Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 26 209nv pstd4000

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55-14
HEATER & AIR CONDITIONER - AIR CONDITIONING SYSTEM
550XQ-03

PROBLEM SYMPTOMS TABLE
Use the table below to find the cause of the problem. The numbers indicate the priority of the likely cause
of the problem. Check each part in order. If necessary, replace these parts.
Manual A/C
Front A/C:
Symptom Suspected Area See page
5. HTR fuse -
6. A/C amplifier assy 55-2
Whole functions of the A/C system do not operate.
7. Integration control & panel assy 55-2
8. Wire harness or connector -

1. Blower resistor 55-7
2. Heater relay 55-7
3. Blower w/fan motor sub-assy 55-7
Air Flow Control : No blower operation
4. A/C amplifier assy 55-2
5. Integration control & panel assy 55-2
6. Wire harness or connector -

1. Blower w/fan motor sub-assy 55-7
2. Blower resistor 55-7
Air Flow Control : No blower control 3. A/C amplifier assy 55-2
4. Integration control & panel assy 55-2
5. Wire harness or connector -
1. Blower w/fan motor sub-assy 55-7
2. Blower resistor 55-7
Air Flow Control : Insufficient air comes out 3. A/C amplifier assy 55-2
4. Integration control & panel assy 55-2
5. Wire harness or connector -
1. Volume of refrigerant 55-16
2. Drive belt tension 55-29
3. Refrigerant pressure 55-16
4. Cooler compressor assy 55-7
Temperature Control : No cool air comes out 5. Pressure switch No.1 55-2
6. Condenser fan -
7. A/C amplifier assy 55-2
8. Integration control & panel assy 55-2
9. Wire harness or connector -
1. Engine coolant volume -
2. Cooler thermistor No.1 55-7
Temperature Control : No warm air comes out 3. A/C amplifier assy 55-2
4. Integration control & panel assy 55-2
5. Wire harness or connector -
1. Integration control & panel assy 55-2
Temperature Control : Air comes out warmer or cooler than the set
2. Airmix damper servo sub-assy 55-7
temperature, or response is slow.
3. Airmix level -
1. Integration control & panel assy 55-2
Temperature Control : No temperature control 2. Airmix damper servo sub-assy 55-7
3. Airmix level -
1. Cooling unit damper servo sub-assy 55-7
2. A/C amplifier assy 55-2
No air inlet control
3. Integration control & panel assy 55-2
4. Wire harness or connector -

1. Integration control & panel assy 55-2
No air outlet control 2. Air outlet damper servo sub-assy 55-7
3. Air outlet lever -

2005 SIENNA REPAIR MANUAL (RM1163U)

Author : Date : 2940
55-15
HEATER & AIR CONDITIONER - AIR CONDITIONING SYSTEM

1. Idle up switch 55-7
2. Cooler compressor assy 55-7
Engine idle up does not occur, or is continuous 3. A/C amplifier assy 55-2
4. Integration control & panel assy 55-2
5. Wire harness or connector -
1. Illumination light system -
Brightness does not change when rheostat volume or light control 2. A/C amplifier assy 55-2
switch is operated. 3. Integration control & panel assy 55-2
4. Wire harness or connector -

Manual A/C
Rear cooler:
Symptom Suspected Area See page
1. Cooler unit blower resistor 55-7
2. Heater relay 55-7
Air Flow Control : No blower operation 3. Cooling unit motor sub-assy w/fan 55-7
4. Air conditioning No.2 control assy 55-2
5. Wire harness or connector -
1. Blower w/ fan (rear) motor sub-assy 55-7
2. Blower resistor transistor assy 55-7
Air Flow Control : No blower control
3. Air conditioning No.2 control assy 55-2
4. Wire harness or connector -

1. Volume of refrigerant 55-16
2. Drive belt tension 55-29
3. Refrigerant pressure 55-16
4. Heater radiator unit sub-assy 55-7
5. Cooler compressor assy 55-7
Temperature Control : No cool air comes out
6. Pressure switch No.1 55-2
7. Condenser fan -
8. A/C amplifier assy 55-2
9. Air conditioning No.2 control assy 55-2
10.Wire harness or connector -

2005 SIENNA REPAIR MANUAL (RM1163U)

Author : Date : 2941

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