WIPER AND WASHER SYSTEM (w/ Rain Sensor) Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit detects the conditions of the headlight cleaner switch.

The headlight cleaner control relay receives the following signals:

• Headlight cleaner switch signal

• Headlight operating signal*

• Front washer motor operating signal*

*: for HID Headlight

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT HEADLIGHT CLEANER SWITCH ASSEMBLY

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Headlight Cleaner Switch)

      for LHD:

      Remove the headlight cleaner switch Click here.

   2. for RHD:

      Remove the headlight cleaner switch Click here.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition 8 (B) - 5 (L) Headlight cleaner switch off 10 kΩ or higher 8 (B) - 5 (L) Headlight cleaner switch on Below 1 Ω

      Result

      Result	Proceed to
      OK	A
      NG (for LHD)	B
      NG (for RHD)	C

   
   

   B

   REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY Click here

   C

   REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY Click here

   A

2. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER SWITCH - HEADLIGHT CLEANER CONTROL RELAY AND MAIN BODY ECU)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Headlight Cleaner Control Relay)
      *2	Front view of wire harness connector (to Headlight Cleaner Switch)
      *3	Front view of wire harness connector (to Main Body ECU)

      Disconnect the A35 relay connector.

   2. Disconnect the D62 switch connector.

   3. Disconnect the D79 ECU connector.

   4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition A35-2 (H) - D62-8 (B) Always Below 1 Ω D62-5 (L) - D79-20 (HRLY) A35-2 (H) - Body ground Always 10 kΩ or higher D62-8 (B) - Body ground D62-5 (L) - Body ground D79-20 (HRLY) - Body ground

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HEADLIGHT TYPE

   
   

   1. Check the headlight type.

      Result

      Result	Proceed to
      for HID Headlight	A
      for Halogen Headlight	B

   
   

   B

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   A

4. CHECK HARNESS AND CONNECTOR (HOLD SIGNAL)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Headlight Cleaner Control Relay)

      Disconnect the A35 relay connector.

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition A35-1 (HDLO) - Body ground Ignition switch ON, headlights (LO) not operating Below 1 V A35-1 (HDLO) - Body ground Ignition switch ON, headlights (LO) operating 11 to 14 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - MAIN BODY ECU) Click here

   OK

5. CHECK HEADLIGHT CLEANER CONTROL RELAY (FRWA SIGNAL)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Headlight Cleaner Control Relay)

      Disconnect the A35 relay connector.

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition A35-5 (FRWA) - Body ground Ignition switch ON, front washer stopped 11 to 14 V A35-5 (FRWA) - Body ground Ignition switch ON, front washer operating Below 1 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - WINDSHIELD WIPER SWITCH) Click here

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

6. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - MAIN BODY ECU)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Headlight Cleaner Control Relay)
      *2	Front view of wire harness connector (to Main Body ECU)

      Disconnect the A35 relay connector.

   2. Disconnect the D81 ECU connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition A35-1 (HDLO) - D81-19 (HDLO) Always Below 1 Ω A35-1 (HDLO) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

7. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - WINDSHIELD WIPER SWITCH)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Headlight Cleaner Control Relay)
      *2	Front view of wire harness connector (to Windshield Wiper Switch)

      Disconnect the A35 relay connector.

   2. Disconnect the D34 switch connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition A35-5 (FRWA) - D34-3 (WF) Always Below 1 Ω A35-5 (FRWA) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here