Wiper and Washer Switch Circuit

WIPER / WASHER: WIPER AND WASHER SYSTEM: Wiper and Washer Switch Circuit
- Wiper and Washer Switch Circuit

DESCRIPTION

* The manual operation signals are sent to the main body ECU.

* Perform this inspection with the back door window glass fully closed.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK VEHICLE CONDITION

(a) Check whether the rear wiper and washer systems operate normally.

Result

C -- INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

B -- INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY
A -- Continue to next step.

2. INSPECT FUSE (ECU-IG No. 2)

(a) Remove the ECU-IG No. 2 fuse from the main body ECU.

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

Standard Resistance:

(c) Reinstall the ECU-IG No. 2 fuse.

NG -- REPLACE FUSE
OK -- Continue to next step.

3. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Remove the windshield wiper switch assembly.

(b) Inspect the rear wiper switch.

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

Standard Resistance:

(d) Inspect the rear washer switch.

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

Standard Resistance:

(f) Reinstall the the windshield wiper switch assembly.

NG -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BODY GROUND)

(a) Disconnect the H14 windshield wiper switch assembly connector.

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

Standard Resistance:

(c) Reconnect the windshield wiper switch assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU)

(a) Disconnect the H3 and H4 main body ECU connector.

(b) Inspect the rear wiper switch.

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

Standard Resistance:

(d) Inspect the rear washer switch.

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

Standard Resistance:

(f) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

(a) Disconnect the DA main body ECU connector.

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

Standard Voltage:

(c) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION SWITCH, BODY GROUND)

(a) Disconnect the DD main body ECU connector.

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

Standard Voltage:

(d) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU

8. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Remove the windshield wiper switch assembly.

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

Standard Resistance:

(c) Reinstall the windshield wiper switch assembly.

NG -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

9. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU, BODY GROUND)

(a) Disconnect the H3 main body ECU connector.

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

Standard Resistance:

(c) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

10. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Remove the windshield wiper switch assembly.

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

Standard Resistance:

(c) Reinstall the windshield wiper switch assembly.

NG -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

11. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU, BODY GROUND)

(a) Disconnect the H4 main body ECU connector.

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

Standard Resistance: