Lexus ES: Brake Warning Light does not Come ON
DESCRIPTION
The skid control ECU (brake actuator assembly) controls the brake warning light / red (malfunction) in the combination meter assembly via CAN communication.
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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PROCEDURE
| 1. | INSPECT COMBINATION METER ASSEMBLY |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(d) Perform the Active Test of the combination meter assembly using the Techstream.
Click here
| Tester Display |
|---|
| Brake Warning |
(e) Check the combination meter assembly.
OK:
The brake warning light / red (malfunction) turns on or off in accordance with Techstream operation.
| OK |  | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | INSPECT METER / GAUGE SYSTEM |
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DESCRIPTION This procedure is for troubleshooting when the brake warning light / red (malfunction) remains on but no DTCs are output. The skid control ECU (brake actuator assembly) controls the brake
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Right Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12BB12,...,C12C649)
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SEE MORE:
Components
COMPONENTS ILLUSTRATION *A for HV Model *B for Gasoline Model *1 REAR DOOR SCUFF PLATE LH *2 REAR DOOR SCUFF PLATE RH *3 REAR SEAT SIDE GARNISH LH *4 REAR SEAT SIDE GARNISH RH *5 ROOF SIDE INNER GARNISH ASSEMBLY LH *6 ROOF SIDE INNER GARNISH ASSEMBLY RH *7
Components
COMPONENTS ILLUSTRATION *1 COWL SIDE TRIM BOARD LH *2 FRONT DOOR OPENING TRIM COVER LH *3 FRONT DOOR SCUFF PLATE LH *4 FUEL LID OPENER SWITCH (TRUNK AND FUEL SWITCH ASSEMBLY) *5 INSTRUMENT SIDE PANEL LH *6 LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY *7 NO. 1
