Recirculation Control Motor Circuit Troubleshooting

Recirculation Control Motor Circuit Troubleshooting

1. Check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 2.

NO -

Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 10 (7.5 A) fuse circuit.

2. Disconnect the recirculation control motor 7P connector.

3. Turn the ignition switch to ON (II).

4. Measure the voltage between recirculation control motor 7P connector terminal No. 1 and body ground.





Is there battery voltage?

YES -

Go to step 5.

NO -

Repair an open in the wire between the No. 10 (7.5 A) fuse in the under-dash fuse/relay box and the recirculation control motor.

5. Turn the ignition switch to LOCK (0).

6. Test the recirculation control motor Recirculation Control Motor Test.

Is the recirculation control motor OK?

YES -

Go to step 7.

NO -

Replace the recirculation control motor Recirculation Control Motor Replacement, or repair the recirculation control linkage or door.

7. Disconnect the climate control unit 36P connector.

8. Check for continuity between body ground and climate control unit 36P connector terminals No. 8 and No. 9 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the climate control unit and the recirculation control motor.

NO -

Go to step 9.

9. Turn the ignition switch to ON (II).

10. Measure the voltage between body ground and climate control unit 36P connector terminals No. 8 and No. 9 individually.





Is there any voltage?

YES -

Repair a short to power in the wires between the climate control unit and the recirculation control motor. This short may also damage the climate control unit. Repair a short to power before replacing the climate control unit.

NO -

Go to step 11.

11. Turn the ignition switch to LOCK (0).

12. Check for continuity between the following terminals of the climate control unit 36P connector and the recirculation control motor 7P connector.









Is there continuity?

YES -

Check for loose wires or poor connections at the climate control unit 36P connector and at the recirculation control motor 7P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit Climate Control Unit Removal/Installation.

NO -

Repair an open in the wire(s) between the climate control unit and the recirculation control motor.