For 1990-2009 cars

Table 1: | Body Control Module (BCM) Scan Tool Data List
Table 2: | PCM Scan Tool Data List

Use the Scan Tool Data Display Values and Definitions Information in order to assist in diagnosing the HVAC Control Assembly 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).

#### Body Control Module (BCM) Scan Tool Data List

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 Clutch Mode | BCM Data | Clutch Enabled OFF/LOW RPM A/C Requested OFF A/C Clutch OFF/HIGH Pressure | Clutch Enabled
A/C Request | BCM Data | Yes/No | Yes

#### PCM Scan Tool Data List

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 | 793 kPa/115 psi
A/C High Side Pressure | Engine Data 2 | Volts | 1.5 Volts
A/C Pressure Disable - 3.4L Only | Engine Data 2 | Yes/No | No
A/C Relay Circuit Status - 3.4L Only | Output Driver Data | OK/Fault | OK
A/C Relay Command | EGR Data Engine data 1 Engine Data 2 Engine Data 3 (2.2L Only) Misfire Data | On/Off | On
A/C Request Signal | Engine Data 2 | Yes/No | Yes