Toyota Corolla Cross: 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 DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK) |
(a) Using the GTS, 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 .gif)
|
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 and for 2WD) |
B |
|
OK (for Rear and for AWD) |
C |
|
NG |
D |
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 |
|
CLEAN REAR SPEED SENSOR AND REAR SPEED SENSOR ROTOR |
| D |
|
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 malfunct
Brake Actuator Operation Sound is Loud during Initial Check
PROCEDURE
1.
PERFORM ROAD TEST
(a) After turning the ignition switch to ON, compare the operating
sound of the brake actuator the first time the vehicle speed reach
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 (combination switch assembly) turns
o
SEE MORE:
Reassembly
REASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (REASSEMBLY)
Procedure Part Name Code
1 NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY
87050E
- -
2 BLOWER MOTOR WITH FAN SUB-ASSEMBLY
87103K -
- -
Inspection
INSPECTION
PROCEDURE
1. INSPECT TRANSMISSION REVOLUTION SENSOR (NT)
(a) Connect the battery to the transmission revolution sensor (NT) as shown in
the illustration.
*1
Battery
*2
Ammeter
*a
Component without harness conn
