Power Source Circuit

DESCRIPTION

This circuit provides power to operate the windshield wiper relay assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. INSPECT FUSE

1. Inspect the AM1, FR WIP, ECU-B and INP-J/B fuses.

   1. Measure the resistance between each terminal.

      Standard resistance:

      Below 1Ω
      

NG	CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FAILURE FUSE

OK

2. INSPECT RELAY

1. Inspect IG1 relay continuity.

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

      Standard resistance:

      Terminal No.	Specified Condition
      3 - 5	10 kΩ or higher
      	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

NG	REPLACE RELAY

OK

3. CHECK HARNESS AND CONNECTOR (AUTO WIPER ECU - BODY GROUND)

1. Disconnect the connector from the auto wiper ECU.

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

   Standard resistance:

   Tester Connecting	Condition	Specified Condition
   E - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. INSPECT WINDSHIELD WIPER RELAY ASSEMBLY (POWER SOURCE CIRCUIT)

1. Disconnect the connector from the auto wiper ECU.

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   +B - Body ground	Always	10 to 14V

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5. INSPECT WINDSHIELD WIPER RELAY ASSEMBLY

1. Disconnect the connector from the auto wiper ECU.

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

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   WIG - Body ground	Ignition Switch OFF → ON	Below 1 V → 10 to 14 V

NG	Go to step 6

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

6. INSPECT IGNITION SWITCH

1. Disconnect the connector from the ignition switch.

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

   Standard resistance:

   Tester connection	Condition	Specified value
   AM1 - IG1	Ignition switch OFF→ON	10 kΩ or higher → Below 1 Ω

NG	REPLACE IGNITION SWITCH

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR