Toyota Camry owners & service manuals

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

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).

A

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

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