GM Service Manual Online
For 1990-2009 cars only
Battery Voltage: The scan tool displays the current state of the battery in volts.

Door Lock Relay: The scan tool displays ON/OFF. This output displays the state of the door lock relay. ON is displayed when the body control module is providing battery voltage for the door lock relay when requested by the remote keyless entry key fob.

Door Lock Relay Fdbk.: The scan tool displays Active/Inactive. This input to the BCM displays ON when the BCM senses battery voltage due to the door lock switch being pressed or when requested by the remote keyless entry key fob lock button being pressed.

Driv Door Unlk Fdbk: The scan tool displays Active/Inactive. This input to the BCM displays the state of the driver door unlock relay located inside the BCM. Active is displayed when the BCM is providing battery voltage to the driver door unlock actuator when requested by the remote keyless entry fob unlock button being pressed once.

Driv Door Unlock Relay: The scan tool displays ON/OFF. This output displays the state of the driver door unlock relay located inside the BCM. ON is displayed when the BCM is providing battery voltage to the driver door unlock actuator when requested by the remote keyless entry key fob unlock button being pressed once.

DRL Relay: The scan tool displays On/Off. The scan tool displays the commanded state of the DRL relay.

DRL Relay Fdbk.: The scan tool displays Active/Inactive. Active is displayed momentarily when the remote keyless entry key fob unlock button is pressed.

Horn Relay: The scan tool displays On/Off. The scan tool displays the commanded state of the horn relay.

Horn Relay Feedback: The scan tool displays Active/Inactive. The display will pulse Active and then Inactive repeatedly when the remote keyless entry fob panic alarm button is pressed.

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

Interior Lamp Output: The scan tool displays On/Off to indicate the current state of the interior lamps as commanded by the body control module.

Other Door Unlock Fdbk.: The scan tool displays Active/Inactive. This input to the BCM displays the state of the door unlock relay located inside the BCM. Active is displayed when the BCM senses battery voltage at the door unlock relay due to the vehicle unlock switch being pressed or the remote keyless entry fob unlock button being pressed twice.

Other Door Unlock Relay: The scan tool displays ON/OFF. This output displays the state of the door unlock relay. ON is only displayed when the BCM is providing battery voltage to the door unlock actuator as requested by the remote keyless entry key fob unlock button being pressed twice

Passenger Door Unlock R. : The scan tool displays ON/OFF. On is displayed when the unlock switch is pressed or when the remote keyless entry fob unlock button is pressed twice.

Trunk Release Sol. Fdbk: The scan tool displays Active/Inactive. On is displayed momentarily when the trunk release dash switch is pressed or when the remote keyless entry fob trunk release button is pressed.

Trunk Release Solenoid: The scan tool displays On/Off to indicate the current state of the rear compartment release as commanded by the BCM.