Headlight Cleaner Motor and Relay Circuit [10/2014 - 09/2017]: Procedure

1. Read the Data List according to the display on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [10/2014 - 09/2017] 

   Body Electrical > HL AutoLeveling > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Front Window Washer Switch	Washer switch condition	ON/OFF	ON: Windshield wiper switch assembly (front washer switch) on OFF: Windshield wiper switch assembly (front washer switch) off	-

   Body Electrical > HL AutoLeveling > Data List 

   Tester Display
   Front Window Washer Switch

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  7

Result: 

OK 

See step  2

1. Remove the headlight cleaner control relay from the No. 2 engine room relay block.
2. Inspect the headlight cleaner control relay.

   Refer to ON-VEHICLE INSPECTION [10/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HEADLIGHT CLEANER CONTROL RELAY 

Result: 

OK 

See step  3

1. Remove the headlight cleaner control relay from the No. 2 engine room relay block.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   Headlight cleaner control relay terminal 1 - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the headlight cleaner control relay from the No. 2 engine room relay block.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to 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

Result: 

NG 

See step  8

Result: 

OK 

See step  5

1. Remove the headlight cleaner control relay from the No. 2 engine room relay block.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Headlight cleaner control relay terminal 5 - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Remove the headlight cleaner control relay from the No. 2 engine room relay block.
2. Disconnect the A20 headlight light control ECU sub-assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Headlight cleaner control relay terminal 2 - A20-7 (HLC)	Always	Below 1 Ω
   Headlight cleaner control relay terminal 2 or A20-7 (HLC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2014 - 09/2017] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A20 headlight light control ECU sub-assembly RH connector.
2. Disconnect the I124 windshield wiper switch assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A20-18 (FRWA) - I124-7 (WF)	Always	Below 1 Ω
   A20-18 (FRWA) or I124-7 (WF) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2014 - 09/2017] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A24-2 - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Disconnect the A24 headlight cleaner motor and pump assembly connector.
2. Inspect the headlight cleaner motor and pump assembly.

   Refer to INSPECTION [10/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY. Refer to  REMOVAL [10/2014 - ] 

Result: 

OK 

See step  10

1. Disconnect the A24 headlight cleaner motor and pump assembly connector.
2. Remove the headlight cleaner control relay from the No. 2 engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A24-1 - Headlight cleaner control relay terminal 3	Always	Below 1 Ω
   A24-1 or headlight cleaner control relay terminal 3 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR