Brake Control Warning Light Does Not Come ON

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: Brake Control Warning Light does not Come ON

Brake Control Warning Light does not Come ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.
If the ECU stores a DTC, the brake control warning light comes on in the combination meter.

WIRING DIAGRAM






INSPECTION PROCEDURE
NOTICE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization.

PROCEDURE

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






B -- INSPECT CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK BRAKE CONTROL WARNING LIGHT
(a) Connect Techstream to the DLC3.
(b) Turn the power switch on (READY).
(c) Select "ECB* Warning Lamp" in the Active Test and operate the brake control warning light using Techstream.

ABS / VSC / TRAC:





*: Electronically Controlled Brake
(d) Check that "ON" and "OFF" of the brake control warning light are indicated on the combination meter when using Techstream.
OK:
The brake control warning light turns on or off in accordance with Techstream.
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.

OK -- REPLACE SKID CONTROL ECU
NG -- Continue to next step.
3. INSPECT COMBINATION METER ASSEMBLY
(a) Turn the power switch off.
(b) Perform Active Test of the combination meter (meter CPU) using Techstream Scan Tool Testing and Procedures.
OK:
The brake control warning light turns on or off in accordance with Techstream.
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 -- REPLACE COMBINATION METER ASSEMBLY
OK -- REPLACE SKID CONTROL ECU