Manual Air Conditioning

The purpose of the operational check is to confirm that the system operates as it should. The systems which are checked are the blower, mode (discharge air), intake air, temperature decrease, temperature increase.

CONDITIONS:
Engine running at normal operating temperature.

PROCEDURE:




1. Check Blower
1. Turn fan control dial to 1-speed. Blower should operate on 1-speed.
2. Then turn fan control dial to 2-speed.
3. Continue checking blower speed until all four speeds are checked.
4. Leave blower on 4-speed.
If NG, go to "Blower Motor Circuit".
If OK, continue with next check.




2. Check Discharge Air
1. Turn air control dial to each position.
2. Confirm air discharge at all air outlets.
If NG, go to "Mode Door Motor Circuit".
If OK, continue with next check.




3. Check Recirculation
1. Press recirculation switch.
Recirculation indicator should light.

2. Listen for intake door position change (you should hear blower sound change slightly).

NOTE: Confirm that the RECIRCULATION (REC) switch is canceled in the FOOT, D/F and DEF modes.
If NG, go to "Intake Door Motor Circuit".
If OK, continue with next check.




4. Check Temperature Decrease
1. Turn fan control dial to 1-speed.
2. Turn temperature control dial to full cold.
3. Check for cold air at discharge air outlets.
If NG, go to "Insufficient Cooling".
If OK, continue with next check.




5. Check Temperature Increase
1. Turn temperature control dial to full hot.
2. Check for hot air at discharge air outlets.
If NG, go to "Insufficient Heating".
If OK, continue with next check.




6. Check Air Conditioner Switch
Turn fan control dial to the desired (1- to 4-speed) position and push the air conditioner switch (if equipped) to turn ON the air conditioner. The indicator light should come on when air conditioner is ON.
If NG, go to "A/C System".

If all operational checks are OK (symptom can not be duplicated), go to "Incident Simulation Tests" and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to "SYMPTOM TABLE" (Symptom Chart) and perform applicable trouble diagnosis procedures.