Wiper/Washer Switch (Combination Switch Control Unit) Input Test
- Before troubleshooting the wiper/washer system, troubleshoot the B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
- Remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
- Disconnect the 8P connector (A) from the wiper/washer switch (B).
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 6.
- Reconnect the connector, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 7.WIRE TEST CONDITION REFERENCE
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 3 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V.- Poor ground (G503,G601)
- An open in the wire
8 WHT/RED Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. 15 (40 A) fuse in the under-hood fuse/relay box
- Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
- A short to ground in the wire
- An open in the wire
7 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.- Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
- A short to ground in the wire
- An open in the wire
- Disconnect the connector from the wiper/washer switch, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the combination switch control unit must be faulty, replace the wiper/washer switch.WIRE TEST CONDITION REFERENCE
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 5 PNK Disconnect the under-hood fuse/relay box connector K(1 OP) Check for continuity between the No. 5 terminal and under-hood fuse/relay box connector K (10P) No. 5 terminal:
There should be continuity.An open in the wire Check for continuity between the No. 5 terminal and body ground:
There should be no continuity.A short to ground in the wire 4 LT GRN Disconnect the under-dash fuse/relay box connector X (39P) Check for continuity between the No. 4 terminal and under-dash fuse/relay box connector X (39P) No. 27 terminal:
There should be continuity.An open in the wire Check for continuity between the No. 4 terminal and body ground:
There should be no continuity.A short to ground in the wire 1 WHT Disconnect the under-hood fuse/relay box connector K(10P) Check for continuity between the No. 1 terminal and under-hood fuse/relay box connector K (10P) No. 6 terminal:
There should be continuity.An open in the wire Check for continuity between the No. 1 terminal and body ground:
There should be no continuity.A short to ground in the wire