GM Service Manual Online
For 1990-2009 cars only
Backup Light Request: The scan tool displays Active/Inactive. Displays indicates the commanded state of the backup lamp relay. The scan tool displays Active when the backup lamp relay is grounded and Off when the backup lamp relay is not grounded.

Door Key Unlock: The scan tool displays Active/Inactive. The scan tool displays Active when the door key cylinder is rotated to the unlock position.

Driver Door Ajar Switch: The scan tool displays Open/Closed. Display indicates the current state of the driver door ajar switch. Open indicates the door is open and Closed indicates the door is closed.

Folding Top Ajar Switch (Convertible): The scan tool displays Active/Inactive. The scan tool displays Active when the folding top stowage cover is open and Inactive when the folding top stowage cover is closed.

Hatch/Trunk Ajar Switch: The scan tool displays Open/Closed. Display indicates the current state of the hatch/trunk ajar switch. Open indicates the hatch/trunk is open and Closed indicates the hatch/trunk is closed.

Hood Ajar (Export): The scan tool displays Open/Closed. Display indicates the current state of the hood ajar switch. Open indicates the hood is either open or ajar and Closed indicates the hood is closed.

Ignition 1: The scan tool displays On/Off. The scan tool displays the current state of the ignition switch ignition 1 position.

Key In Ignition: The scan tool displays Active/Inactive. The scan tool displays Active when the ignition key is in the ignition and Inactive when it is not in the ignition.

Left Turn Signal Relay: The scan tool displays Active/Inactive. Displays indicates the commanded state of the left turn signal relay. The scan tool displays Active when the left turn signal relay is grounded and Off when the left turn signal relay is not grounded.

Passenger Door Ajar Switch: The scan tool displays Open/Closed. Display indicates the current state of the driver door ajar switch. Open indicates the door is open and Closed indicates the door is closed.

PASS-Key® Resister Signal: The scan tool displays 0-5.0 volts. The voltage level represents the PASS-Key® resistance value.

Pass-Key® State: The scan tool displays the current PASS-Key® state. This data represents what PASS-Key® functional mode the BCM is in. The BCM enters different PASS-Key® states based upon the information the BCM receives from the ignition switch (switch position and key resistance value).

PCM/VCM in VTD Fail Enable: The scan tool displays Yes/No. The scan tool displays NO when the PCM is in fail enable. This indicates a failure occurred in the VTD system.

Right Turn Signal Relay: The scan tool displays Active/Inactive. Displays indicates the commanded state of the right turn signal relay. The scan tool displays Active when the right turn signal relay is grounded and Off when the right turn signal relay is not grounded.

Theft Deterrent State: The scan tool displays Active/Inactive/Fully Armed/Passive/Alarm. The scan tool displays the state of the CTD system.

VTD Auto. Learn Timer: The scan tool displays Active/Inactive. The scan tool displays the current state of the Auto. Learn Timer, which must time out three times in order for the relearn procedure to be complete.

VTD Fuel Disable: The scan tool displays Active/Inactive. The scan tool displays Active when the PCM has received a disable password from the VTD system.

VTD Fuel Disable Until Ign. Off: The scan tool displays Yes/No. The scan tool displays Yes when the PCM has received the fuel disable password from the VTD system. This indicates the PCM will not allow fuel delivery until the ignition is switched off prior to another start attempt.