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Door Systems Diagnostic System Check

  1. Connect scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see TEST A: SCAN TOOL DOES NOT POWER UP  under SYSTEM TESTS.
  2. Turn ignition on. Turn on headlights. Try to establish communication with Driver's Door Module (DDM), Passenger Front Door Module (PFDM), Left Middle Door Module (LMDM), Right Middle Door Module (RMDM) Left Rear Door Module (LRDM), Right Rear Door Module (RRDM), Driver's Door Switch Assembly (DDSA), Instrument Panel Cluster (IPC), Powertrain Control Module (PCM), Rear Integration Module (RIM), Instrument Panel Cluster (IPC), Remote Control Door Lock Receiver (RCDLR) and Memory Seat Module (MSM). If scan tool communicates with all modules listed, go to next step. If scan tool does not communicate with all modules listed, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  3. Cycle ignition switch through all positions. Observe CLASS 2 POWER MODE parameter under DIAGNOSTIC CIRCUIT CHECK on scan tool. If displayed CLASS 2 POWER MODE parameter matches actual ignition switch position, go to next step. If displayed CLASS 2 POWER MODE parameter does not match actual ignition switch position, see TEST C: POWER MODE MISMATCH  under SYSTEM TESTS.
  4. With scan tool, select display DTCs function of each module listed in step  2. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, see POWER DOOR LOCKS - DEVILLE article for further diagnosis.
  5. If scan tool does not display any DTCs that begin with a "U", go to next step. If scan tool displays any DTCs that begin with "U", see TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  6. If scan tool does not display DTC B1004, B1007 or B1009, go to next step. If scan tool displays DTC B1004, B1007 or B1009, see DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  7. If scan tool displays DTC B1327 or B1328, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in GENERATORS & REGULATORS - DEVILLE article in STARTING & CHARGING SYSTEMS. If scan tool does not display B1327 or B1328, diagnose any other DTCs that exist. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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