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 BRAKE warning light comes on when brake fluid is insufficient, the parking brake is applied or the EBD is defective.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the master cylinder solenoid, perform zero point calibration Programming and Relearning.

PROCEDURE

1. INSPECT BRAKE WARNING LIGHT

(a) Disconnect the A24 skid control ECU connector.

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

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

OK:

BRAKE warning light comes on.

NG -- CHECK CAN COMMUNICATION LINE

OK -- REPLACE MASTER CYLINDER SOLENOID Disassembly

2. CHECK CAN COMMUNICATION LINE

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

OK:

"CAN Bus Check" indicates no malfunctions in CAN communication.

NG -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Initial Inspection and Diagnostic Overview
OK -- Continue to next step.

3. CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Check for DTCs Initial Inspection and Diagnostic Overview.

Result





B -- GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) CAN Communication System
A -- Continue to next step.

4. CHECK OPERATION OF BRAKE WARNING LIGHT (ACTIVE TEST)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Check the condition of the brake warning light by operating the Techstream.

Combination Meter





OK:

The warning light turns on when operating the Techstream.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting