Manual Controls Circuit Troubleshooting

Manual Controls Circuit Troubleshooting

1. Disconnect navigation or multi-information display unit connector A (5P).
2. Disconnect climate control unit connector A (16P).




3. Check for continuity between the given terminals of climate control unit connector A (16P) and navigation or multi-information display unit connector A (5P).

16P 5P
No.8 No.4
No.15 No.3
No.16 No.2

Is there continuity?

YES - Go to step 4.

NO - Repair any open in the wire(s) between the climate control unit and the navigation or multi-information display unit.




4. Check for continuity between the body ground and climate control unit connector A (16P) terminals No.8,15 and 16 individually.

Is there continuity?

YES - Repair any short to body ground in the wire(s) between the climate control unit and the navigation or multi-information display unit.

NO - Check for loose wires or poor connections at climate control unit connector A (16P) and at navigation or multi-information display unit connector A (5P). If the connections are good, substitute a known-good climate control unit, and recheck. If the problem still exists, replace the navigation or multi-information display unit.