Diagnostics For A/C System Malfunction

Diagnostics for A/C System Malfunction

A/C OR SELF DIAGNOSIS FUNCTION FAILS TO OPERATE

TROUBLE SYMPTOM:
- Set temperature is not indicated on the display, switch LEDs are faulty and switches do not operate.
- Self-diagnosis system does not operate.

WIRING DIAGRAM

Wiring Diagram:

Step 1-6:

BLOWER FAN DOES NOT ROTATE

TROUBLE SYMPTOM
- Blower motor does not rotate.
- Blower motor does not change speeds.

WIRING DIAGRAM

Wiring Diagram:

Step 1-7:

Step 8-10:

BLOWER MOTOR TURNS AROUND EARLY

TROUBLE SYMPTOM
- The blower turns even though the blower switch is not turned ON.
- The blower motor continues to turn at high speed. (Cannot be adjusted.)

WIRING DIAGRAM

Wiring Diagram:

Step 1-3:

COMPARTMENT TEMPERATURE DOES NOT CHANGE, OR A/C SYSTEM DOES NOT RESPOND PROMPTLY

TROUBLE SYMPTOM
- Compartment temperature does not change (Cold air does not come out).
- The A/C system does not respond (Response is extremely slow).

WIRING DIAGRAM

Wiring Diagram:

Step 1-6:

Step 7-11: