Is there any voltage?
YES -
Repair a short to power in the wire between the climate control unit and the A/C pressure sensor. This short may also damage the climate control
unit. Repair a short to power before replacing the climate control unit.?
NO -
Go to step 12.
12. Turn the ignition switch to LOCK (0).
13. Reconnect climate control unit connector A (40P).
14. Turn the ignition switch to ON (II).
15. Measure the voltage between climate control unit connector A (40P) terminals No. 6 and No. 8, and between climate control unit connector A
(40P) terminals No. 8 and No. 26.
Is there about 5 V?
YES -
Replace the A/C pressure sensor.?
NO -
Check for loose wires or poor connections at climate control unit connector A (40P) and at the A/C pressure sensor 3P 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 See: Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
16. Turn the ignition switch to LOCK (0), and disconnect climate control unit connector A (40P).
17. Disconnect these items:
- Driver's air mix control motor
- Passenger's air mix control motor
- Rear air mix control motor
- Humidity/in-car temperature sensor
- A/C pressure sensor
18. Check for continuity between climate control unit connector A (40P) terminal No. 6 and body ground.
