GM Service Manual Online
For 1990-2009 cars only
Door Switch: The scan tool displays Open or Closed. When a door is opened, the scan tool will display Open. When the door is closed, the scan tool will display Closed.

Driver Door Switch: The scan tool displays Released or Applied. When the driver door is open, the scan tool will display Released. When the driver door is closed, the scan tool will display Applied.

Fob 1-4 Programmed : The scan tool displays Yes or No. The scan tool will display the number of key fobs programmed.

Hazard Lamp Switch : The scan tool displays On or Off. When the hazard switch is depressed, the scan tool will display On momentarily, then Off. When the switch is depressed again, the scan tool will again display On momentarily, then Off.

Hood Open Switch : The scan tool displays Active or Inactive. When the hood is open, the scan tool will display Active. When the hood is closed, the scan tool will display Inactive.

Ignition 1: The scan tool displays ON or OFF. When the intelligent switching unit (ISU) detects ignition 1 is present, the scan tool will display Yes. When the ISU does not detect ignition 1, the scan tool will display OFF.

Ignition 2: The scan tool displays ON or OFF. When the ISU detects ignition 2 is present, the scan tool will display Yes. When the ISU does not detect ignition 2, the scan tool will display OFF.

Left Turn Signal Switch: The scan tool displays Active or Inactive. When the multi-function switch is pulled down, the scan tool will display Active. When the switch is in the normal condition, the scan tool will display Inactive.

Parking Lamps: The scan tool displays On or Off. When the lamp switch is in the Park or Head position, the scan tool will display On. When the switch is in the Off position, the scan tool will again display Off.

Rear Defrost Switch : The scan tool displays On or Off. When the rear defogger switch is depressed, the scan tool will display On momentarily, then Off. When the switch is depressed again, the scan tool will again display On momentarily, then Off.

Right Turn Signal Switch: The scan tool displays Active or Inactive. When the multi-function switch is pushed up, the scan tool will display Active. When the switch is in the normal condition, the scan tool will display Inactive.

Seatbelt: The scan tool displays Buckled or Unbuckled. When the driver seat belt is buckled, the scan tool will display Buckled. When the seat belt is unbuckled, the scan tool will display Unbuckled.

Serial Number: The scan tool displays the ISU serial number for service identification.

Software Version: The scan tool displays the ISU software version for service identification.

System Configuration: The scan tool displays the ISU system configuration for service identification.

Tamper Status: The scan tool displays Active or Inactive. When a key tamper switch (door or trunk key cylinder) is locked or normal position, the scan tool will display Inactive. When the switch is unlocked, the scan tool will display Active.

Trunk Open Switch : The scan tool displays Open or Closed. When the hood is open, the scan tool will display Open. When the hood is closed, the scan tool will display Closed.

Window Down Motor: The scan tool displays Active or Inactive. When the drivers door window switch is in the DOWN position, the scan tool will display Active. When the switch is in the normal or the UP position, the scan tool will display Inactive.

Window Up Motor: The scan tool displays Active or Inactive. When the drivers door window switch is in the UP position, the scan tool will display Active. When the switch is in the normal or the DOWN position, the scan tool will display Inactive.

Wiper Park Switch: The scan tool displays Active or Inactive. When the wipers are parked, the scan tool will display Active. When the wipers are operating, the scan tool will display Inactive.

Wiper Switch: The scan tool displays OFF, Delay or ON. When the switch is turned to the INT position from OFF, the scan tool displays Delay. When the windshield wiper/washer switch is turned to the wash, low, or high positions the scan tool displays ON. Anytime the switch is in the off position the scan tool displays OFF.

Wiper Washer Switch: The scan tool displays Active or Inactive. When the washer switch is engaged, the scan tool will display Active. When the switch is disengaged, the scan tool will display Inactive.