Power Source Circuit

WIPER AND WASHER SYSTEM: Power Source Circuit

Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE
(a) Inspect the AM1, FR WIP, ECU-B and INP-J/B fuses.
(1) Measure the resistance between each terminal.
Standard resistance:
Below 1Ohms
NG -- CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FAILURE FUSE
OK -- Continue to next step.
2. INSPECT RELAY





(a) Inspect IG1 relay continuity.
(1) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE RELAY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (AUTO WIPER ECU - BODY GROUND)





(a) Disconnect the connector from the auto wiper ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT WINDSHIELD WIPER RELAY ASSEMBLY (POWER SOURCE CIRCUIT)





(a) Disconnect the connector from the auto wiper ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT WINDSHIELD WIPER RELAY ASSEMBLY





(a) Disconnect the connector from the auto wiper ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- INSPECT IGNITION SWITCH
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
6. INSPECT IGNITION SWITCH





(a) Disconnect the connector from the ignition switch.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE IGNITION SWITCH
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR