Wiper/Washer Switch (Combination Switch Control Unit) Input Test - KE/KG/KB

1. Except KQ model Before troubleshooting the wiper/washer system, perform the multiplex integrated control system test mode A troubleshooting. Remove the dashboard lower cover. Remove the steering column covers. 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 tarminals look OK, go to Step 6 . With the connector still disconnected, 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, replace the wiper/washer switch (combination switch control unit).
   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   3 | BLK | Under all conditions | Check for continuity to ground: There should be continuity. | Poor ground (G501, G601) An open in the wire
   8 | WHT | Under all conditions | Check for voltage to ground: There should be battery voltage. | Blown No. 15 (40 A) fuse in the under-dash fuse/relay box Blown No. 7 (10 A) fuse in the under-dash fuse/relay box An open in the wire
   7 | YEL | Ignition switch ON (II) | Check for voltage to ground: There should be battery voltage. | Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box An open in the wire
   5 | GRN | Under all conditions | Check for continuity between the No. 5 terminal and under-hood fuse/relay box 10P connector No. 5 terminal: There should be continuity. | An open in the wire
   4 | LT BLU | Under all conditions | Check for continuity between the No. 4 terminal and under-dash fuse/relay box X connector No. 27 terminal: There should be continuity. | An open in the wire
   1 | WHT | Under all conditions | Check for continuity between the No. 1 terminal and under-hood fuse/relay box 10P connector No.6 terminal: There should be continuity. | An open in the wire