GM Service Manual Online
For 1990-2009 cars only
Battery Voltage: The scan tool displays 9.0-16.0 volts. This is the state of charge of the vehicles battery.

Battery Voltage Signal 2: The scan tool displays the battery voltage as seen at the liftgate module.

Door Lock Actuator Cmd.: The scan tool displays Off/Lock/Unlock. This is the lock/unlock output from the driver door switch (DDS) to the driver door lock actuator.

Door key Cyl. Unlock Switch: The scan tool displays Idle/Unlock. This is the unlock input to the driver door switch (DDS) from the exterior door key cylinder switch. When the key is turned to lock the door, the switch transition to the lock position is displayed as Lock.

Driver Door Ajar Sw.: The scan tool displays Active/Inactive, the driver door ajar switch input to the driver door switch (DDS), where an open door is displayed as Active.

Drvr. Door Unlock Cmd.: The scan tool displays Off/On. This is the unlock output from the driver door switch (DDS) to the body control module (BCM) requesting all doors be unlocked. The DDS communicates with the BCM via GMLAN serial data. When the DDS communicates an unlock command over the serial buss the scan tool will display On.

Driver Door Open Sw.: The scan tool displays Active/Inactive, the driver door open switch input to the driver door switch (DDS), where an open door is displayed as Open.

Ext. Trunk/Liftgass Rel. Sw.: The scan tool displays Active/Inactive. This is the input to the body control module (BCM) from the exterior liftgate release switch. When the switch is activated to open the liftgate, the scan tool will display Active.

Hall Sensor Feed Status: The scan tool displays No Output/Short to Ground. Than scan tool will display any faults associated with the hall sensor while in motion.

Int. Trunk/Liftgass Sw.: The scan tool displays Active/Inactive. This is the input to the body control module (BCM) from the interior liftgate release switch. When the switch is activated to open the liftgate, the scan tool will display Active.

Left Rear Door Ajar Sw.: The scan tool displays Door Ajar/Door Closed. The left rear door ajar switch input to the body control module (BCM), where an open door is displayed as Door Ajar.

Liftgate Handle Switch Status: The scan tool displays Active/Inactive. The scan tool the status of the liftgate handle switch and the liftgate close switch.

Liftgate Ajar Switch: The scan tool displays Active/Inactive. The scan tool displays the state of the liftgate ajar switch as seen at the rear integration module.

Liftgate Lock Status: The scan tool displays Locked/Unlocked. This is the liftgate lock switch input to the body control module (BCM). Switch transitions to the lock and unlock positions are displayed as Locked and Unlocked.

LGM Clutch Actuator Command: The scan tool displays Active/Inactive. The scan tool displays the commanded state of the liftgate clutch.

LGM Latch Motor Cinch Command: The scan tool displays Active/Inactive. The scan tool displays the commanded state of the cinching portion of the liftgate latch.

LGM Latch Pawl Switch: The scan tool displays Active/Inactive. The scan tool displays the state of the liftgate open switch.

LGM Latch Ratchet Switch: The scan tool displays Active/Inactive. The scan tool displays the state of the liftgate ajar switch.

LGM Motor Release Command: The scan tool displays Active/Inactive. The scan tool displays the commanded state of the release portion of the liftgate latch.

LGM Latch Sector Switch: The scan tool displays Active/Inactive. The scan tool displays the state of the liftgate conch/release switch.

LGM Motor Closed Command: The scan tool displays Active/Inactive. The scan tool displays the commanded state of the liftgate motor during closing.

LGM Motor Open Command: The scan tool displays Active/Inactive. The scan tool displays the commanded state of the liftgate motor during opening.

LGM Open/Close Position Learned: The scan tool displays Yes/No. The scan tool displays the results of the liftgate calibration.

LGM Full Open Switch: The scan tool displays Active/Inactive. The scan tool displays the status of the liftgate full open switch.

Object Detection Sensor Status: The scan tool displays the voltage as seen through the object sensors.

Passenger Door Ajar Sw.: The scan tool displays Active/Inactive, the passenger door ajar switch input to the passenger door switch (PDS), where an open door is displayed as Active.

Passenger Door Open Sw.: The scan tool displays Active/Inactive, the passenger door open switch input to the passenger door switch (PDS), where an open door is displayed as Open.

Passenger Door Open Sw.: The scan tool displays Open/Closed, the rear passenger door open switch inputs to the body control module (BCM), where an open rear door is displayed as Open.

Passenger Lock Actuator Cmd.: The scan tool displays Off/Lock/Unlock. This is the lock/unlock output from the passenger door switch (PDS) to the passenger door lock actuator.

Rear Doors Lock Cmd.: The scan tool displays Off/On. This is the lock output from the body control module (BCM) requesting all rear doors be locked. The DDS communicates with the BCM via GMLAN serial data. When the DDS communicates an lock command over the serial buss to the BCM, the BCM responds by locking the rear doors. The scan tool will display On.

Rear Doors Unlock Cmd.: The scan tool displays Off/On. This is the unlock output from the body control module (BCM) requesting all rear doors be unlocked. The DDS communicates with the BCM via GMLAN serial data. When the DDS communicates an unlock command over the serial buss to the BCM, the BCM responds by unlocking the rear doors. The scan tool will display On.

Right Rear Door Ajar Sw.: The scan tool displays Door Ajar/Door Closed. The right rear door ajar switch input to the body control module (BCM), where an open door is displayed as Door Ajar.