Rear Ac

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Symptom

Suspect Area

Whole functions of the rear A/C system does not operate

1. Heater control assembly

2. Integration control and pane*

3. ACC power source circuit

Air Flow Control: No blower operation

1. ACC power source circuit

2. Roar heater main relay

3. Rear blower motor

4. Rear blower motor controller

5. Heater control assembly

6. Integration control and panel

Air Flow Control: Wo blower control

1. Rear heater main relay

2. Rear blower motor

3. Rear blower motor controller

4. Hoator control assembly

5. Integration control and panel

6. Solar sensor circuit

Air Flow Control: Insufficient air flow

1 Rear blower motor 2. Rear blower resister

Temperature Control: No cool air comes out

1 Refrigerant volume

2. Drive belt tension

3. Refrigeration system inspection with manifold gauge set A. Compressor circuit

5, Pressure switch circuit

6, Water valve damper position sensor circuit

7, water valve dam per control se rvomotor circuit Rear room temp sensor circuit

9. Ambient temp, sensor circuit

10.ECM

11. Heater control assembly

12. Integration control and panel

Temperature Control: No warm air comes out

1. Water valve damper position sensor circuit

2. Water valve dam per control se rvomotor circuit

3. Rear room temp, sensor circuit

4. Ambient temp, sensor circuit

5. Rear evaporator temp, sensor circuit

6. Heater control assembly

7. Integration control and panel

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. Rear room temp, sensor circuit

7. Ambient temp, sensor circuit

8. Rear evaporator temp, sensor circuit

9. Water valve damper position sensor circuit

10.Water valve damper control servomotor circuit

11. Condenser

12. Evaporator

13.Heater radiator

14.Expansion valve

15.Heater control assembly

16. Integration control and panel

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

1. Rear room temp. sensor circuit

2. Ambient temp, sensor circuit

3. Water valve damper position sensor circuit

4 Water valve dam per control se rvomotor circuit

5. Heater control assembly

6. Integration control and panel

G02922171

G02922171

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Responses

  • CRESCENZO
    Which relay controls the rear ac in sequoia?
    6 years ago
  • GOYTIOM
    How to fix a blower motor for rear on a 2004 toyota sequoia?
    2 years ago

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