Grand Cherokee 2WD Limited V8-4.7L (2002)
The DDM and PDM are powered by a fused battery circuit so that they can operate regardless of the ignition switch position. The DDM and PDM
circuitry is grounded to the chassis beneath the front seat.
The DDM and PDM can be diagnosed using a DRBIII scan tool. Refer to the appropriate diagnostic information.
HARD WIRED INPUTS
The hard wired inputs to the door modules include the following:
^
Door ajar switch sense
^
Driver door key cylinder switch sense (DDM)
^
Fused B(+)
^
Ground
^
Memory switch mux (DDM)
^
Mirror horizontal position signal
^
Mirror vertical position signal
^
PCI bus
HARD WIRED OUTPUTS
The hard wired outputs of the door modules include the following:
^
Courtesy lamp driver
^
Courtesy lamp ground
^
Diagnostic out (DDM)
^
Dooliftgatete lock driver
^
Door/liftgate unlock driver
^
Door switch illumination (rear power window)
^
Front window driver (down)
^
Front window driver (up)
^
Memory set indicator driver (DDM)
^
Memory switch return (DDM)
^
Mirror common driver Mirror heater ground
^
Mirror heater 12V supply
^
Rear window driver (down)
^
Rear window driver (up)
^
Mirror horizontal driver
^
Mirror sensor ground
^
Mirror vertical driver
^
PCIbus
^
Switch illumination driver (memory - DDM)
MESSAGING
The door modules use the following messages received from other electronic modules over the PCI data bus:
^
Accessory Delay Control (PDM)
^
Courtesy Lamp Status (BCM)
^
Door Ajar Status/Rear Doors (BCM)
^
Door Lock Status (DDM/PDM)
^
Ignition Switch Position (BCM)
^
Key-In Ignition Status (BCM)
^
Programmable Features Preferences/Auto Lock/Auto Unlock/RKE Unlock Sequence/RKE Link to Memory (EVIC)
^
Memory Recall (DDM)
^
Rear Window Defogger Relay Status (BCM)
^
Vehicle Speed (PCM)
The door modules provide the following messages to other electronic modules over the PCI data bus:
^
Cylinder Lock Switch Status (BCM)
^
Door Ajar Status/Front Doors (BCM/DDM/PDM)
^
Door Lock Status (DDM/PDM)
^
Memory Recall (PDM/MHSM/MSM/Radio)
^
Memory Set Switch Status (PDM/MHSM/MSM/Radio)
^
Panic Control (BCM)
