Using ABS Warning Light

When ABS warning light remains illuminated, EHCU will store DTCs and disable ABS system. If DTCs are not displayed, wiring harness from EHCU to ABS warning light may be disconnected. Check and repair harness if necessary.
Ensure ignition is off and brake pedal is released. Using jumper wire, jumper Data Link Connector (DLC) terminals No. 4 or 5, and No. 12. See Fig 1. Turn ignition on. DTC is displayed by flashing ABS warning light. See Fig 2.
A stored DTC is displayed 3 times, each being separated by a 3.2 second pause. If multiple DTCs are set, second DTC will follow after first DTC is displayed a third time. All DTCs contain 2 digits. First digit of DTC is identified by a series of .4 second flashes. After a 1.2 second pause, second digit of DTC will follow in another series of .4 second flashes. If no DTCs have been stored, ABS warning light will repeat DTC 12 (system normal).
If DTCs are retrieved, see DIAGNOSTIC TROUBLE CODE INDEX table. Identify DTC and perform specified diagnostic procedure. See DIAGNOSTIC TESTS . After repairs, DTCs must be cleared. See CLEARING DIAGNOSTIC TROUBLE CODES . If no DTCs are retrieved, diagnose by symptom. See SYMPTOM DIAGNOSIS .

Fig 1: Identifying Data Link Connector Terminals

Courtesy of ISUZU MOTOR CO.

Fig 2: ABS Diagnosis Using ABS Warning Light

Courtesy of ISUZU MOTOR CO.

DIAGNOSTIC TROUBLE CODE INDEX

Flash Code (Serial Code) ⁽¹⁾

Description

Possible Malfunction

12 (N/A)

Start Code

Normal Display

13 (C0285)

2WD Controller In 4WD Vehicle

Wiring

14 (C0270)

ALU Function Error

Coil Integrated Module

14 (C0271)

RAM Read/Write Error

Coil Integrated Module

14 (C0272)

ROM Checksum Error

Coil Integrated Module

14 (C0273)

Inoperative Isolation Item

Coil Integrated Module

14 (C0284)

Loop Time Overrun

Coil Integrated Module

15 (C0277)

Low Ignition Voltage

Wiring

15 (C0278)

High Ignition Voltage

Wiring

17 (C0269)

Excessive Dump Time

Coil Integrated Module

18 (C0274)

Excessive Isolation Time

Coil Integrated Module

21 (C0276)

"G" Sensor Failure

Coil Integrated Module

22 (C0281)

Brake Switch Failure

Coil Integrated Module

24 (C0282)

Open Or Shorted 4X4 Input Signal

Wiring

32 (C0267)

Open Motor Circuit Or Shorted ECU Output

Motor

32 (C0268)

Stalled Motor Or Open ECU Output

Wiring

35 (C0265)

Open Relay Circuit

Relay

35 (C0266)

Shorted Relay Circuit

Relay

41 (C0245)

Left Front Open Isolation Solenoid Or Shorted ECU Output

Solenoid

41 (C0247)

Left Front Shorted Isolation Solenoid Or Open ECU Output

Solenoid

42 (C0246)

Left Front Open Dump Solenoid Or Shorted ECU Output

Solenoid

42 (C0248)

Left Front Shorted Dump Solenoid Or Open ECU Output

Solenoid

43 (C0241)

Right Front Open Isolation Solenoid Or Shorted ECU Output

Solenoid

43 (C0243)

Right Front Shorted Isolation Solenoid Or Open ECU Output

Solenoid

44 (C0242)

Right Front Open Dump Solenoid Or Shorted ECU Output

Solenoid

44 (C0244)

Right Front Shorted Dump Solenoid Or Open ECU Output

Solenoid

45 (C0251)

Rear Open Isolation Solenoid Or Shorted ECU Output

Solenoid

45 (C0253)

Rear Shorted Isolation Solenoid Or Open ECU Output

Solenoid

46 (C0252)

Rear Open Dump Solenoid Or Shorted ECU Output

Solenoid

46 (C0254)

Rear Shorted Dump Solenoid Or Open ECU Output

Solenoid

51 (C0225)

Left Front Open Or Shorted Sensor

Sensor Or Wiring

52 (C0221)

Right Front Open Or Shorted Sensor

Sensor Or Wiring

53 (C0235)

Rear Open Or Shorted Sensor

Sensor Or Wiring

61 (C0226)

Left Front Missing Sensor Signal

Sensor Or Wiring

61 (C0227)

Left Front Sensor Signal Dropout

Sensor Or Wiring

62 (C0222)

Right Front Missing Sensor Signal

Sensor Or Wiring

62 (C0223)

Right Front Sensor Signal Dropout

Sensor Or Wiring

63 (C0236)

Rear Missing Sensor Signal

Sensor Or Wiring

63 (C0237)

Rear Sensor Signal Dropout

Sensor Or Wiring

64 (C0229)

Simultaneous Dropout Of Front Sensor Signals

Sensor Or Wiring

65 (C0238)

Wheel Speed Error

Vehicle Or Sensor

N/A (C0286)

Shorted Indicator Light

Wiring

⁽¹⁾	See DIAGNOSTIC TESTS .