Toyota Camry (XV70): Brake Warning Light (Yellow) Remains On
DESCRIPTION
This procedure is for troubleshooting when the brake warning light (yellow) remains on but no DTCs are output.
The skid control ECU (brake actuator assembly) controls the brake warning light (yellow) in the combination meter assembly via CAN communication.
PROCEDURE
| 1. |
CHECK VEHICLE CONTROL HISTORY (RoB) (ELECTRIC PARKING BRAKE SYSTEM) |
(a) Using the Techstream, check for Vehicle Control History (RoB).
Click here
Chassis > Brake > Utility|
Tester Display |
|---|
| Vehicle Control History (RoB) |
HINT:
If vehicle control history (RoB) is stored when the electric parking brake system is suspended, the brake warning light (yellow) illuminates.
|
Result | Proceed to |
|---|---|
|
There is no vehicle control history (RoB) for when the electric parking brake system was suspended. |
A |
| There is vehicle control history (RoB) for when the electric parking brake system was suspended. |
B |
| B |
.gif) | ERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY (RoB) NOTICE: After performing troubleshooting and repair regarding vehicle control history (RoB), clear the vehicle control history (RoB). |
|
.gif)
| 2. |
INSPECT COMBINATION METER ASSEMBLY (BRAKE WARNING LIGHT (YELLOW)) |
(a) Perform the Active Test of the combination meter assembly using the Techstream.
Click here
Body Electrical > Combination Meter > Active Test|
Tester Display |
|---|
| ECB Warning |
(b) Check the combination meter assembly.
OK:
The brake warning light (yellow) turns on or off in accordance with Techstream operation.
| OK | | REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) |
| NG | | INSPECT METER / GAUGE SYSTEM |
READ NEXT:
Electric Parking Brake System AUTO Function Circuit
DESCRIPTION The skid control ECU (brake actuator assembly) receives shift position signals from the ECM via CAN communication to control the electric parking brake system AUTO function (shift-linked f
Operation Method
OPERATION METHOD PROCEDURE 1. PRECAUTION
Click here 2. REMOVE REAR SEAT CUSHION ASSEMBLY
Click here
3. REMOVE REAR SEAT CUSHION LOCK HOOK
Click here
4. PARKING BRAKE FORCED RELEASE
SEE MORE:
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (RoB) DESCRIPTION
Vehicle Control History (RoB) is a function that captures and stores ECU data when triggered by specific vehicle behavior.
It may be possible to determine the cause of the malfunction by checking the vehicle history information and freeze frame dat
Components
COMPONENTS ILLUSTRATION
*1 NO. 2 PARKING BRAKE WIRE ASSEMBLY
*2 REAR DISC BRAKE ANTI-SQUEAL SHIM KIT
*3 REAR DISC BRAKE PAD
*4 REAR DISC BRAKE CYLINDER ASSEMBLY
*5 REAR NO. 1 DISC BRAKE ANTI-SQUEAL SHIM
*6 REAR NO. 2 DISC BRAKE ANTI-SQUEAL SHIM
