Climate Control Unit Lost Communication with Audio Unit
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Do the self-diagnostic function with the HDS.
4. Check for DTCs.
Is DTC B2991 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for loose wires or poor connections in the rear climate control panel and climate control unit circuit.?
5. Turn the ignition switch to LOCK (0).
6. Disconnect climate control unit connector B (14P).
7. Disconnect audio unit (without navigation) connector C (24P) or audio-navigation unit (with navigation) connector F (20P).
8. Check for continuity between climate control unit connector B (14P) terminal No. 8 and audio unit (without navigation) connector C (24P)
terminal No. 24 or audio-navigation unit (with navigation) connector F (20P) terminal No. 10.
