B3142

CIRCUIT DESCRIPTION
The switch that tailed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA), Passenger Front Door Module (PDM), Left Rear Door Module (LRDM), or Right Rear Door Module (RRDM). When a door lock switch is activated to the Lock or Unlock function, the DDSA, PDM, LRDM, or RRDM receives the switch input and sends the information on, via the Serial Data Class 2 communications line, to the Rear Integration Module (RIM), which is the master of all lock operations. If the RIM determines that the message is a valid request and conditions are correct for a door lock function to occur, it sends its OK back to all the door modules to Lock or Unlock the doors. Each door module supplies power and ground to its associated lock actuator to Lock or Unlock the associated door.

CONDITIONS FOR RUNNING THE DTC
The DDSA, PDM, LRDM or RRDM must be powered and can not have B1327-Battery Voltage Low or B1328-Battery Voltage High set for this DTC to set.

CONDITIONS FOR SETTING THE DTC
If the DDSA, PDM, LRDM or RRDM detects that its associated switch is closed to a Lock or Unlock function for more than 30 continuous seconds, it sets the DTC.

ACTION TAKEN WHEN THE DTC SETS
The DDSA, PDM, LRDM or RRDM ignores inputs from the associated switch until the switch state changes.

CONDITIONS FOR CLEARING THE MIL/DTC
The current DTC will clear when the DDSA, PDM, LRDM or RRDM no longer detects the failure.

DIAGNOSTIC AIDS
A sticking or binding switch can cause this DTC to set. Refer to Testing for Intermittent and Poor Connections.

TEST DESCRIPTION

Steps 1-10:

The numbers below refer to the step numbers on the diagnostic table.
2. Checks the existing state of the lock switch by using the current state of the input parameter.