Is there any voltage?
YES -
Repair a short to power in the wire. This short may have also damaged the climate control unit. Repair a short to power before replacing the climate
control unit.?
NO -
Go to step 17.
17. Turn the ignition switch to LOCK (0).
18. Reconnect the climate control unit connector A (40P).
19. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector A (40P) terminal No. 6 and body ground.
Is there about 5 V?
YES -
Go to step 20.
NO -
Check for a loose wire or poor connection at climate control unit connector A (40P). If the connection is 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.?
20. While measuring the voltage as described in step 19, reconnect these items individually and note the voltage reading each time:
- 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
Does the voltage remain at about 5 V?
YES -
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.?
NO -
Replace the component that caused the voltage drop.?
