Control Unit Input Test
NOTE:
Before testing, troubleshoot the multiplex integrated control system using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Remove the roof console (see INTERIOR LIGHT SWITCH TEST/REPLACEMENT ).
- Disconnect the 22P connector (A) from the Hands Free Link control unit (B).
- Inspect the connector and socket 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 4.
- With the connector still disconnected, 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, the Hands Free Link control unit must be faulty; replace it.
Hands Free Link CONTROL UNIT INPUT TESTCavity Wire Test condition Test: Desired result Possible cause if result is not obtained 13 BLK Under all conditions Check for continuity to ground:
There should be continuity.- Poor ground (G503, G601)
- An open in the wire
11 GRY/BLU Under all conditions Check for voltage to ground:
There should be battery voltage.- Blown No. 6 (7.5 A) fuse in the underdash fuse/relay box
- An open in the wire
14 RED/WHT Under all conditions Check for continuity between No. 14 terminal and the underdash fuse/relay box connector X (39P) terminal No. 18:
There should be continuity.An open in the wire Under dash fuse relay box connector X (39P) disconnected Check for continuity to ground:
There should be no continuity.A short to ground in the wire 1 YEL/RED Ignition switch ACC(I) or ON(II) Check for voltage to ground:
There should be battery voltage.- Blown No. 32 (7.5 A) fuse in the underdash fuse/relay box
- An open in the wire