Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit detects the conditions (on or off) of the headlight cleaner switch.
The headlight cleaner control relay receives the following signals:

1. Headlight cleaner switch signal
   
2. Headlight operating signal
   
3. Daytime running light operating signal
   
4. Front washer motor operating signal
   

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) (HDLO SIGNAL)

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   A36-4 (HDLO) - Body ground	Engine switch on (IG) and light control switch OFF	10 to 14 V
   A36-4 (HDLO) - Body ground	Engine switch on (IG) and light control switch in HEAD position	Below 1 V

NG	Go to step 5

OK

2. INSPECT FRONT CONTROLLER (ENGINE ROOM NO. 2 J/B) (FRWA SIGNAL)

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   2F-8 (FRWA) - Body ground	Engine switch on (IG) and front washer is stopped	10 to 14 V
   2F-8 (FRWA) - Body ground	Engine switch on (IG) and front washer is operated	Below 1 V

NG	Go to step 6

OK

3. CHECK HEADLIGHT CLEANER SWITCH ASSEMBLY

1. Disconnect the connector from the headlight cleaner switch assembly.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   4 - 3	Headlight cleaner switch not pushed	10 kΩ or higher
   4 - 3	Headlight cleaner switch pushed	Below 1 Ω

NG	REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY

OK

4. CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) (HRLY SIGNAL)

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   RL-7 (HRLY) - Body ground	Engine switch on (IG) and headlight cleaner switch OFF	Below 1 V
   RL-7 (HRLY) - Body ground	Engine switch on (IG) and headlight cleaner switch ON	10 to 14 V

NG	Go to step 7

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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

1. Disconnect the A3 headlight cleaner control relay connector.

2. Disconnect the A36 main body ECU RH (cowl side J/B RH) connector.

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

   Standard resistance:

   Tester Connector	Condition	Specified Condition
   A3-1 (HDLO) - A36-1 (HDLO)	Always	Below 1 Ω
   A3-1 (HDLO) - Body ground	Always	10 k Ω or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - MAIN BODY ECU RH)

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU RH (COWL SIDE J/B RH) - BATTERY)

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

1. Disconnect the 2F front controller (engine room No. 2 J/B) connector.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   A3-5 (FRWA) - 2F-8 (FRWA)	Always	Below 1 Ω
   A3-5 (FRWA) - Body ground	Always	10 k Ω or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - FRONT CONTROLLER)

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT CONTROLLER (OVERHEAD J/B) - BATTERY)

7. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - MAIN BODY ECU RH)

1. Disconnect the J13 headlight cleaner switch assembly connector.

2. Disconnect the RL main body ECU RH (cowl side J/B RH) connector.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   J13-4 (L) - RL-7 (HRLY)	Always	Below 1 Ω
   RL-7 (HRLY) - Body ground	Always	10 k Ω or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - MAIN BODY ECU RH)

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU RH (COWL SIDE J/B RH) - BATTERY)