Download 8 - Tradebit

1B-4 AIR CONDITIONING (OPTIONAL)
DIAGNOSIS
GENERAL
Trouble
Cool air does not come out
(A/C system improper operative)
Possible Cause
A/C system inoperative
No refrigerant
Fuse blown
A/C switch faulty
Blower motor switch faulty
A/C thermistor faulty
Dual pressure switch faulty
Wiring or grounding faulty
A/C controller and its circuit faulty
A/C ON permission signal in ECM
faulty
Compressor inoperative (dose not rotate)
Fuse blown
Compressor relay faulty
Magnet clutch faulty
Drive belt loose or broken
Compressor faulty
A/C ON permission signal in ECM
faulty
A/C controller faulty
Sub radiator fan motor (condenser
fan motor) inoperative
Fuse blown
Sub radiator fan motor relay faulty
Wiring or grounding faulty
Sub radiator fan motor faulty
Blower motor inoperative
Fuse blown
Blower fan motor relay faulty
Blower fan motor resistor faulty
Blower fan motor switch faulty
Wiring or grounding faulty
Blower fan motor faulty
Measure
Recover, evacuation and charging.
Check “BACK”, “DEF”, “RD FAN SUB”
and “A/C” fuses and check for short
circuit.
Check A/C switch.
Check blower motor switch.
Check A/C thermistor.
Check dual pressure switch.
Repair as necessary.
Check A/C controller and its circuit.
Check A/C ON permission signal.
Check “A/C” and “DEF” fuses, and
check for short circuit.
Check compressor relay.
Check magnet clutch.
Tighten or replace drive belt.
Check compressor.
Check A/C ON permission signal.
Check A/C controller.
Check “SUB RD FAN” and “DEF”
fuses, and check for short circuit.
Check sub radiator fan motor relay.
Repair as necessary.
Check sub radiator fan motor.
Check “DEF” fuse and cassette fuse,
and check for short circuit.
Check blower fan motor relay.
Check blower fan motor resistor.
Check blower fan motor switch.
Repair as necessary.
Check blower fan motor.
SY419
supple