Control Unit Input Test/Replacement
- Remove the passenger's dashboard undercover (see PASSENGER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
- Remove the glove box (see PASSENGER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
- Disconnect the 28P connector (A) from the HandsFreeLink control unit (B).
- Remove the mounting bolt (C) and loosen the bolt (D), then remove the bolts (E) from the bracket.
- 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 6.
- Reconnect the connector and make these input tests at the connector under the test conditions listed.
- 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 7.
WIRE COLOR TERMINAL REFERENCE CHARTCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 14 BLK Under all conditions Measure the voltage to body ground: There should be less than 0.2 V. - Poor ground(G503)
- An open or high resistance in the wire
27 PUR Ignition switch in ACCESSORY (I) or ON (II) Measure the voltage to body ground: There should be battery voltage. - Blown No. B14 (7.5 A) fuse in the under-dash fuse/relay box
- An open or high resistance in the wire
28 PNK Under all conditions Measure the voltage to body ground: There should be battery voltage. - Blown No. B1 (15 A) fuse in the under-dash fuse/relay box
- An open or high resistance 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.
WIRE COLOR TERMINAL REFERENCE CHARTCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 25 GRN Under all conditions Check for continuity between No. 25 terminal and the under-dash fuse/relay box connector Y (16P) terminal No. 6: There should be continuity. An open in the wire Disconnect these items: - Under-dash fuse/relay box connector Y(16P)
- Gauge control module 32P connector
- Immobilizer-keyless control unit 7P connector
- Climate control unit 36P connector
Check for continuity to ground: There should be no continuity. Short to body ground in the wire