Headlight Cleaner Switch Circuit: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 → See step   5 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

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

NG → See step   6 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 → See step   7 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Disconnect the A3 headlight cleaner control relay connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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) - A36-4 (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) 

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.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A3-5 (FRWA) - 2F-8	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) 

1. Disconnect the J13 headlight cleaner switch assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 - 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)