Toyota Camry (XV70): 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.
CAUTION / NOTICE / HINT
NOTICE:
- After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
Click here
.gif)
- After replacing or removing and installing a speed sensor rotor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
Click here
PROCEDURE
|
1. | PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Chassis / Brake / Utility / Signal Check.
(d) Using the Techstream, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.
Click here
|
Tester Display |
|---|
| Signal Check |
OK:
Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.
|
Result | Proceed to |
|---|---|
|
OK (for Front) | A |
|
OK (for Rear) | B |
|
NG | C |
NOTICE:
- When cleaning the front speed sensor, make sure to clean the installation hole before installation.
- Do not use parts cleaner when cleaning the front speed sensor rotor.
HINT:
The rear speed sensor and rear speed sensor rotor are incorporated into the rear axle hub and bearing assembly.
If the rear speed sensor and rear speed sensor rotor need to be replaced, replace the rear axle hub and bearing assembly.
| A |
.gif) | CLEAN FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR |
| B |
| REPLACE REAR AXLE HUB AND BEARING ASSEMBLY |
| C |
| INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT |
READ NEXT:
VSC does not Operate or VSC does not Operate Correctly
DESCRIPTION When TRAC or VSC is operating, the skid control ECU (brake actuator assembly) blinks the slip indicator light to inform the driver that slippage occurred.
When a communication malfunctio
Brake Actuator Operation Sound is Loud during Initial Check
CAUTION / NOTICE / HINT NOTICE: After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.
Click here
VSC OFF Switch Circuit
DESCRIPTION The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.
Pressing the VSC OFF switch turns off TRAC operation, and pressing an
SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
HINT: Using the Techstream to read the Data List allows the values or state
Removal
REMOVAL CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during rear drive shaft assembly removal/installation are shown below. Necessary Procedures After Parts Remo
