Lexus ES manuals

Lexus ES: ABS does not Operate

DESCRIPTION

When the electronically controlled brake system is operating, as the input piston and output piston are not directly connected, the kickback of the brake pedal is minimal during ABS operation and the driver may not notice that ABS operated.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

PROCEDURE

1.

BRAKE PROBLEM CHECK

(a) Check if the slip indicator light was illuminated or blinking when ABS did not operate.

HINT:

  • When the VSC system is normal and ABS is operating, the slip indicator light blinks.
  • When the VSC system is malfunctioning, the slip indicator light illuminates.

Result

Proceed to

The slip indicator light was blinking.

A

The slip indicator light was illuminated.

B

A

END

B

2.

CHECK DTC AND FREEZE FRAME DATA

(a) Using the Techstream, check DTCs and Freeze Frame Data.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A

3.

PERFORM OPERATION CHECK DRIVING

(a) Check that ABS operates using a drum tester or equivalent.

CAUTION:

When using a drum tester, enter Inspection Mode or VSC off mode and perform inspection with the TRAC and VSC systems disabled to prevent the vehicle from moving suddenly due to TRAC or VSC operation.

Click here

OK:

ABS operates.

OK

END

NG

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

READ NEXT:

 ABS Operates Before Necessary When Braking

DESCRIPTION Troubleshooting for when ABS operates too soon due to a noisy signal from the speed sensor, a difference in output, etc. PROCEDURE 1. PERFORM TEST MODE (SIGNAL CHECK) INSPECTION (SPE

 ABS Warning Light does not Come ON

DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication. CAUTION / NOTICE / HINT NOTICE: After replacing the

 ABS Warning Light Remains ON

DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication. If any of the following is detected, the ABS warnin

SEE MORE:

 Generator Temperature Sensor Voltage Out of Range (P0A361C,P0A361F)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs are stored when the generator temperature sensor output is abnormal. The cause of this malfunction may be one of the following: Generator temperature sensor malfunction Internal generator temperature sensor malfunction Open or short in generator te

 Installation

INSTALLATION PROCEDURE 1. INSTALL SUSPENSION TOWER DAMPER (a) Install the suspension tower damper to the front bumper extension sub-assembly LH and front bumper extension sub-assembly RH with the 4 bolts. Torque: 27.5 N·m {280 kgf·cm, 20 ft·lbf} NOTICE: Do not extend or compress the damper. 2. I

© 2016-2024 Copyright www.lexguide.net