Manual Air Conditioning

Operational Check
The purpose of the operational check is to confirm that the system operates properly.

CONDITIONS:
- Engine running and at normal operating temperature.

PROCEDURE:

1. Check Blower




1. Turn fan dial clockwise, blower should operate on low speed.
2. Continue turning fan dial clockwise, and continue checking fan speeds until all speeds are checked.
3. Leave blower on HI speed.

If NG, go to MTC-54, "Blower Motor Circuit". Blower Motor Circuit
If OK, continue with next check.

2. Check Discharge Air




1. Turn mode dial clockwise five positions.




2. Confirm that discharge air comes out according to the air distribution table.
Refer to "Discharge Air Flow".

Intake door position is checked in the next step.
If NG, go to MTC-48, "Mode Door Motor Circuit". Mode Door Motor Circuit
If OK, continue with next check.

3. Check Recirculation
1. Press REC switch.
Recirculation indicator should illuminate.
2. Press REC switch a second time.
Recirculation indicator should turn off.
3. Listen for intake door position change (you should hear blower sound change slightly).

If NG, go to MTC-52, "Intake Door Motor Circuit". Intake Door Motor Circuit
If OK, continue with next check.

4. Check Temperature Decrease




1. Turn the temperature dial fully counterclockwise.
2. Check for cold air at discharge air outlets.

If NG, go to MTC-63, "Insufficient Cooling". Insufficient Cooling
If OK, continue with next check.

5. Check Temperature Increase




1. Turn the temperature dial fully clockwise.
2. Check for hot air at discharge air outlets.

If NG, go to MTC-70, "Insufficient Heating". Insufficient Heating
If OK, continue with next check.

6. Check Air Conditioner Switch




1. Turn fan dial to the desired position and push the air conditioner switch (if equipped) to turn ON the air conditioner.
2. Confirm that the A/C indicator lamp illuminates and that the compressor clutch engages (audio or visual inspection).

If NG, go to MTC-43, "Power Supply and Ground Circuit for Front Air Control" Power Supply and Ground Circuit For Front Air Control, then if necessary, MTC-59, "Magnet Clutch Circuit" Magnet Clutch Circuit.
If all operational checks are OK (symptom can not be duplicated), go to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" How to Perform Efficient Diagnosis For an Electrical Incident and perform tests to simulate driving condition environment. If symptom appears, refer to "SYMPTOM TABLE" and perform applicable trouble diagnosis procedures.