NO.2 NEITHER ABS WARNING LIGHT NOR BRAKE SYSTEM WARNING LIGHT ILLUMINATE WITH SWITCH THE IGNITION TO ON [ABS]


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2
Neither ABS warning light nor BRAKE system warning light illuminate with switch the ignition to on.
[TROUBLESHOOTING HINTS]
•  Malfunction of instrument cluster or ABS HU/CM
•  Improper configuration (instrument cluster)

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY WHERE MALFUNCTION IS IN WARNING LIGHTS AND INDICATOR LIGHTS’ COMMON POWER SUPPLY, OR IN OTHER WARNING LIGHTS AND INDICATOR LIGHTS
•  Connect the M-MDS to DLC-2.
•  Turn on all warning lights and indicator lights using the instrument cluster PID WL+IL of active command modes.
•  Do other warning and indicator lights illuminate?
Yes
Go to Step 4.
No
If communication error message is displayed on M-MDS screen, go to the next step.
If communication error message is not displayed, replace the instrument cluster.
2
INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE
•  Is instrument cluster ignition power supply fuse normal?
Yes
Go to the next step.
No
Inspect 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 ELSEWHERE
•  Switch the ignition to ON.
•  Measure voltage at instrument cluster connector (24-pin) terminal 2V.
•  Is voltage approx. 12 V?
Yes
Go to the next step.
No
Inspect for open circuit between instrument cluster and ignition.
Repair or replace as necessary.
*4
VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER AND GND FOR CONTINUITY) OR INSTRUMENT CLUSTER
•  Switch the ignition to off.
•  Disconnect the instrument cluster.
•  Verify continuity between the instrument cluster harness-side connector terminal 2B and GND.
•  Is there continuity?
Yes
Replace the instrument cluster. (open circuit in instrument cluster)
No
Repair or replace malfunctioning part for open circuit and poor contact in GND point.
5
CONFIRM INSTRUMENT CLUSTER AND ABS HU/CM DTC
•  Retrieve the instrument cluster and ABS HU/CM DTC using the M-MDS.
•  Is there any DTC retrieved?
Yes
Perform the applicable DTC troubleshooting procedure.
No
Replace the instrument cluster.

•  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.