| DTC 4: | An Open or Short in the Mode Control Motor Circuit |
| 1. | Disconnect the mode control motor 7P connector. |
| 2. | Disconnect the audio-HVAC module 22P connector. |
| 3. | Check for continuity between body ground and the audio-HVAC module 22P connector terminals No. 2, 3, 4, 5, 9, 11, and 12 individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the audio-HVAC module and the mode control motor.n NO - Go to 4. |
| 4. | Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the audio-HVAC module and the mode control motor. This short may also damage the printed circuit board. Repair the short to power before replacing the printed circuit board.n NO - Go to 5. |
| 5. | Turn the ignition switch OFF, and check for continuity between the following terminals of the audio-HVAC module 22P connector and the mode control motor 7P connector.
Is there continuity? YES - Check for loose wires or poor connections at the audio-HVAC module 22P connector and at the mode control motor 7P connector. If the connections are good, test the mode control motor. If the mode control motor is OK, substitute a known-good audio-HVAC module, and recheck.If the symptom/indication goes away, replace the original printed circuit board.n NO - Repair any open in the wire(s) between the audio-HVAC module and the mode control motor.n |