Climate Control Panel Circuit Troubleshooting

1. Check the No. 3 (7.5 A) fuse in the driver's under-dash fuse/relay box.

Is the fuses OK?

YES - Go to step 2.

NO - Replace the fuse and recheck.

2. Disconnect climate control panel 16P connector.
3. Turn the ignition switch ON (II).




4. Measure the voltage between the No. 7 terminal of climate control panel 16P connector and body ground.

Is there battery voltage?

YES - Go to step 5.

NO - Repair open in the wire between the No. 3 fuse in the driver's under-dash fuse/relay box and the climate control panel.

5. Turn the ignition switch OFF.
6. Disconnect climate control unit connectors A (16P) and B (26P).




7. Check for continuity between the following terminals of the climate control panel 16P connector and climate control unit connectors A (16P) and B (26P).
PANEL 16P UNIT 16P
No. 5 No. 12
No. 6 No. 14
No. 14 No. 13

PANEL16P UNIT26P
No. 12 No. 16

Is there continuity?

YES - Go to step 8.

NO - Repair any open in the wire(s) between the climate control panel and climate control unit.




8. Check the continue between the No. 5, 6, and 14 terminals of the climate control panel 16P connector and body ground individually.

Is there continuity?

YES - Repair any short to body ground in the wire(s) between the climate control panel and the climate control unit.

NO - Check for loose wires or poor connections at climate control unit connector A(16P ) and B (26P) and at the climate control panel 16P connector. If the connections are good, substitute a known-good climate control panel, and recheck. If the symptom/ indication is still present, substitute a known-good climate control unit, and recheck.