Decklid/Liftgate Release

The trunk/liftgate release is controlled by the body control module (BCM) circuit 362 providing battery voltage to the release solenoid. The BCM limits the amount of time the solenoid can be activated to 9 seconds to prevent damage to the solenoid. Reactivation may not be allowed for as much as 30 seconds.

Release of the decklid/liftgate can be initiated by either the transmitter or the decklid/liftgate release switch. Activating the decklid/liftgate release switch provides battery voltage to circuit 56. Because remote keyless entry is an internal function of the BCM, no additional external wiring is necessary for transmitter input to the BCM. Decklid/liftgate release is not allowed by the BCM when vehicle speed is detected. The BCM receives vehicle speed serial data from the engine controller. Trunk release in sedan vehicles has a valet switch to limit trunk access.

The BCM also monitors the state of the decklid/liftgate. When circuit 744 is grounded by the ajar switch, the BCM will alert the driver the decklid/liftgate is ajar by turning On the ajar telltale.

Keyless Entry Transmitter
The BCM will set DTC B3109 - Keyless Entry Transmitter Low Battery when the transmitter battery voltage is below 2.5 volts. Nominal battery voltage is 3.0 volts.