NO.1 NEITHER ABS WARNING LIGHT NOR BRAKE SYSTEM WARNING LIGHT ILLUMINATE WHEN IGNITION SWITCH TURNED TO ON POSITION


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1

ABS warning light and BRAKE system warning light do not illuminate when the ignition switch is turned to ON position.

[TROUBLESHOOTING HINTS]

• Malfunction of instrument cluster or ABS HU/CM

• Improper configuration (instrument cluster)

STEP

INSPECTION

ACTION

1
VERIFY WHETHER MALFUNCTION IS IN COMMON POWER SUPPLY OF WARNING LIGHTS AND INDICATOR LIGHTS, OR IN OTHER WARNING LIGHTS AND INDICATOR LIGHTS
• Do other warning and indicator lights illuminate when the ignition switch is turned to the ON position?
Yes
Go to step 4.
No
Go to the next step.
2
INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE
• Is the instrument cluster ignition power supply fuse normal?
Yes
Go to the next step.
No
Inspect for a short to ground on the circuit with the blown fuse.
Repair or replace if necessary.
Install appropriate amperage fuse.

*3

VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (INSPECT FOR CONTINUITY BETWEEN INSTRUMENT CLUSTER POWER SUPPLY AND INSTRUMENT CLUSTER) OR INSTRUMENT CLUSTER
• Turn the ignition switch to the ON position.
• Measure the voltage at instrument cluster connector (12-pin) terminal 1G.
• Is the voltage approx. 12 V?
Yes
Replace the instrument cluster (open circuit in instrument cluster).
No
Inspect for an open circuit between the instrument cluster and ground.
Repair or replace if necessary.
4
CONFIRM DTC U1900 USING M-MDS
• Retrieve DTCs from the PCM, ABS and instrument cluster.
• Is DTC U1900 retrieved?
Yes
Go to the next step.
No
Inspect the instrument cluster. If normal, go to Step 6.
5
CONFIRM DTCS U0121, U0100 AND U0214 USING M-MDS:
• Retrieve DTCs from the instrument cluster.
• Are DTCs U0121, U0100 and U0214 retrieved?
Yes
Replace the instrument cluster (open circuit in instrument cluster).
No
Inspect network communication for related system malfunction.
Repair or replace if necessary.
6
CONFIRM DTC B2477 FOR INSTRUMENT CLUSTER USING M-MDS
• Is DTC B2477 retrieved?
Yes
Perform instrument cluster configuration.
No
Replace the ABS HU/CM.

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