1. Remove the audio-HVAC display module.

1. Disconnect the audio-HVAC display panel connector B (16P).

1. Inspect the connector and socket terminals 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 .

1. 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 climate control unit must be faulty, replace the audio-HVAC display panel.

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   4 | WHT *1 BLK/YEL *2 | Ignition switch ON (II) | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 30 (7.5 A) fuse in the under-dash fuse/relay box
   - An open in the wire
   6 | BLK | Under all conditions | Check for continuity to ground: There should be continuity. |
   - Poor ground (G503)
   - An open in the wire
   14 | LT BLU | Under all conditions | Check for continuity between terminal No. 14 and the under-dash fuse/relay box connector N (45P) terminal No. 22: There should be continuity. | An open in the wire
   Under-dash fuse/relay box connector N (45P) disconnected | Check for continuity to ground: There should be no continuity. | Short to ground

   *1: | LHD type
   *2: | RHD type