WIPER AND WASHER SYSTEM Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit detects the conditions of the headlight control rheostat.

The headlight cleaner control relay receives the following signals through the CAN line:

• Headlight control rheostat signal

• Headlight operating signal

• Daytime running light operating signal

• Front washer motor operating signal

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK MAIN BODY ECU (HDLC SIGNAL)

   
   

   1. 

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition L13-10 (HDLO) - Body ground Power switch ON (IG), headlight cleaner switch OFF Below 1 V L13-10 (HDLO) - Body ground Power switch ON (IG), headlight cleaner switch ON 11 to 14 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (LIGHT CONTROL RHEOSTAT - MAIN BODY ECU AND BODY GROUND) Click here

   OK

2. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - FRONT CONTROLLER)

   
   

   1. 

      Disconnect the A6 relay connector.

   2. Disconnect the A51 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition A6-2 (H) - A51-6 (H) Always Below 1 Ω A6-2 (H) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK FRONT CONTROLLER (H SIGNAL)

   
   

   1. 

      Reconnect the A51 front controller connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition A51-6 (H) - Body ground Power switch ON (IG), headlight cleaner switch OFF Below 1 V A51-6 (H) - Body ground Power switch ON (IG), headlight cleaner switch ON 11 to 14 V

   
   

   NG

   REPLACE FRONT CONTROLLER

   OK

   REPLACE HEADLIGHT CLEANER CONTROL RELAY

4. CHECK HARNESS AND CONNECTOR (LIGHT CONTROL RHEOSTAT - MAIN BODY ECU AND BODY GROUND)

   
   

   1. 

      Disconnect the L8 rheostat connector.

   2. Disconnect the L13 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition L8-2 (B) - L13-10 (HDLC) Always Below 1 Ω L8-2 (B) - Body ground 10 kΩ or higher L8-5 (E) - Body ground Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK LIGHT CONTROL RHEOSTAT (HEADLIGHT CLEANER SWITCH)

   
   

   1. 

      Reconnect the L8 rheostat connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition L8-2 (B) - L8-5 (E) Power switch ON (IG), headlight cleaner switch OFF Below 1 V L8-2 (B) - L8-5 (E) Power switch ON (IG), headlight cleaner switch ON 11 to 14 V

   
   

   NG

   REPLACE LIGHT CONTROL RHEOSTAT (HEADLIGHT CLEANER SWITCH) Click here

   OK

   REPLACE MAIN BODY ECU