GM Service Manual Online
For 1990-2009 cars

The scan tool data list contains all the instrument panel, gages, and console related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The data list column indicates the location of the parameter within the scan tool menu selections.

Use the scan tool data list as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Instrument Cluster .

Use the scan tool data list only after the following is determined:

    • There is no published DTC procedure nor published symptom procedure for the customer concern.
    • The DTC or symptom procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are obtained from a properly operating vehicle under the conditions specified in the first row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the typical data values may reveal the source of the customer concern.

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling at Normal Operating Temperature/Transmission in Park

ECT Sensor

Engine 1

Engine 2

EGR Data

Fuel Trim Data

Misfire Data

Enhanced EVAP Data

Celsius (Fahrenheit)

Varies

Engine Oil Life Remaining

Engine 2

0-100%

Varies

Engine Oil Pressure Sensor

Engine 2

0 - 5 Volts

Varies

Engine Speed

Engine 1

Engine 2

EGR Data

Fuel Trim Data

Enhanced EVAP Data

TAC Data

Cruise Control Data

RPM

±100 RPM from Desired Idle Speed

Ignition 1 Signal

Engine 1

Engine 2

EGR Data

Fuel Trim Data

Enhanced EVAP Data

TAC Data

Cruise Control Data

0 - 25 Volts

Varies

MIL Command

Engine 2

On/Off

Off

Reduced Engine Power

Engine 1

EGR Data

TAC Data

Cruise Control Data

Active/Inactive

Inactive

Vehicle Speed Sensor

Engine 1

Engine 2

EGR Data

Fuel Trim Data

Misfire Data

Enhanced EVAP Data

TAC Data

Cruise Control Data

km/h (mph)

0 km/h (0 mph)