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 .gif)
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 | .gif) | END |
|
.gif)
| 2. | CHECK DTC AND FREEZE FRAME DATA |
(a) Using the Techstream, check DTCs and Freeze Frame Data.
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| B | | REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
| 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:
Before Starting Adjustment
BEFORE STARTING ADJUSTMENT CAUTION / NOTICE / HINT NOTICE: When replacing the windshield glass of a vehicle equipped with a forward recognition camera, make sure to use a Lexus genuine part. If a non-Lexus genuine part is used, the forward recognition camera may not be able to be installed due to a
Luggage Compartment Door Closer does not Operate
DESCRIPTION The luggage compartment door closer operation controls the luggage door closer assembly via the luggage closer motor assembly based on switch signals in the luggage door closer assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Check that B2250 or B2251 is not output before pro
