Diagnosis Procedure
- CHECK FRONT WIPER MOTOR (LO) INPUT VOLTAGE
- Turn ignition switch OFF, and wait for 20 seconds or more.
- Disconnect front wiper motor connector.
- Turn ignition switch ON, and wait for 10 seconds.
- Check voltage between front wiper motor harness connector and ground.
(+)
(-)
Voltage (Approx.)
Front wiper motor
Connector
Terminal
E42
3
Ground
Battery voltage
(10 seconds)*
*: According to front wiper protection function, IPDM E/R supplies voltage for 10 seconds (battery voltage) and then stops for 20 seconds (0 V). This operations repeats 5 times, and then IPDM E/R stops voltage supply. To perform the check again, turn ignition switch OFF, wait for 20 seconds or more, and then perform the check.
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK FRONT WIPER MOTOR (LO) CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R connector.
- Check continuity between IPDM E/R harness connector and front wiper motor harness connector.
IPDM E/R
Front wiper motor
Continuity
Connector
Terminal
Connector
Terminal
E7
54
E42
3
Existed
- Check continuity between IPDM E/R harness connector and ground.
IPDM E/R
Ground
Continuity
Connector
Terminal
E7
54
Not existed
Is the inspection result normal?
YES
Replace IPDM E/R.
NO
Repair or replace harness.
- CHECK FRONT WIPER MOTOR (LO) GROUND CIRCUIT
- Turn ignition switch OFF.
- Remove wiper reverse relay.
- Check continuity between wiper reverse relay harness connector and ground.
Wiper reverse relay
Ground
Continuity
Connector
Terminal
E44
4
Existed
Is the inspection result normal?
YES
Replace front wiper motor.
NO
Repair or replace harness.