Control Unit Input Test
- Remove the HandsFreeLink control unit (A) (see HANDSFREELINK CONTROL UNIT REMOVAL/INSTALLATION ).
- Inspect the connector (B) and the socket (C) 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 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 Color Test Condition Test: Desired Result Possible Cause if Desired Result is not Obtained 1 BLK Ignition switch in ACC (I) or ON (II) Measure the voltage to body ground:
There should be less than 0.2 V.- Poor ground (G403)
- An open in the wire
17 WHT Under all conditions Measure the voltage to body ground:
There should be battery voltage.- Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
- An open in the wire
18 PUR Ignition switch in ACC (I) or ON (II) Measure the voltage to body ground:
There should be battery voltage.- Blown No. 35 (10 A) fuse in the under-dash fuse/relay box
- An open in the wire
- Disconnect the 32P connector again, and make this input test at the connector.
If the input test proves OK, the HandsFreeLink control unit is faulty, replace it.
Cavity Wire Color Test Condition Test: Desired Result Possible Cause if Desired Result is not Obtained 4 BLK Audio-navigation unit connector C (14P)(1) or audio unit connector C (14P)(2) disconnected Check for continuity between terminal No. 4 and audio-navigation unit connector C (14P)(1) or audio unit connector C (14P)(2) terminal No. 9:
There should be continuity.An open in the wire Disconnect these items:
Check for continuity between terminal No. 4 and body ground:
There should be no continuity.Short to body ground 5 WHT Audio-navigation unit connector C (14P)(1) or audio unit connector C (14P)(2) disconnected Check for continuity between terminal No. 5 and audio-navigation unit connector C (14P)(1) or audio unit connector C (14P)(2) terminal No. 10:
There should be continuity.An open in the wire Disconnect these items:
Check for continuity between terminal No. 5 and body ground:
There should be no continuity.Short to body ground (1) With navigation (2) Without navigation (3) With XM receiver