Front Wiper Motor Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Front Wiper Motor Circuit
- Front Wiper Motor Circuit

DESCRIPTION

The front controller controls the wiper motor. Even if the ECU is malfunctioning, the wiper motor circuit is designed so that the wipers can still function in HI mode.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Body No. 5 / Active Test.

(e) Check the wiper motor operation by performing the Active Test.

Body No. 5 (Front Controller):





OK:

Wiper motor operates in HI or LO mode depending on command.

NG -- INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

(a) Remove the windshield wiper motor assembly Removal.





(b) LO operation check.

(1) Connect the positive battery (+) lead to terminal 1 (+1) of the connector, and the negative battery (-) lead to terminal 5 (E).

OK:

Motor is operated at low speed.

(c) HI operation check.

(1) Connect the positive battery (+) lead to terminal 4 (+2) of the connector, and the negative battery (-) lead to terminal 5 (E).

OK:

Motor is operated at high speed.

(d) Automatic stop operation check.

(1) Connect the positive battery (+) lead to terminal 1 (+1) of the connector, and the negative battery (-) lead to terminal 5 (E). With the motor operating at low speed, disconnect terminal 1 (+1) to stop wiper motor operation where in any position other than the automatic stop position.

(2) Using SST, connect terminals 3 (+S) and 1 (+1), and the positive battery (+) lead to terminal 2 (B) to restart motor operation at low speed.

(3) Check that the motor stops at the automatic stop position.





OK:

Motor stops as shown in the illustration.

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

3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - FRONT CONTROLLER)

(a) Disconnect the A16 wiper motor connector.





(b) Disconnect the 1D and 1E connectors from the front controller.





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

Resistance:





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

4. CHECK HARNESS AND CONNECTOR (BATTERY - FRONT CONTROLLER)

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





Voltage:





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

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

(a) Disconnect the A16 wiper motor connector.





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

Resistance:





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

6. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BODY GROUND)

(a) Disconnect the 1H connector from the front controller.





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

Resistance:





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

7. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH CIRCUIT)

(a) Disconnect the 1G connector from the front controller.





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

Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE