Combination Switch Control Unit Input Test
NOTE:
Check the No. 22 (120 A), No. 23 (50 A), No. 15 (40 A) fuse in the under-hood fuse/relay box before troubleshooting.
- Before troubleshooting the multiplex integrated control system, troubleshoot the B-CAN System Diagnosis Test mode A (see Troubleshooting - B-CAN System Diagnosis Test Mode A ).
- Turn the ignition switch OFF.
- Remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
- Disconnect the 12P connector from the combination switch
- 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 all the connector to the control unit, 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 combination switch.TEST CONDITION (5 OF 6)
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 12 BLK Under all conditions Check for voltage to ground:
There should be less than 1 V.- Poor ground (G401)
- An open in the wire
7 WHT/RED Under all conditions Check for voltage to ground:
There should be battery voltage.- Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
1 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
3 LT GRN Under all conditions Check for continuity between No. 3 terminal and the under-dash fuse/relay box connector X (39P) No. 27 terminal:
There should be continuity.An open in the wire