Check Wiper Interlock Headlight System
Wiring diagram:
Front wiper and washer system Ref. to WIRING SYSTEM>FRONT WIPER AND WASHER SYSTEM>WIRING DIAGRAM
- AUTO HEADLIGHT SYSTEM CHECK
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- Turn the ignition switch to ON.
- Check the operation of auto headlight system.
Is the system normal?
Yes : Go to 2.
No : Check and repair the auto headlight system. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM>INSPECTION>CHECK HEADLIGHT SYSTEM
- CHECK LIGHT CONTROL SENSOR
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Using Subaru Select Monitor, display data of [Wiper Link Auto Light Setup] in [Customize] of [Body Control]. Ref. to BODY CONTROL (DIAGNOSTICS)>CUSTOMIZE
Is the setting [ON]?
Yes : Go to 3.
No : Turn the setting to [ON].
- CHECK DIAGNOSTIC TROUBLE CODE (DTC)
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- Turn the ignition switch to ON and wait for at least 10 seconds.
- Read DTCs of the following items using the Subaru Select Monitor. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)
- [Body Control]
- [Front Relay Control Module]
Is DTC displayed?
Yes : Perform the diagnosis for the displayed DTCs.
- [Body Control]: Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST
- [Front Relay Control Module]: Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST
No : Go to 4.
- CHECK FRONT RELAY CONTROL MODULE
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Using Subaru Select Monitor, display data of [F Wiper (RTN) Input] in [Data Monitor] of [Front Relay Control Module]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR
Does the display switch between [OFF] ←→ [ON] when the combination switch (wiper) is operated OFF ←→ INT/LO/HI?
Yes : Go to 5.
No : Go to 6.
- CHECK BODY INTEGRATED UNIT
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Using Subaru Select Monitor, display data of [Fr wiper input] in [Data Monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR
Does the display switch between [OFF] ←→ [ON] when the combination switch (wiper) is operated OFF ←→ INT/LO/HI?
Yes : Check the light control sensor, and then repair or replace it if defective. Ref. to LIGHTING SYSTEM>LIGHT CONTROL SENSOR
No : Check the body integrated unit and replace it if defective.
- Inspection: Ref. to BODY CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE
- Replacement: Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT
- CHECK FRONT RELAY CONTROL MODULE
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Measure the voltage between front relay control module connector and chassis ground.
Connector & terminal
(B68) No. 13 (+) - Chassis ground (-):
Does the voltage switch between OFF (less than 1 V) ←→ ON (9 - 16 V) when the combination switch (wiper) is operated OFF ←→ INT/LO/HI?
Yes : Check the front relay control module and replace it if defective.
- Inspection: Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE
- Replacement: Ref. to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE
No : Go to 7.
- CHECK HARNESS
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- Turn the ignition switch to OFF.
- Disconnect the connectors of front wiper motor and front relay control module.
- Check the harness between the front wiper motor and the front relay control module.
Connector & terminal
(B130) No. 1 - (B68) No. 13:
Is the resistance less than 10 Ω?
Yes : Go to 8.
No : Repair or replace the defective part.
- CHECK HARNESS
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Check the harness between the front wiper motor connector and the chassis ground.
Connector & terminal
(B130) No. 4 - Chassis ground:
Is the resistance less than 10 Ω?
Yes : Go to 9.
No : Repair or replace the defective part.
- CHECK FRONT WIPER MOTOR
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Check the continuity between front wiper motor terminals.
Connector & terminal
(B130) No. 1 - (B130) No. 5:
Is there continuity?
Yes : Check the front relay control module and replace it if defective.
- Inspection: Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE
- Replacement: Ref. to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE
No : Replace the front wiper motor. Ref. to WIPER AND WASHER SYSTEMS>FRONT WIPER MOTOR AND LINK