Front AC

Symptom

Suspect Area

See page

Whole functions of the A/C system does not operate

3. A/C control assembly

4. IG power source circuit

IN-31 DI-749

1. IG power source circuit

DI-749

Air Flow Control: No blower operation

2. Front heater relay circuit

3. Blower motor circuit

DI-756 DI-765

4. A/C control assembly

IN-31

1. Blower motor circuit

DI-765

Air Flow Control: No blower control

2. A/C control assembly

IN-31

3. Solar sensor circuit

DI-715

Air Flow Control: Insufficient air flow

Blower motor circuit

DI-765

1. Refrigerant volume

AC-3

2. Drive belt tension

AC-17

3. Refrigeration system inspection with manifold gauge set

AC-3

4. Compressor circuit

DI-776

Temperature Control: No cool air comes out

5. Pressure switch circuit

6. Front air mix damper position sensor circuit

DI-721 DI-727

7. Front air mix damper control servomotor circuit

DI-736

8. Front room temp. sensor circuit

DI-712

9. Ambient temp. sensor circuit

DI-703

10.A/C control assembly

IN-31

1. Front air mix damper position sensor circuit

DI-727

2. Front air mix damper control servomotor circuit

DI-736

Temperature Control: No warm air comes out

3. Front room temp. sensor circuit

4. Ambient temp. sensor circuit

DI-712 DI-703

5. Front evaporator temp. sensor circuit

DI-706

6. A/C control assembly

IN-31

1. Refrigerant volume

AC-3

2. Drive belt tension

AC-17

3. Refrigeration system inspection with manifold gauge set

AC-3

4. Cooling fan system

AC-109

5. Solar sensor circuit

DI-715

6. Front room temp. sensor circuit

DI-712

7. Ambient temp. sensor circuit

DI-703

Temperature Control: Output air is warmer or cooler that the set temperature or response is slow

8. Front Evaporator temp. sensor circuit

9. Front air mix damper position sensor circuit

10.Front air mix damper control servomotor circuit

DI-706 DI-727 DI-736

11. Front air inlet damper position sensor circuit

DI-730

12.Front air inlet damper control servomotor circuit

DI-739

13.Condenser

AC-72

14.Evaporator

AC-30

15.Heater radiator

AC-77

16.Expansion valve

AC-25

17.A/C control assembly

Symptom

Suspect Area

See page

Temperature Control: No temperature control (only Max. cool or Max. warm)

1. Front room temp. sensor circuit

2. Ambient temp. sensor circuit

3. Front air mix damper position sensor circuit

4. Front air mix damper control servomotor circuit

5. A/C control assembly

DI-712 DI-703 DI-727 DI-736 IN-31

No air inlet control

1. Front air inlet damper position sensor circuit

2. Front air inlet damper control servomotor circuit

3. A/C control assembly

DI-730 DI-739 IN-31

No air flow control

1. Air outlet damper control servomotor circuit

2. A/C control assembly

DI-744 IN-31

Engine idle up does not occur, or is continuous

1. Compressor circuit

2. ECM

DI-776 DI-19

A/C indicator blinking

1. Igniter circuit

2. Compressor lock sensor circuit

3. A/C control assembly

DI-754 DI-71S DI-19

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