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 Calibration.
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
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)
OK -- Continue to next step.
3. CHECK DTC (for 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 How to Proceed With Troubleshooting.
Result
B -- GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)
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
OK -- USE SIMULATION METHOD TO CHECK