Inspection and Adjustment

INSPECTION AND ADJUSTMENT

Description and Conditions

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

CONDITIONS:
- Engine running and at normal operation temperature.

Inspection Procedure

INSPECTION PROCEDURE:

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

If NG, go to HAC-128, "Diagnosis Procedure". Blower Motor Circuit
If OK, continue with next check.

STEP 2: Check Discharge Air






Intake door position is checked in the next step.
If NG, go to HAC-125, "Diagnosis Procedure". Intake Door
If OK, continue with next check.

STEP 3: Check Recirculation






If NG, go to HAC-125, "Diagnosis Procedure". Intake Door Motor Circuit
If OK, continue with next check.

STEP 4: Check Temperature Decrease
1. Turn the temperature dial counterclockwise to maximum cold.
2. Check for cold air at discharge air outlets.

If NG, go to HAC-123, "Diagnosis Procedure". Air Mix Door Motor Circuit
If OK, continue with next check.

STEP 5: Check Temperature Increase
1. Turn the temperature dial clockwise to maximum heat.
2. Check for hot air at discharge air outlets.

If NG, go to HAC-123, "Diagnosis Procedure". Air Mix Door Motor Circuit
If OK, continue with next check.

STEP 6: Check Air Conditioner Switch (if equipped)
1. Turn blower control dial to the desired position and push the A/C switch to turn ON the air conditioner.
2. Confirm that the A/C indicator illuminates and that the compressor clutch engages (audio or visual inspection).

If NG, go to HAC-136, "Diagnosis Procedure", Power Supply and Ground Circuit For Front Air Control then if necessary, HAC-132, "Diagnosis Procedure". Magnet Clutch Circuit If OK, listen to customer complaint (get detailed information about the conditions and environment when the symptom occurs). Verify the symptom and refer to HAC-160, "Symptom Matrix Chart". Symptom Chart