Normal Scan Data Values

SCAN TOOL DATA LIST




The HVAC Scan Tool Data List contains all HVAC related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the HVAC Scan Tool Data List only after the following is determined:
- The Diagnostic System Check - Vehicle is completed.
- No diagnostic trouble codes (DTCs)
- On-board diagnostics are functioning properly.

Scan tool values from a properly functioning HVAC system may be used for comparison with the system you are diagnosing. The HVAC Scan Tool Data List represents values that would be seen on a normal system.

IMPORTANT: A scan tool that displays faulty data should not be used. The scan tool problem should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service data for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - HVAC Systems - Manual for diagnosis. Symptom Related Diagnostic Procedures

The column labeled Data List indicates where a parameter can be located on the scan tool. Refer to the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:

All: The Parameter is in all of the data lists indicated below.

Cooling/HVAC: Cooling/HVAC Data List

Eng: Engine Data List

EE: Enhanced Evaporative Emission (EVAP) Data

FT: Fuel Trim Data List

H2: Heated Oxygen Sensor (HO2S) Data List

IG: Ignition System Data List

MF: Misfire Data List

OD: Output Driver Data List

TAC; Throttle Actuator Control (TAC) Data List