## Climate Control

#### Recirculation Control Motor Circuit Troubleshooting (cont'd)

21-145
ECT Sensor Circuit Troubleshooting

10. Turn the ignition switch OFF.

11. Check for continuity between the following terminals of climate control unit connector A (14P) and the recirculation control motor 5P connector.

    14P: | 5P:
    No. 5 | No. 1
    No. 6 | No. 2

CLIMATE CONTROL UNIT CONNECTOR A (14P)

Wire side of female terminals

RECIRCULATION CONTROL MOTOR 5P CONNECTOR

Wire side of female terminals

Is there continuity?

YES - Check for loose wires or poor connections at climate control unit connector A (14P) and at 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.

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

12. Remove the recirculation control motor (see page 21-49).
13. 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.

1. Check the malfunction indicator lamp (MIL).

Does the malfunction indicator lamp come on?

YES - Refer to the fuel and emissions section (see page 11-3).

NO - Go to step 2.

2. Turn the ignition switch OFF.
3. Disconnect the ECT sensor 2P connector.
4. Disconnect climate control unit connector B (22P).
5. Turn the ignition switch ON (II).
6. Measure the voltage between the No. 22 terminal of climate control unit connector B (22P) and body ground.

CLIMATE CONTROL UNIT CONNECTOR B (22P)

Wire side of female terminals

Is there about 5 V?

YES - Check for loose wires or poor connections at climate control unit connector B (22P) and at the ECT sensor 2P 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.

NO - Repair open in the wire between the climate control unit and the ECT sensor.