GM Service Manual Online
For 1990-2009 cars only

Scan Tool Data List L81

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine Idling at normal operating temperature/Transmission in Park or Neutral/Cruise Control On/Off Switch Off

Battery Voltage

Idle/Speed Control

Volts

Varies

Brake Switch

Idle/Speed Control

Applied/Released

Released

Cruise Brake Switch

Idle/Speed Control

Applied/Released

Released

Cruise Resume/Accel

Idle/Speed Control

On/Off

Off

Cruise Set/Coast

Idle/Speed Control

On/Off

Off

Cruise Switch

Idle/Speed Control

On/Off

Off

Engine Speed

Idle/Speed Control

RPM

Varies

Vehicle Speed

Idle/Speed Control

km/h (mph)

0 km/h (0 mph)

Scan Tool Data List L61

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Key ON , Engine OFF, Transmission in Park

Cruise Brake Switch / Clutch Switch

General Info, Inputs

Released/Applied

Released

Cruise Control Engaged

General Info, Inputs

Yes / No

No

Cruise Enable

Engine Output Controls

On / Off

On