GM Service Manual Online
For 1990-2009 cars only

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 .

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 ON / The transmission is in Park or Neutral / The cruise control On/Off switch is OFF

BPP Circuit Signal

ECM Data

Applied/Released

Released

BPP Signal

ECM Data

Applied/Released

Released

CPP Switch (If Equipped)

ECM Data

Applied/Released

Released

Cruise Control Active

ECM Data

Active/Inactive

Inactive

Cruise Control Switch

Cruise Data

Off/On/Error/Resume/Set

Off

Cruise Control Switch

Cruise Data

0 to 5 Volts

0 Volts

Cruise Control Sw. to Batt. Voltage Ratio

Cruise Data

%

Varies

Cruise Disengage 1-8 History

ECM Data

The last reason for cruise control disengagement

Varies

Engine Speed

ECM Data

RPM

Varies

Ignition 1 Signal

ECM Data

Volts

Varies

Reduced Engine Power

ECM Data

Active/Inactive

Inactive

Traction Control Status

ECM Data

Active/Inactive

Inactive

Vehicle Speed Sensor

ECM Data

km/h (mph)

Varies