Power Door Latch System Components
| • | Remote control door lock receiver (RCDLR) -- GMLAN device that provides
passive keyless entry status information to the DDM and PDM |
| • | Driver door module (DDM) -- GMLAN device that receives door handle
switch inputs and controls the power door latches |
| • | Passenger door module (PDM) -- GMLAN device that receives door handle
switch inputs and controls the power door latches |
| • | Door handle assembly -- includes the lift handle and unlatch enable
switches on the driver and front |
| • | Power door latches -- electrically operated door latches in the driver
and front passenger doors |
| • | DRIVER DR MOD 10 A fuse |
| • | FRT PASS DR MOD 15 A fuse |
Power Door Latch Controls
Control of the power door latches is dependent on the door lock status. If the
status of the door lock system is UNLOCK, the power door latches will electrically
release after lifting the exterior door handle. If the status of the door lock system
is LOCK, one of the following inputs will be required before the latch will release:
| • | A door unlock switch activation |
| • | A door key cylinder unlock switch activation |
| • | An active keyless entry unlock command |
| • | A passive keyless entry unlock command message is received by the DDM
or PDM from the RCDLR |
Once any of the above inputs has been received, the power door latches will
electrically release after lifting the exterior door handle.
The interior door handles provide a mechanical link between the handle and the
latch and requires no electrical inputs or outputs to release the door latch.
For further information on the power door lock status, refer to
Power Door Locks Description and Operation. For further information on the active and passive keyless entry
system, refer to
Keyless Entry System Description and Operation .
Power Door Latch Unlatch Operation
When either exterior door handle is lifted, switched ground signals are sent
to the DDM or PDM and the RCDLR through the LF or RF door handle switch signal circuits.
Upon receipt of these inputs, the DDM or PDM and the RCDLR will check the door lock
status of the system as described above. Once the enable criteria has been met, the
DDM or PDM will supply power and ground to door latch control circuits and the door
will release.
