Brake Warning Light Does Not Come ON

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for BOSCH Made): 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 assembly via CAN communication.

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON Brake Warning Light Remains ON.

INSPECTION PROCEDURE

HINT
Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output Diagnosis System.

Result:





B -- INSPECT CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK BRAKE WARNING LIGHT

(a) Disconnect the skid control ECU connector.

(b) Turn the ignition switch on (IG).

(c) Check that the BRAKE warning light comes on.

OK:

The BRAKE warning light comes on.

(d) Connect the connector.

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
NG -- Continue to next step.

3. INSPECT COMBINATION METER ASSEMBLY

(a) Connect the Techstream to the DLC3.

(b) Perform "Active Test" of the combination meter assembly using the Techstream Meter / Gauge System.

(c) Check BRAKE warning light operation.

OK:

The BRAKE warning light turns on or off in accordance with the Techstream.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal