Combination Switch Control Unit Input Test
- Turn the ignition switch to LOCK (0), remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ), and the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ), then remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
- Disconnect the 8P connector from the wiper/washer switch (combination switch control unit).
- 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 4.
- Reconnect the connector to the wiper/washer switch, and do the following input tests.
- 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 5.
DTC TEST REFERENCE CHARTCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 3 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground (G501)
- An open or high resistance in the ground wire
8 WHT 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 (10 A) fuse in the driver's under-dash fuse/relay box
- An open or high resistance in the wire
7 PNK Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. 21 (10 A) fuse in the driver's under-dash fuse/relay box
- An open or high resistance in the wire
- Disconnect the 8P connector from the wiper/washer switch, and do the following input tests.
- 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.
DTC TEST REFERENCE CHARTCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 4 LT GRN Under all conditions Check for continuity between terminal No. 4 and driver's under-dash fuse/relay box connector N (45P) terminal No. 28: There should be continuity. An open or high resistance in the wire Under all conditions (Driver's under-dash fuse/relay box connector N (45P) disconnected) Check for continuity to ground: There should be no continuity. A short to ground in the wire