GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM) Data List
Table 2: DSCC Data List
Table 3: Cruise Disengagement 1 - 4
Table 4: Engine Control Module (ECM)

The scan tool data lists contain all the distance sensing cruise control (DSCC) related parameters that are available on the scan tool for the adaptive cruise control (ACC) system. 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 Control Module (BCM) Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON / Vehicle is in Park or Neutral / Cruise On/Off is Turned Off

ACC Gap Switch

BCM

Inactive / Up / Down

Inactive

ACC Gap Switch

BCM

Volts

Varies

Cruise Control Switch

BCM

Off / On / Error / Resume / Set

Off

Cruise Control Switch

BCM

Volts

Varies

Cruise Control Sw. to Batt. Voltage

BCM

Percent

Varies

DSCC Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON / Vehicle is in Park or Neutral / Cruise On / Off Switch is Turned Off

Alert Indicator Message

Data

On/Off

Off

Alignment Error

Data

Degrees

Varies

ACC Amp. Audible Alert

Data

Ready/Not Ready

Ready

Angle to Closest Target

Data

Degrees

0.000°

Auto Alignment Learn Status

Data

Aligned/Not Aligned

Aligned

Automatic Braking Status

Data

Ready/Not Ready

Not Ready

Clean Radar Indicator Message

Data

On/Off

Off

Cruise Engaged Indicator Message

Data

On/Off

Off

Cruise On / Off Switch Status

Data

Active/Inactive

Active

Cruise Ready Indicator Message

Data

On/Off

Off

Driver Selected Speed

Data

Km/h (mph)

0 mph

Driver Throttle Override Status

Data

Active/Inactive

Inactive

Follow Speed

Data

km/h (mph)

Varies

Following Distance

Data

0-6

0-6

HUD Virtual Device

Data

Present/Not Present

Present

Ignition Voltage Signal

Data

Volts

Varies

Radar Activated

Data

Yes/No

No

Range

Data

Meters

150

Service Radar Indicator Message

Data

On/Off

Off

Stoplamp Signal

Data

On/Off

Off

Target Found this Ignition

Data

Yes/No

No

Vehicle Ahead Indicator Message

Data

On/Off

Off

Cruise Disengagement 1 - 4

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON / Vehicle is in Park or Neutral / Cruise On / Off Switch is Turned Off

ABS Active

Cruise Disengagement 1-4

Yes/No

No

ABS Malfunction

Cruise Disengagement 1-4

Yes/No

No

ACC Ready

Cruise Disengagement 1-4

Yes/No

No

ACC Configuration

Cruise Disengagement 1-4

Yes/No

No

ACC Amp. Not Ready

Cruise Disengagement 1-4

Yes/No

No

Brake Pedal Pressure Detected

Cruise Disengagement 1-4

Yes/No

No

Brake Pedal Travel Detected

Cruise Disengagement 1-4

Yes/No

No

Brakes Overheated

Cruise Disengagement 1-4

Yes/No

No

Cruise Control Malfunction

Cruise Disengagement 1-4

Yes/No

No

Cruise Control Switch Malfunction

Cruise Disengagement 1-4

Yes/No

No

Cruise Control Switch Off

Cruise Disengagement 1-4

Yes/No

No

ECM Cruise Disengage

Cruise Disengagement 1-4

Yes/No

No

HUD Malfunction

Cruise Disengagement 1-4

Yes/No

No

Internal DSCC Overtemp

Cruise Disengagement 1-4

Yes/No

No

Invalid Vehicle Speed

Cruise Disengagement 1-4

Yes/No

No

Not in Run Mode

Cruise Disengagement 1-4

Yes/No

No

Radar Needs Cleaning

Cruise Disengagement 1-4

Yes/No

No

Supply Voltage Out of Range

Cruise Disengagement 1-4

Yes/No

No

Yaw Rate Invalid

Cruise Disengagement 1-4

Yes/No

No

Engine Control Module (ECM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON / Vehicle is in Park or Neutral / Cruise On / Off Switch is Turned Off

Cruise Control Switch

Engine Data

Invalid/Cancel/Set/Coast/Resume/Accel./On/Off

On

Cruise Control Active

Engine Data

Yes/No

No

Cruise Disengage 1-8 History

Engine Data

Last (8) reasons for cruise control disengagement

Varies

Cruise Inhibit Reason

Engine Data

Reason for cruise inhibit

Varies

Cruise Inhibit Signal Command

Engine Data

On/Off

Off

Engine Speed

Engine Data

RPM

Varies

Initial Brake Apply Signal

Engine Data

Applied/Released

Released

Moderate Brake Apply Signal

Engine Data

Applied/Released

Released

Stoplamp Pedal Switch

Engine Data

Applied/Released

Released

Vehicle Speed Sensor

Engine Data

km/h (mph)

0 km/h (0 mph)