Operational Check

INSPECTION AND ADJUSTMENT


Operational Check

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

Conditions : Engine running and at normal operating temperature

CHECKING BLOWER
1. Turn blower control dial clockwise. Blower should operate on low speed.
2. Turn the blower control dial again, and continue checking each blower speed until all speeds are checked.
3. Leave blower on speed 4.
If NG, go to trouble diagnosis procedure for Front Blower Motor Diagnosis Procedure.
If OK, continue with next check.

CHECKING DISCHARGE AIR
1. Turn the mode switch to each position.
2. Confirm that discharge air comes out according to the air distribution table. Discharge Air Flow.
Mode door position is checked in the next step.
If NG, go to trouble diagnosis procedure for Mode Door Motor (Front) Diagnosis Procedure.
If OK, continue with next check.






NOTE:
Confirm that the A/C compressor clutch is engaged (sound or visual inspection) and intake door position is at fresh when the DEF ( ) or D/F ( ) is selected.

CHECKING RECIRCULATION






1. Press recirculation ( ) switch one time. Recirculation indicator should illuminate.
2. Press recirculation ( ) switch one more time. Recirculation indicator should go off.
3. Listen for intake door position change (blower sound should change slightly).
If NG, go to trouble diagnosis procedure for Intake Door Motor Diagnosis Procedure.
If OK, continue with next check.

NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at fresh when the DEF or D/F is selected.

CHECKING TEMPERATURE DECREASE
1. Rotate temperature control dial counterclockwise.
2. Check for cold air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation if OK, go to trouble diagnosis procedure for Component Function Check. If air mix door motor appears to be malfunctioning, go to Component Function Check.
If OK, continue with next check.

CHECKING TEMPERATURE INCREASE
1. Rotate temperature control dial clockwise.
2. Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for Insufficient Heating. If air mix door motor (front) appears to be malfunctioning, go to Component Function Check.
If OK, continue with next check.

CHECK A/C SWITCH
1. Press A/C switch with the blower switch ON.
2. A/C switch indicator will turn ON.
- Confirm that the compressor clutch engages (sound or visual inspection).
If NG, go to trouble diagnosis procedure for Magnet Clutch Diagnosis Procedure.
If OK, continue with next check.