Step
| Action
| Normal Results
| Abnormal Results*
|
1
|
- Start the engine.
- Move the blower speed selector switch to the following positions
in the following order:
| The
blower motor speed increases at each speed level when you turn the blower
speed selector switch towards the HIGH position.
|
|
2
|
| • | Run the engine at idle until the operating temperature is reached. |
| • | Move the blower speed selector switch to any position except OFF. |
| • | Move the mode control to the VENT position. |
| • | Move the temperature control to the coldest position. |
|
| • | The blower motor operates at the selected speed. |
| • | Ambient air enters the passenger compartment through the instrument
panel outlets. |
|
| • | Heat Excessive (Vent Mode) |
| • | Heat Excessive (Heat Mode) |
| • | High or Low Temperature Control Effort |
| • | Air Delivery Improper |
|
3
|
| • | Move the blower speed selector switch to any position except OFF. |
| • | Move the mode control to the HEAT position. |
| • | Move the temperature control to the hottest position. |
|
| • | The blower motor operates at the selected speed. |
| • | Heated air enters the passenger compartment. |
| • | Most of the heated air comes through the floor outlets. Some
air comes through the windshield outlets and through the side window outlets. |
|
| • | Heat Excessive (Vent Mode) |
| • | Heat Excessive (Heat Mode) |
| • | High or Low Temperature Control Effort |
| • | Air Delivery Improper |
|
4
|
| • | Move the blower speed selector switch to any position except OFF. |
| • | Move the mode control to the DEFROST position. |
| • | Move the temperature control to the hottest position. |
|
| • | The blower motor operates at the selected speed. |
| • | Heated air enters the passenger compartment. |
| • | Most of the heated air goes to the windshield. Some air goes through
the side window outlets and through the floor outlets. |
|
| • | Heat Excessive (Vent Mode) |
| • | Heat Excessive (Heat Mode) |
| • | High or Low Temperature Control Effort |
| • | Air Delivery Improper |
|
5
|
- Move the blower speed selector switch to any position except the
OFF position.
- Move the temperature control to the coldest position.
- Press the air conditioning (A/C) switch to the ON position.
|
| • | The blower motor operates at the selected speed. |
| • | The A/C compressor clutch engages. |
| • | The A/C condenser fan motor operates. |
| • | Cold air enters the passenger compartment. |
| • | The A/C compressor control module may cycle the A/C compressor
clutch and the A/C condenser fan motor ON and OFF. |
|
| • | TXV A/C System Diagnosis (Insufficient Cooling) |
| • | TXV A/C System Diagnosis (Reference Table) |
|
6
| Turn the A/C switch to the OFF position.
|
| • | The A/C compressor clutch disengages. |
| • | The fan motor of the A/C condenser stops operating. |
|
|
* Refer to the appropriate symptom diagnostic table for
the applicable abnormal result.
|
