DI3F3-05
-
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI-697
851
Author:
Date:
2001 SIENNA (RM787U)
PROBLEM SYMPTOMS TABLE
Front A/C
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
Air Flow Control: No blower operation
1. IG power source circuit
2. Front heater relay circuit
3. Blower motor circuit
4. A/C control assembly
Air Flow Control: No blower control
1. Blower motor circuit
2. A/C control assembly
3. Solar sensor circuit
Air Flow Control: Insufficient air flow
Blower motor circuit
Temperature Control: No cool air comes out
1. Refrigerant volume
2. Drive belt tension
3. Refrigeration system inspection with manifold gauge set
4. Compressor circuit
5. Pressure switch circuit
6. Front air mix damper position sensor circuit
7. Front air mix damper control servomotor circuit
8. Front room temp. sensor circuit
9. Ambient temp. sensor circuit
10.A/C control assembly
Temperature Control: No warm air comes out
1. Front air mix damper position sensor circuit
2. Front air mix damper control servomotor circuit
3. Front room temp. sensor circuit
4. Ambient temp. sensor circuit
5. Front evaporator temp. sensor circuit
6. A/C control assembly
Temperature Control: Output air is warmer or cooler that the set
temperature or response is slow
1. Refrigerant volume
2. Drive belt tension
3. Refrigeration system inspection with manifold gauge set
4. Cooling fan system
5. Solar sensor circuit
6. Front room temp. sensor circuit
7. Ambient temp. sensor circuit
8. Front Evaporator temp. sensor circuit
9. Front air mix damper position sensor circuit
10.Front air mix damper control servomotor circuit
11.Front air inlet damper position sensor circuit
12.Front air inlet damper control servomotor circuit
13.Condenser
14.Evaporator
15.Heater radiator
16.Expansion valve
17.A/C control assembly
Содержание RM787U
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