Control Unit Input Test/Replacement
- Remove the center console (see CENTER CONSOLE REMOVAL/INSTALLATION ).
- Remove the console lower box (see CENTER CONSOLE ARMREST REPLACEMENT ).
- Disconnect the 28P connector (A) from the HandsFreeLink control unit (B).
- Inspect the connector and socket terminals for a good pinfit 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 5.
- 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 6.TEST CONDITION CHART
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 1 BLK Under all conditions Check for voltage to ground:
There should be less than 0.5 V.- Poor ground (G501)
- An open in the wire
15 WHT Under all conditions Check for voltage to ground:
There should be battery voltage.- Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
- An open in the wire
16 PUR Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage.- Blown No. 35 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
- Disconnect the 28P connector again, and make this input test at the connector.
- If the test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, the HandsFreeLink control unit must be faulty, replace it.TEST CONDITION CHART
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 18 PNK Under all conditions Check for continuity between No. 18 terminal and the driver's under-dash fuse/relay box connector Q (16P) terminal No. 6:
There should be continuity.An open in the wire Driver's under-dash fuse/relay box connector Q (16P) disconnected Check for continuity to ground:
There should be no continuity.Short to ground