Control Unit Input Test
- Remove the HandsFreeLink control unit (see HANDSFREELINK CONTROL UNIT REMOVAL/INSTALLATION ).
- Inspect the connector (A) and socket (B) terminals for a good pin fit 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 3.
- 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 4.
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 1 BLK Under all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground(G506)
- An open in the wire
15 WHT Under all ignition switch positions Measure the voltage to ground: There should be battery voltage. - Blown No. 5 (10 A) fuse in the driver's under-dash fuse/relay box
- An open or high resistance in the wire
16 PUR Ignition switch ACCESSORY (I) or ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. 32 (10 A) fuse in the driver's 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 (see HANDSFREELINK CONTROL UNIT REMOVAL/INSTALLATION ).
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 18 LT GRN Under all ignition switch positions Check for continuity between terminal No. 18 and under-dash fuse/relay box connector N (45P) terminal No. 28: There should be continuity. - An open in the wire
- Check for CAN DTCs
Under-dash fuse/relay box connector N (45P) disconnected Check for continuity to ground: There should be no continuity. - Short to ground
- Check for CAN DTCs