Control Unit Input Test/Replacement
- Remove the passenger's console cover (see CENTER CONSOLE REMOVAL/INSTALLATION ).
- Disconnect the 28P connector (A), then remove the bolts (B) from the HandsFreeLink control unit (C).
- 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 4.
- 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 5.
Cavity Wire Color Test condition Test: Desired result Possible cause if result is not obtained 1 BLK Under all conditions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground(G503)
- An open in the wire
15 GRN Under all conditions Measure the 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 ACC (I) or ON (II) Measure the 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 do 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.
Cavity Wire Color 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 gauge control module 36P connector No. 30 terminal: There should be continuity. An open in the wire Gauge control module 36P connector disconnected Check for continuity to ground: There should be no continuity. Short to ground