ABS Warning Light does not Come ON

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ABS Warning Light does not Come ON

ABS Warning Light does not Come ON

DESCRIPTION

The skid control ECU is connected to the combination meter via the CAN and multiplex communication systems.

WIRING DIAGRAM

Refer to ABS Warning Light Remains ON ABS Warning Light Remains ON.

INSPECTION PROCEDURE
NOTICE:
When replacing the skid control ECU, perform zero point calibration and store system information Vehicle Stability Control System.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM
(a) Check if a CAN communication system DTC is output Diagnosis System.
Result:






B -- INSPECT CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK MULTIPLEX COMMUNICATION SYSTEM
(a) Check if a multiplex communication system DTC is output Reading and Clearing Diagnostic Trouble Codes.
Result:






B -- INSPECT MULTIPLEX COMMUNICATION SYSTEM
A -- Continue to next step.
3. CHECK ABS WARNING LIGHT
(a) Disconnect the skid control ECU connectors.
(b) Turn the engine switch on (IG).
(c) Check that the ABS warning light comes on.
OK:
The ABS warning light comes on.
HINT:
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part Problem Symptoms Table.

NG -- INSPECT COMBINATION METER ASSEMBLY
OK -- REPLACE SKID CONTROL ECU
4. INSPECT COMBINATION METER ASSEMBLY
(a) Turn the engine switch off.
(b) Reconnect the skid control ECU connectors.
(c) Perform the Active Test of the combination meter (meter CPU) using the Techstream Scan Tool Testing and Procedures.
(d) Check the combination meter.
OK:
The ABS warning light turns on or off in accordance with the Techstream operation.
HINT:
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- REPLACE SKID CONTROL ECU