WIPER AND WASHER SYSTEM Headlight Cleaner Motor and Relay Circuit

DESCRIPTION

The headlight cleaner motor and pump assembly is controlled by the headlight ECU sub-assembly RH. When the headlight ECU sub-assembly RH receives the washer switch operation signal 5 times with the low beam headlights on, it operates the H-LP CLN relay once.

WIRING DIAGRAM

1. for Wiper Switch RH Side Type:

   

2. for Wiper Switch LH Side Type:

   

CAUTION / NOTICE / HINT

PROCEDURE

1. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / (desired system) / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > AFS > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Headlight Cleaner	Function to operate the headlight cleaner motor	OFF/ON	*

      
      

      • *: for Triple Beam Headlight

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Headlight Cleaner	Function to operate the headlight cleaner motor	OFF/ON	*

      
      

      • *: for Single Beam Headlight

      
      Body Electrical > AFS > Active Test

      Tester Display
      Headlight Cleaner

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Headlight Cleaner

      OK
      Headlight cleaner motor and pump assembly is normal.

      Result
      Proceed to OK NG

   
   

   NG

   INSPECT H-LP CLN RELAY Click here

   OK

2. READ VALUE USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / (desired system) / Data List.

   5. Read the Data List according to the display on the GTS.

      
      Body Electrical > AFS > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Front Window Washer Switch	Washer switch ON position signal	ON or OFF	ON: Washer switch in ON position OFF: Washer switch not in ON position	*

      
      

      • *: for Triple Beam Headlight

      
      Body Electrical > HL AutoLeveling > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Front Window Washer Switch	Washer switch ON position signal	ON or OFF	ON: Washer switch in ON position OFF: Washer switch not in ON position	*

      
      

      • *: for Single Beam Headlight

      
      Body Electrical > AFS > Data List

      Tester Display
      Front Window Washer Switch

      
      Body Electrical > HL AutoLeveling > Data List

      Tester Display
      Front Window Washer Switch

      OK
      The GTS display changes correctly in response to the front washer switch operation.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

   NG

3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY)

   
   

   1. Disconnect the A50 headlight ECU sub-assembly RH connector.

   2. Disconnect the J33 windshield wiper switch assembly connector.

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

      Standard Resistance
      for Wiper Switch RH Side Type Tester Connection Condition Specified Condition A50-18 (FRWA) - J33-7 (WF) Always Below 1 Ω A50-18 (FRWA) or J33-7 (WF) - Body ground Always 10 kΩ or higher
      for Wiper Switch LH Side Type Tester Connection Condition Specified Condition A50-18 (FRWA) - J33-4 (WF) Always Below 1 Ω A50-18 (FRWA) or J33-4 (WF) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

4. INSPECT H-LP CLN RELAY

   
   

   1. Remove the H-LP CLN relay.

   2. Inspect the H-LP CLN relay.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE H-LP CLN RELAY

   OK

5. CHECK HARNESS AND CONNECTOR (H-LP CLN RELAY - POWER SOURCE)

   
   
   1. 

      *a	Front view of wire harness connector (to H-LP CLN relay)

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

      Standard Voltage
      Tester Connection Condition Specified Condition 1 - Body ground Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY CIRCUIT)

   
   
   1. 

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

      Remove the headlight cleaner control relay.

   2. Using a service wire, connect terminal 3 and body ground.

      Note

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

   3. Check the headlight cleaner motor and pump assembly operate.

      OK
      Headlight cleaner motor and pump assembly operate.

      Result
      Proceed to OK NG

   
   

   NG

   CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY - POWER SOURCE) Click here

   OK

7. CHECK HARNESS AND CONNECTOR (H-LP CLN RELAY - BODY GROUND)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition 5 - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. CHECK HARNESS AND CONNECTOR (H-LP CLN RELAY - HEADLIGHT ECU SUB-ASSEMBLY RH)

   
   

   1. Disconnect the A50 headlight ECU sub-assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 2 - A50-7 (HLC) Always Below 1 Ω 2 or A50-7 (HLC) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

9. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY - POWER SOURCE)

   
   
   1. 

      *a	Front view of wire harness connector (to Headlight Cleaner Motor and Pump Assembly)

      Disconnect the A27 headlight cleaner motor and pump assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition A27-2 - Body ground Always 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. INSPECT HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY

    
    

    1. Inspect the headlight cleaner motor and pump assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY Click here

    OK

11. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY - H-LP CLN RELAY)

    
    

    1. Disconnect the A27 headlight cleaner motor and pump assembly connector.

    2. Remove the H-LP CLN relay.

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

       Standard Resistance
       Tester Connection Condition Specified Condition A27-1 - 3 Always Below 1 Ω A27-1 or 3 - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR