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.
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- 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.
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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.
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|
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 |
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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.
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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:
Tire information
Typical tire symbols
Full-size tire
Compact spare tire
Tire size
Summer tires or all season tires
An all season tire has "M+S" on the sidewall. A tire not marked "M+S"
is a summer tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly put into the
Reassembly
REASSEMBLY PROCEDURE 1. INSTALL RING PIN
(a) Install the 2 ring pins to the front oil pump cover sub-assembly.
2. INSTALL FRONT OIL PUMP BODY
(a) Install the front oil pump body to the front oil pump cover sub-assembly.
3. INSTALL FRONT OIL PUMP
