WIPER AND WASHER SYSTEM (w/ Rain Sensor) > Front Wiper Motor Circuit

for Preparation Click here


DESCRIPTION

The windshield wiper relay assembly controls the windshield wiper motor assembly.

WIRING DIAGRAM


E177643E01


E177643E02


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

  1. Remove the windshield wiper motor assembly (Click here).



    E144461E32

  1. Check LO operation (for LHD).

    1. Connect a battery positive (+) lead to terminal 1 (+1) and a negative (-) lead to terminal 5 (E), and check that the motor operates at low speed (LO).

      OK:
      Motor operates at low speed (LO).

  1. Check HI operation.

    1. Connect a battery positive (+) lead to terminal 4 (+2) and a negative (-) lead to terminal 5 (E), and check that the motor operates at high speed (HI).

      OK:
      Motor operates at high speed (HI).

      Text in Illustration 
      *1
      		for LHD
      *2
      		Component without harness connected
      (Windshield Wiper Motor Assembly)



    E144461E30

  1. Check LO operation (for RHD).

    1. Connect a battery positive (+) lead to terminal 5 (+1) and a negative (-) lead to terminal 4 (E), and check that the motor operates at low speed (LO).

      OK:
      Motor operates at low speed (LO).

  1. Check HI operation.

    1. Connect a battery positive (+) lead to terminal 3 (+2) and a negative (-) lead to terminal 4 (E), and check that the motor operates at high speed (HI).

      OK:
      Motor operates at high speed (HI).

      Text in Illustration 
      *1
      		for RHD
      *2
      		Component without harness connected
      (Windshield Wiper Motor Assembly)



NG
REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY (Click here)
OK


2.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - BATTERY AND BODY GROUND)


    E144463E08

  1. for LHD

    1. Disconnect the A20 windshield wiper motor connector.

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

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      A20-2 (B) - Body ground
      		Engine switch on (IG)
      		11 to 14 V

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A20-5 (E) - Body ground
      		Always
      		Below 1 Ω

      Text in Illustration 
      *1
      		for LHD
      *2
      		Front view of wire harness connector
      (to Windshield Wiper Motor Assembly)



    E144463E07

  1. for RHD

    1. Disconnect the A20 windshield wiper motor connector.

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

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      A20-2 (B) - Body ground
      		Engine switch on (IG)
      		11 to 14 V

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A20-4 (E) - Body ground
      		Always
      		Below 1 Ω

      Text in Illustration 
      *1
      		for RHD
      *2
      		Front view of wire harness connector
      (to Windshield Wiper Motor Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR - WINDSHIELD WIPER RELAY)


    E144462E07

  1. for LHD

    1. Disconnect the D41 windshield wiper relay assembly connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A20-1 (+1) - D41-2 (+1)
      		Always
      		Below 1 Ω
      A20-1 (+1) - Body ground
      		Always
      		10 kΩ or higher
      A20-4 (+2) - D41-3 (+2)
      		Always
      		Below 1 Ω
      A20-4 (+2) - Body ground
      		Always
      		10 kΩ or higher
      A20-3 (+S) - D41-10 (+SM)
      		Always
      		Below 1 Ω
      A20-3 (+S) - Body ground
      		Always
      		10 kΩ or higher

      Text in Illustration 
      *1
      		for LHD
      *2
      		Front view of wire harness connector
      (to Windshield Wiper Motor Assembly)
      *3
      		Front view of wire harness connector
      (to Windshield Wiper Relay Assembly)



    E144462E08

  1. for RHD

    1. Disconnect the D41 windshield wiper relay assembly connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A20-5 (+1) - D41-2 (+1)
      		Always
      		Below 1 Ω
      A20-5 (+1) - Body ground
      		Always
      		10 kΩ or higher
      A20-3 (+2) - D41-3 (+2)
      		Always
      		Below 1 Ω
      A20-3 (+2) - Body ground
      		Always
      		10 kΩ or higher
      A20-1 (+S) - D41-10 (+SM)
      		Always
      		Below 1 Ω
      A20-1 (+S) - Body ground
      		Always
      		10 kΩ or higher

      Text in Illustration 
      *1
      		For RHD
      *2
      		Front view of wire harness connector
      (to Windshield Wiper Motor Assembly)
      *3
      		Front view of wire harness connector
      (to Windshield Wiper Relay Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)