Use the Scan Tool Data Display Values and Definitions Information in order to assist in diagnosing the HVAC Control Module problems. Compare the vehicles actual scan tool data with the typical data display value table information. Use the data information in order to aid in understanding the nature of the problem when the vehicle does not match with the typical data display values.
The scan tool data values were taken from a known good vehicle under the following conditions:
| • | The ignition switch is in the ON position. |
| • | The engine is running at idle. |
| • | The vehicle is in PARK. |
| • | The doors are closed. |
| • | The windows are closed. |
| • | The A/C is ON. |
| • | The ambient air temperatures are at 22-27°C (70-80°F). |
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F) | |||
Auto Button | Inputs | On/Off | Off |
Calibration ID | Module Information | 8 digit alphanumeric | AE017707 |
Desired Blower Mtr Speed | Data | Counts | 0-111 Counts |
Driver Temp Dial | Data | °C/°F | 23°C/75°F |
Driver Temp Down Button | Inputs | On/Off | Off |
Driver Temp Up Button | Inputs | On/Off | Off |
Dual Button | Inputs | On/Off | Off |
Fan Down Button | Inputs | On/Off | Off |
Fan Up Button | Inputs | On/Off | Off |
Front Defrost Button | Inputs | On/Off | Off |
Inside Temp Sensor | Data | Volts | 2.6 Volts |
LH Mix Mtr Position Feedback | Data | Counts | 1-252 Counts |
LH Mix Mtr Position Requested | Data | Counts | 0-255 Counts |
Mix Motor State | Data | Normal/Initializing | Normal |
Mode Down Button | Inputs | On/Off | Off |
Mode Up Button | Inputs | On/Off | Off |
Off Button | Inputs | On/Off | Off |
Outside Temp Sensor | Data | Volts | 4.3 Volts |
Passenger Temp Dial | Data | Counts | 80-176 Counts |
Passenger Temp Down Button | Inputs | On/Off | Off |
Passenger Temp Up Button | Inputs | On/Off | Off |
Rear Defog Output | Data | On/Off | Off |
Rear Defrost Button | Inputs | On/Off | Off |
Recirculate Button | Inputs | On/Off | Off |
RH Mix Mtr Position Feedback | Data | Counts | 3-227 Counts |
RH Mix Mtr Position Requested | Data | Counts | 0-226 Counts |
Rom ID | Module Information | 8 digit alphanumeric | AE017414 |
ROM Part Number | Module Information | 6 digit alphanumeric | 9F3C04 |
Sun Load Sensor | Data | Volts | 4.3 Volts |
Vacuum Solenoid 1 | Data | On/Off | varies |
Vacuum Solenoid 2 | Data | On/Off | varies |
Vacuum Solenoid 3 | Data | On/Off | varies |
Vacuum Solenoid 4 | Data | On/Off | varies |
Vacuum Solenoid 5 | Data | On/Off | varies |
Vent Button | Inputs | On/Off | Off |
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F) | |||
A/C High Side Pressure | Engine Data 2 | kPa/psi | 1100 kPa/159 psi |
A/C High Side Pressure | Engine Data 2 | Volts | 2.18 Volts |
A/C Off For WOT | Engine Data 2 | Yes/No | No |
A/C Pressure Disable | Engine Data 2 | Yes/No | No |
A/C Relay Circuit Status | Output Driver Data | OK/Fault | OK |
A/C Relay Command | EGR Data Engine Data 1 Engine Data 2 Misfire Data | On/Off | On |
A/C Request Signal | Engine Data 2 | Yes/No | Yes |
ECT Sensor | EGR Data Engine Data 1 Engine Data 2 EVAP Data Fuel Trim Data Misfire Data | Degrees | 99°C (212°F) |
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F) | |||
A/C High Side Pressure | Engine Data 2 | kPa/psi | 1100 kPa/159 psi |
A/C High Side Pressure | Engine Data 2 | Volts | 2.18 Volts |
A/C Off For WOT | Engine Data 2 | Yes/No | No |
A/C Pressure Disable | Engine Data 2 | Yes/No | No |
A/C Relay Circuit Status | Output Driver Data | OK/Fault | OK |
A/C Relay Command | EGR Data Engine Data 1 Engine Data 2 Misfire Data | On/Off | On |
A/C Request Signal | Engine Data 2 | Yes/No | Yes |
ECT Sensor | EGR Data Engine Data 1 Engine Data 2 EVAP Data Fuel Trim Data Misfire Data | Degrees | 99°C (212°F) |
