Recirculation Control Motor Circuit Troubleshooting (Without A/C)

Recirculation Control Motor Circuit Troubleshooting

1. Check the No. 20 (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. 20 (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 open in the wire between the No. 20 (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 - Go to step 11.


7. Disconnect the heater control panel 30P connector.

8. Check for continuity between heater control panel 30P connector terminals No. 15 and No. 16 and body ground individually.

Is there continuity?
YES - Repair short to body ground in the wire(s) between the heater control panel and the recirculation control motor.

NO - Go to step 9.






9. Turn the ignition switch to ON (II), and measure the voltage between the same terminals and body ground.

Is there any voltage?
YES - Repair short to power in the wire(s) between the heater control panel and the recirculation control motor. This short may also damage the heater control panel. Repair the short to power before replacing the heater control panel.

NO - Go to step 10.






10. Turn the ignition switch to LOCK (0), and check for continuity between the following terminals of the heater control panel 30P connector and the recirculation control motor 7P connector.





Is there continuity?
YES - Check for loose wires or poor connections at the heater control panel 30P connector, and at the recirculation control motor 7P connector. If the connections are good, substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.

NO - Repair open in the wire(s) between the heater control panel and the recirculation control motor.






11. Remove the recirculation control motor. Recirculation Control Motor Replacement

12. Check the recirculation control linkage and doors for smooth movement.

Do the recirculation control linkage and doors move smoothly?
YES - Replace the recirculation control motor.

NO - Repair the recirculation control linkage or doors.