Brake Warning Light does not Come ON

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Brake Warning Light does not Come ON

Brake Warning Light does not Come ON

DESCRIPTION

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

WIRING DIAGRAM






INSPECTION PROCEDURE
NOTE: When replacing the brake actuator assembly, perform zero point calibration Programming and Relearning.

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 BRAKE WARNING LIGHT
(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to ON.
(c) Check that the brake warning light comes on.
OK:
The brake 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 BRAKE ACTUATOR ASSEMBLY
3. INSPECT COMBINATION METER ASSEMBLY
(a) Turn the ignition switch off.
(b) Reconnect the skid control ECU connector.
(c) Perform the Active Test of the combination meter (meter CPU) using the Techstream Meter / Gauge System.
(d) Check the combination meter.
OK:
The brake 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 BRAKE ACTUATOR ASSEMBLY