#
NO.1 ABS WARNING LIGHT, BRAKE SYSTEM WARNING LIGHT, TCS OFF LIGHT DO NOT ILLUMINATE WITH IGNITION SWITCH ON

id040300900800

Vehicle with ABS

1 | ABS warning light, BRAKE system warning light TCS OFF light do not illuminate with ignition switch on.
[TROUBLESHOOTING HINTS] • Warning light circuit and indicator light circuit open or shorted to ground.

STEP | INSPECTION | ACTION
--- | --- | ---
1 | VERIFY WHETHER MALFUNCTION IS IN WARNING LIGHTS AND INDICATOR LIGHTS' COMMON POWER SUPPLY, OR IN OTHER WARNING LIGHTS AND INDICATOR LIGHTS • Do other warning and indicator lights illuminate when IG switch is turned ON? | Yes | Go to step 4.
No | Go to next step.
2 | INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE • Is instrument cluster ignition power supply fuse normal? | Yes | Go to next step.
No | Check for a short to ground on blown fuse's circuit. Repair or replace as necessary. Install appropriate amperage fuse.
*3 | VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER POWER SUPPLY AND INSTRUMENT CLUSTER FOR CONTINUITY) OR INSTRUMENT CLUSTER • Turn ignition switch ON. • Measure voltage at instrument cluster connector (24-pin) terminal 2V. • Is voltage approx. 12 V? | Yes | Replace instrument cluster (open circuit in instrument cluster).
No | Inspect for open circuit between instrument cluster and ground. Repair or replace as necessary.
4 | CONFIRM DTC U1900 USING WDS OR EQUIVALENT • Retrieve DTC from PCM, ABS (ABS/TCS), and instrument cluster. • Is DTC U1900 retrieved? | Yes | Go to next step.
No | Inspect instrument cluster. If OK, then go to step 6.
5 | CONFIRM THE FOLLOWING PIDs USING WDS OR EQUIVALENT • ABS_MSG • PCM_MSG • Is "not present'' massage displayed on WDS or equivalent? | Yes | Replace instrument cluster (open circuit in instrument cluster).
No | Network communication, for related system is malfunction. Repair or replace as necessary.
6 | CONFIRM DTC B2477 FOR INSTRUMENT CLUSTER USING WDS OR EQUIVALENT • Retrieve DTC from PCM, ABS, and instrument cluster. • Is DTC B2477 retrieved? | Yes | Re-configure the instrument cluster.
No | Replace ABS HU/CM.

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.