

exceeded the third level (3

of 3) of overspeed

protection

(1) TurnOnMil

(2) HardRevLimit

(3) EngineShutdown

Usually associated with additional ETC faults

• Check for ETC Sticking or other ETC faults Verify if the lift truck was motored down a steep grade

572

MediumOverspeed

Engine speed has

exceeded the second level

(2 of 3) of overspeed

protection

(1) TurnOnMil

(2) MediumRevLimit

(3) DelayedEngine

Shutdown

Usually associated with additional ETC faults

• Check for ETC Sticking or other ETC faults Verify if the lift truck was motored down a steep grade

573

SoftOverspeed

Engine speed has

exceeded the first level (1

of 3) of overspeed

protection

(1) TurnOnMil

(2) SoftRevLimit

Usually associated with additional ETC faults

• Check for ETC Sticking or other ETC faults Verify if the lift truck was motored down a steep grade

611

(61)

APP1RangeLow

APP1 sensor voltage out

of range low, normally set

if the APP1 signal has

shorted to ground, circuit

has opened or sensor has

failed

TurnOnMil

Check foot pedal connector

• Check APP1 signal at SECM PIN B7

612

(65)

APP2RangeLow

APP2 sensor voltage out of range low, normally set if the APP2 signal has shorted to ground, circuit has

opened or sensor has failed

TurnOnMil

Check foot pedal connector

• Check APP2 signal at SECM PIN

B16

621

(62)

APP1RangeHigh

APP1 sensor voltage out of range high, normally set if the APP1 signal has shorted to power or the ground

for the sensor has opened

TurnOnMil

Check foot pedal connector

• Check APP1 signal at SECM PIN

B7

622

(66)

APP2RangeHigh

APP2 sensor voltage out of range high, normally set if the APP2 signal has shorted to power or the ground

for the sensor has opened

TurnOnMil

Check foot pedal connector

• Check APP2 signal at SECM PIN

B16

631

(63)

APP1AdaptLoMin

Learned idle end of APP1 sensor range lower than expected

TurnOnMil

Check APP connector and pins for

corrosion

• Cycle the pedal several times and

check APP1 signal at SECM Pin B7

632

(67)

APP2AdaptLoMin

Learned idle end of APP2 sensor

range lower than expected

TurnOnMil

Check APP connector and pins for

corrosion

• Cycle the pedal several times and

check APP2 signal at SECM Pin B16

641

(64)

APP1AdaptHiMax

Learned full pedal end of APP1 sensor range higher than expected

TurnOnMil

Check APP connector and pins for

corrosion

Cycle the pedal several times and

check APP1 signal at SECM Pin B7

642

(68)

APP2AdaptHiMax

Learned full pedal end of APP2 sensor range higher than expected

TurnOnMil

Check APP connector and pins for

corrosion

Cycle the pedal several times and

check APP2 signal at SECM Pin B16

651

APP1AdaptHiMin

Learned full pedal end of APP1 sensor range lower than expected

TurnOnMil

Check APP connector and pins for

corrosion

Cycle the pedal several times and

check APP1 signal at SECM Pin B7

652

APP2AdaptHiMin

Learned full pedal end of APP2 sensor range lower than expected

TurnOnMil

Check APP connector and pins for

corrosion

Cycle the pedal several times and

check APP2 signal at SECM Pin B16

661

APP1AdaptLoMax

Learned idle end of APP1 sensor range higher than expected

TurnOnMil

Check APP connector and pins for

corrosion

Cycle the pedal several times and

check APP1 signal at SECM Pin B7

662

APP2AdaptLoMax

Learned idle end of APP2 sensor range higher than expected

TurnOnMil

Check APP connector and pins for

corrosion

Cycle the pedal several times and

check APP2 signal at SECM Pin B16

691

(69)

APP_Sensors_Conflict

APP position sensors do no not track

well, intermittent connections to APP

or defective pedal assembly

(1) TurnOnMil

(2) Cut Throttle

Check APP connector and pins for

corrosion

• Cycle the pedal several times and

check APP1 signal at SECM Pin B7

• Cycle the pedal several times and

check APP2 signal at SECM Pin B16

711

(71)

LSDFault_Dither1

Dither Valve 1 Fault, signal

has opened or shorted to

ground or power or defective

dither 1 valve

(1) TurnOnMil

(2) Disable

GasO2 Ctrl

(3) Disable

GasPost O2Ctrl

(Certified Units

Only)

Check FTV1 for an open wire or FTV connector being disconnected

FTV1 Pin 1 (signal) to SECM Pin A1

FTV1 Pin 2 (power) to SECM (DRVP) Pin A23 Check FTV1 for an open coil by disconnecting the FTV connector and measuring the resistance (~26Ω ± 2Ω )

712

LSDFault_Dither2

Dither Valve 2 Fault, signal

has opened or shorted to

ground or power or defective

dither 2 valve

(1) TurnOnMil

(2) Disable

GasO2 Ctrl

(3) Disable

GasPost O2Ctrl

(Certified Units

Only)

Check FTV1 for an open wire or FTV connector being disconnected or signal shorted to GND FTV2 Pin 1 (signal) to SECM Pin A2 FTV2 Pin 2 (power) to SECM (DRVP) Pin A23 Check FTV1 for an open coil by disconnecting the FTV connector and measuring the

resistance (~26Ω ± 2Ω )

713

LSDFault_CSValve

None

N/A

714

LSDFault_CheckEngine

Check Engine Lamp Fault,

signal has opened or shorted to ground or power or defective check engine lamp

None

Check ‘Check Engine Lamp’ for an open wire or shorted to GND

715

LSDFault_CrankDisable

Crank Disable Fault, signal

has opened or shorted to

ground or power or defective crank disable relay

None

N/A

716

LSDFault_FuelPump

Fuel pump fault, signal has

opened, shorted to ground or power, or defective fuel

pump

TurnOnMil

Check fuel pump for an open wire or connector being disconnected or signal shorted to GND Fuel Pump Pin B (signal) from SECM Pin A13 Fuel Pump Pin A (power) from main relay 1 Pin

A23 Check Fuel Pump for an open coil by disconnecting the Fuel Pump connector and measuring the resistance

(~26Ω ± 3Ω) Check for 12V to fuel pump

717

LSDFault_LockOff

Fuel lock off Valve Fault,

signal has opened or shorted to ground or power or defective Fuel lock off valve

TurnOnMil

Check fuel lock off valve for an open wire or connector being disconnected or signal shorted to GND

Lock off Pin B (signal) from SECM Pin A11 Lock off Pin A (power) from main relay 1 Pin A23 Check lock off valve for an open coil by disconnecting the lock off valve connector and

measuring the resistance (~26Ω ± 3Ω)

Check for 12V to lock off valve

DFC

PROBABLE FAULT

FAULT ACTION

CORRECTIVE ACTION FIRST CHECK

718

LSDFault_MIL

Malfunction Indicator Lamp Fault, signal has opened or shorted to ground or power

or defective MIL lamp

None

None

721

(72)

GasFuelAdaptRangeLo

In LPG mode, system had to adapt rich more than

expected

(1) TurnOnMil

(2) Disable GasO2 Ctrl

(3) Disable GasPost O2Ctrl (Certified Units Only)

Check for vacuum leaks.

Check fuel trim valves, e.g. leaking valve or hose

Check for missing orifice(s).

722

GasDesEquivLo In LPG mode, system had to adapt rich more than expected

None

N/A

731

(73)

GasFuelAdaptRangeHi

In LPG mode, system had

to adapt lean more than

expected

(1) TurnOnMil

(2) DisableGasO2 Ctrl (3) Disable

GasPost O2Ctrl

(Certified Units Only)

Check dual dither valves, e.g. plugged valve or hose. Check for plugged orifice(s).

732

GasDesEquivHi

In LPG mode, system had

to adapt rich more than

expected

None

N/A

741

(74)

GasO2NotActive

Pre-catalyst O2 sensor

inactive on LPG, open O2

sensor signal or heater

leads, defective O2

sensor

(1) TurnOnMil

(2) DisableGas

O2Ctrl

(3) Disable

GasPost O2Ctrl

(Certified Units Only)

Check that Pre-catalyst O2 sensor connections are OK.

O2 (signal) Pin 3 to SECM Pin B13

O2 Pin 2 (HEATER GND) to SECM (DRVG

GNG) Pins A16, B17

O2 Pin 1 (HEATER PWR) to SECM (DRVP + 12V) Pin A23 Verify O2 sensor heater circuit is operating by measuring heater resistance (2.1Ω ± 0.4Ω) O2 Pin 2 (HEATER GND) to Pin 1 (HEATER PWR)

742

GasPostO2NotActive

Post-catalyst O2 sensor

inactive on LPG, open O2

sensor signal or heater

leads, defective O2

sensor.

(1) TurnOnMil

(2) DisableGasPost

O2Ctrl

(Certified Units Only)

Check that Post-catalyst O2 sensor

connections are OK. O2 (signal) Pin 3 to SECM Pin B19 O2 Pin 2 (HEATER GND) to SECM (DRVG GNG) Pins A16, B17

O2 Pin 1 (HEATER PWR) to Post O2 Heater Relay. Relay pin 87. This relay only turns on after engine has been running for some time and SECM has calculated that water condensation in exhaust has been removed by

exhaust heat. Post O2 Heater Relay has

SECM (DRVP + 12V) applied to the relay coil power. The relay coil ground is controlled by SECM Pin A20 to activate the relay to flow current through the post O2 heater. Verify O2 sensor heater circuit is operating by measuring heater resistance (2.1Ω ± 0.4Ω) O2 Pin 2 (HEATER GND) to Pin 1 (HEATERPWR)

743

GasCatInactive

None

N/A

751

GasO2FailedLean

Pre-catalyst O2 sensor

indicates extended lean

operation on LPG

(1) TurnOnMil

(2) DisableGas

O2Ctrl (3) Disable

GasPost O2Ctrl (Certified Units

Only)

Check for vacuum leaks. Check dual dither valves, e.g. leaking valve or hose. Check for missing orifice(s).

752

GasPostO2FailedLean

Pre-catalyst O2 sensor

indicates extended lean

operation on LPG

(1) TurnOnMil

(2) DisableGasPost

O2Ctrl

(Certified Units Only)

Correct other faults that may contribute to 752 (e.g. faults pertaining to dither valves, Pre-Cat O2, Post Cat O2 sensor)

Check for vacuum leaks

Check for leaks in exhaust, catalytic converter, HEGO sensors; repair leaks.

Check all sensor connections (see fault 742 corrective actions).

771

(77)

GasO2FailedRich

Pre-catalyst O2 sensor

indicates extended rich

operation on LPG

(1) TurnOnMil

(2) DisableGas

O2Ctrl (3) Disable GasPost O2Ctrl (Certified Units Only)

Check dual dither valves, e.g. plugged valve or hose. Check for plugged orifice(s).

772

GasPostO2FailedRich

Pre-catalyst O2 sensor

indicates extended rich

operation on LPG

(1) TurnOnMil

(2) DisableGasPost

O2Ctrl

(Certified Units

Only)

Correct other faults that may contribute to 772 (e.g. faults pertaining to FTVs, Pre-Cat O2, Post Cat O2 sensor)

Look for leaks in exhaust, catalytic converter, HEGO sensors; repair leaks.

Check all sensor connections (see fault 742 corrective actions).

821

LiqFuelAdaptRangeHi

In Gasoline mode, system

had to adapt lean more

than expected

(1) TurnOnMil

(2) Disable

LiquidO2 Ctrl

(3) Disable LiqPost

O2Ctrl

Check for vacuum leaks. Low gasoline fuel pressure, perform gasoline

pressure test. Injector problems, e.g. plugged, defective injector.

822

LiqDesEquivHi

None

N/A

831

LiqFuelAdaptRangeLow

In Gasoline mode, system

had to adapt rich more than expected

(1) TurnOnMil

(2) Disable Liquid O2 Ctrl  (3) Disable LiqPostO2Ctrl

Low gasoline fuel pressure, perform gasoline pressure test

Injector problems, e.g. leaking, defective injector.

832

LiqDesEquivLo

None

N/A

841

LiqO2NotActive

Pre-catalyst O2 sensor

inactive on gasoline, open

O2 sensor signal or heater

leads, defective O2 sensor

(1) TurnOnMil

(2) DisableLiquid

O2Ctrl

(3)DisableLiquid

PostO2Ctrl

Check that Pre-catalyst O2 sensor connections

are OK. O2 (signal) Pin 3 to SECM Pin B13 O2 Pin 2 (HEATER GND) to SECM (DRVG GNG) Pins A16, B17

O2 Pin 1 (HEATER PWR) to SECM (DRVP + 12V) PIN A23 Verify O2 sensor heater circuit is operating by measuring heater resistance (2.1Ω ± 0.4Ω) O2 Pin 2 (HEATER GND) to Pin 1 (HEATER PWR)

842

LiqPostO2NotActive

Post-catalyst O2 sensor

inactive on gasoline, open

O2 sensor signal or heater

leads, defective O2 sensor.

(1) TurnOnMil

(2) DisableLiqPost

O2Ctrl

(Certified Units

Only)

Check that Post-catalyst O2 sensor

connections are OK.

O2 (signal) Pin 3 to SECM Pin B19

O2 Pin 2 (HEATER GND) to SECM (DRVG

GNG) Pins A16, B17 O2 Pin 1 (HEATER PWR) to Post O2 Heater Relay. Relay pin 87. This relay only turns on after engine has been running for some time

and SECM has calculated that water

condensation in exhaust has been removed by exhaust heat. Post O2 Heater Relay has SECM (DRVP + 12V) applied to the relay coil power. The relay coil ground is controlled by SECM Pin A20 to activate the relay to flow

current through the post O2 heater.

Verify O2 sensor heater circuit is operating by measuring heater resistance (2.1Ω ± 0.4Ω) O2 Pin 2 (HEATER GND) to Pin 1 (HEATER PWR)

843

LiqCatInactive

None

N/A

851

LiqO2FailedLean

Pre-catalyst O2 sensor

indicates extended lean

operation on gasoline

(1) TurnOnMil

(2) DisableLiquid

O2Ctrl

(3)DisableLiquid

PostO2Ctrl

Check for vacuum leaks. Low gasoline fuel pressure, perform gasoline pressure test. Injector problems, e.g. plugged, defective injector

852

LiqPostO2FailedLean

Pre-catalyst O2 sensor

indicates extended lean

operation on gasoline

(1) TurnOnMil

(2) DisableLiqPost

O2Ctrl

(Certified Units Only)

Correct other faults that may contribute to 852 (e.g. faults pertaining to Injectors, MAP, IAT, Pre-Cat O2, Post Cat O2 sensor)

Look for leaks in exhaust, catalytic converter, HEGO sensors; repair leaks.

Check all sensor connections (see fault 842 corrective actions).

871

LiqO2FailedRich

Pre-catalyst O2 sensor

indicates extended rich

operation on gasoline

(1) TurnOnMil

(2) DisableLiquid

O2Ctrl

(3)DisableLiquid

PostO2Ctrl

High gasoline fuel pressure, perform gasoline pressure test

Injector problems, e.g. leaking, defective injector

872

LiqPostO2FailedRich

Pre-catalyst O2 sensor

indicates extended rich

operation on gasoline

(1) TurnOnMil

(2) DisableLiq

PostO2Ctrl

(Certified Units Only)

Correct other faults that may contribute to 872 (e.g. faults pertaining to Injectors, MAP, IAT, Pre-Cat O2, Post Cat O2 sensor) Look for leaks in exhaust, catalytic converter, HEGO sensors; repair leaks. Check all sensor connections (see fault 842 corrective actions).

911

O2RangeLow

Pre-catalyst O2 sensor

voltage out of range low,

sensor signal shorted to

ground

None

N/A

912

O2_PostCatRangeLow

Post-catalyst O2 sensor

voltage out of range low,

sensor signal shorted to

ground

None

N/A

921

O2RangeHigh

Pre-catalyst O2 sensor

voltage out of range high,

sensor signal shorted to

power

(1) TurnOnMil

(2) DisableLiquid O2Ctrl

(3) DisableGas

O2Ctrl (Certified Units Only)

Check if O2 sensor installed before catalyst is

shorted to +5Vdc or battery.

O2 (signal) Pin 3 to SECM Pin B13

SECM (XDRP + 5V) Pin B24

SECM (DRVP + 12V) Pin A23

922

O2_PostCatRangeHigh

Post-catalyst O2 sensor

voltage out of range low,

sensor signal shorted to

ground

(1) TurnOnMil

(2) Disable asoline

Post-catalyst

O2Ctrl (3) Disable LPG Post-catalyst

O2Ctrl (Certified Units Only)

Check if O2 sensor installed after catalyst is shorted to +5Vdc or battery.

O2 (signal) Pin 3 to SECM Pin B19

Possible voltage sources: SECM (XDRP + 5V) Pin B24 and SECM (DRVP + 12V) Pin

931

FuelTempRangeLow

Fuel Temperature Sensor

Input is Low normally set if

the fuel temperature

sensor wire has shorted to

chassis ground or the

sensor has failed.

TurnOnMil

(Certified Units Only)

Check fuel temp sensor connector and wiring for a short to GND

SECM (signal) Pin B14 to FTS Pin 1

SECM (sensor GND) Pin B1 to FTS Pin 2

SECM (system GND) Pin A16, B17

932

FuelTempRangeHigh

Fuel Temperature Sensor

Input is High normally set if

the fuel temperature

sensor wire has been

disconnected or the circuit

has opened to the SECM.

TurnOnMil

(Certified Units Only)

Check if fuel temp sensor connector is

disconnected or for an open FTS circuit

SECM (signal) Pin B14 to FTS Pin 1

SECM (sensor GND) Pin B1 to

FTS Pin 2

DFC

PROBABLE FAULT

FAULT ACTION

CORRECTIVE ACTION FIRST CHECK

933

TransOilTemp

Excessive transmission oil

temperature

(1) TurnOnMil

(2) DelayedEngine

Shutdown

Refer to drivetrain manufacturer’s

transmission service procedures.

991

ServiceFault1

Service Interval 1 has been

reached

None

Perform service procedure related to

Service Interval 1

(determined by OEM)

992

ServiceFault2

Service Interval 2 has been

reached

None

Perform service procedure related to

Service Interval 2

(determined by OEM)

993

ServiceFault3

Service Interval 3 has been

reached

None

Perform service procedure related to

Service Interval 3

(determined by OEM)

994

ServiceFault4

Service Interval 4 has been reached-replace HEGO

sensors

TurnOnMil

(Certified Units Only)

Replace Pre-catalyst HEGO sensor

Replace Post-catalyst HEGO sensor

995

ServiceFault5

Service Interval 5 has been

reached-replace timing belt

TurnOnMil

Replace engine timing belt