Diagnostic Procedure 12 (Unexpected pedal
action)
CHECK BRAKE PEDAL STROKE.
Check brake pedal stroke. Is stroke exces-
sively large?
No
E
Yes
Perform Preliminary
Check, refer to BR-65.
CHECK BRAKE PERFORMANCE
Disconnect ABS actuator and electric unit
connector and check whether brake is
effective.
Yes
E
No
Perform Preliminary Check,
refer to BR-65.
CHECK WARNING LAMP ACTIVATE.
Ensure warning lamp remains off while
driving.
OK
E
NG
Carry out self-diagnosis.
Refer to BR-59.
CHECK WHEEL SENSOR.
1. Check wheel sensor connector for ter-
minal damage or loose connection.
2. Perform wheel sensor mechanical
check.
Refer to Diagnostic Procedure 4,
BR-73.
OK
E
NG
Repair.
CHECK HARNESS CONNECTOR.
Check ABS actuator and electric unit pin
terminals for damage or the connection of
ABS actuator and electric unit harness
connector.
Reconnect ABS actuator and electric unit
harness connector. Then retest.
CAUTION:
Drive at low speed and brake smoothly to prevent
rear wheels locking.
SBR540A
YBR279
H
H
H
H
TROUBLE DIAGNOSES
BR-81