GM Service Manual Online
For 1990-2009 cars only
Table 1: Body and Accessories
Table 2: Engine

The scan tool data lists contain all of the cruise control 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 lists as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with Diagnostic System Check - Vehicle in Vehicle DTC Information.

Use the scan tool data lists 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.

Body and Accessories

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: The ignition is ON/The engine is ON/The transmission is in Park or Neutral/The cruise control On/Off switch is OFF

Cruise Control Active

PCM Data

No/Yes

No

Cruise On/Off Switch

PCM Data

On/Off

Off

Cruise Resume/Accel Switch

PCM Data

On/Off

Off

Cruise Set/Coast Switch

PCM Data

On/Off

Off

Engine Speed

PCM Data

RPM

Varies

Ignition 1 Signal

PCM Data

Volts

Varies

Initial Brake Apply Signal

PCM Data

Applied/Released

Released

Stop Lamp Pedal Switch

PCM Data

Applied/Released

Released

Stop Lamp Pedal Switch Signal

PCM Data

Volts

Varies

TAC Stop Lamp Pedal Switch

PCM Data

Applied/Released

Released

Traction Control Status

PCM Data

Active/Inactive

Inactive

Vehicle Speed Sensor

PCM Data

km/h (mph)

0 km/h (0 mph)

Engine

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: The ignition is ON/The transmission is in Park or Neutral/The cruise control On/Off switch is OFF

Reduced Engine Power

TAC Data

Active/Inactive

Inactive

TAC/PCM Communication Signal

TAC Data

Ok/Fault

Ok

TAC Vehicle Speed Signal

TAC Data

Ok/Fault

Ok

Vehicle Speed Circuit History

Output Driver Data

Ok/Open/Short/Invalid State

Ok

Vehicle Speed Circuit Status

Output Driver Data

Ok/Fault/Invalid State

Ok