GM Service Manual Online
For 1990-2009 cars only
Arming Status: The scan tool displays Active/Inactive. The scan tool will display active when the content theft deterrent (CTD) system is armed.

Auto Learn Counter: The scan tool displays 0-3. The scan tool displays the current state of the Auto Learn Timer Counter. The Auto Learn Counter must increment a total of 3 times in order for the relearn procedure to be complete.

Auto Learn Timer: The scan tool displays 0-10 minutes. The scan tool displays the current state of the Auto Learn Timer which increments in 10 second intervals. The Auto Learn Timer must time out 3 times in order for the relearn procedure to be complete.

Battery Voltage Signal: The scan tool displays 0-30 volts. The scan tool displays the current battery voltage input.

Battery Voltage Cycled: The scan tool displays Yes/No. The scan tool displays Yes if battery power has been disconnected, then reconnected to the theft deterrent module (TDM).

Content Theft Mode: The scan tool displays Ignition On/Arm Pending/Standby/Sim. Arm. Pend./Trunk Open/Unlocked/Open/Locked/Ignition Lock/Sim. Armed/Armed/Warn Away/Alarm/Audible Only. The scan tool will displays the current state of the CTD system.

CTD Status: The scan tool displays Armed/Disarmed. The scan tool will display Armed when the CTD system is armed.

Door Ajar Switch: The scan tool displays Door Closed/Door Ajar. The scan tool displays the status of the right front, right rear, and left read doors and will display Door Ajar when any of these doors are ajar.

Door Cylinder Switch: The scan tool displays Idle/Lock/Unlock. The scan tool will display the position of the door key cylinder switch.

Door Cylinder Switch: The scan tool displays the current voltage at the door cylinder switch.

Driver Door Ajar Switch: The scan tool displays Door Closed/Door Ajar. The scan tool will display Door Ajar when the drivers front door is ajar.

Fail Enable Counter: The scan tool displays 0-3. The scan tool displays the number of ignition cycles the TDM has been in the fail enable state.

Horn Relay Command: The scan tool displays On/Off. The scan tool will display On when the horn is commanded on.

Ignition Voltage Signal: The scan tool displays 0-18 volts. The scan tool displays the current ignition voltage.

Master Keys Learned: The scan tool displays 0-10. The scan tool displays the number of learned master keys.

PCM Auto Learn Timer: The scan tool displays 0-10 minutes. The scan tool displays the current state of the Auto Learn Timer which increments in 10 second intervals. The Auto Learn Timer must time out 3 times in order for the relearn procedure to be complete.

PCM Fail Enable: The scan tool displays Active/Inactive. The scan tool displays Active when the powertrain control module (PCM) has received a valid fuel continue password from the TDM.

PCM Fuel Continue: The scan tool displays Active/Inactive. The scan tool displays Active when the theft deterrent control module has read a valid key and is sending a fuel continue password via the serial data circuit. The scan tool displays Inactive when the theft deterrent control module has read an invalid key and is sending a fuel disable password via the serial data circuit.

PCM Password Learning: The scan tool displays Active/Inactive. The scan tool displays Active when the TDM is in the password learn state.

Power Mode: The scan tool displays Off/Accessory/Run/Crank Request. The scan tool displays the current ignition state.

Security Indicator Command: The scan tool displays On/Off. The scan tools displays On if the SECURITY telltale is illuminated.

Substitution Timer: The scan tool displays 0-10 minutes. The scan tool displays the current time remaining in the substitution timer.

Tamper Status: The scan tool displays Yes/No. The scan tool displays Yes when the TDM has read a key transponder value that has not been previously learned.

Telltale Status: The scan tool displays On/Off. The scan tools displays On if the SECURITY telltale is illuminated.

Total Keys Learned: The scan tool displays the total number of master and valet keys learned by the TDM.

Transponder Key: The scan tool displays Present/Not Present. The scan tool displays Present when a properly coded vehicle key is detected.

Trunk Ajar Switch: The scan tool displays Trunk Closed/Trunk Ajar. The scan tool will display Trunk Ajar when the truck is open.

TDM Fail Enable: The scan tool displays Yes/No. The scan tool displays On when the TDM has been configured with TDM fail enable.

TDM States: The scan tool displays Ignition Off/Normal Decision/Learn First Key/Tamper/Monitor Key/Fail Enable/Seedkey Lrn Pend/Seedkey Learn/Auto Learn Pend/Auto Learn/Wakeup/Learn More Keys/No Coded Key/Check Second Key/Auto Lrn Done/Vin Check/Vin Timer. The scan tool displays the current state of the TDM.

Valid Key: The scan tool displays Yes/No. The scan tool displays Yes when the TDM has read a valid key transponder.

VIN Message Received: The scan tool displays Yes/No. The scan tool displays Yes when the TDM has received the VIN information.