Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit sends the signal for the headlight cleaner control relay to operate the headlight cleaner motor and pump assembly. The signal is send when the headlight cleaner switch or the front washer switch is turned ON.
The headlight cleaner does not work while the multiplex network body computer sends the signal that the daytime running light system is in operation.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. INSPECT HEADLIGHT CLEANER CONTROL RELAY

1. Disconnect the connector from the headlight cleaner control relay.

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   H - Body ground	light control switch HEAD, headlight cleaner switch OFF → ON	Below 1 V → 10 to 14 V

NG	Go to step 4

OK

2. INSPECT HEADLIGHT CLEANER CONTROL RELAY

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   HDLO - Body ground	Engine idling, parking brake released, Light control switch OFF and shift in any position other than P position.	10 to 14 V

NG	Go to step 6

OK

3. INSPECT HEADLIGHT CLEANER CONTROL RELAY

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

   Standard resistance :

   Tester Connection	Condition	Specified Condition
   FRWA - Body ground	Front washer switch OFF → ON	10 kΩ or higher → Below 1 Ω

NG	Go to step 7

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

4. INSPECT HEADLIGHT CLEANER SWITCH ASSEMBLY

1. Disconnect the connector from the headlight cleaner switch.

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 → pushed	10 kΩ or higher → Below 1 Ω

NG	REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY

OK

5. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - INSTRUMENT PANEL J/B))

1. Disconnect the connector from the headlight cleaner control relay and instrument panel J/B.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   H - 1H-13	Headlight cleaner switch not pushed → pushed	10 kΩ or higher → Below 1 Ω
   H - Body ground	Always	10 kΩ or higher

   
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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

1. Disconnect the connector from the headlight cleaner and multiplex network body ECU.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   HDLO - HDLO	Always	Below 1 Ω
   HDLO - Body ground	Always	10 kΩ or higher

   
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

7. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

1. Inspect the windshield wiper switch assembly (Click here).

NG	REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR