B3152

CIRCUIT DESCRIPTION
The switch that failed and generated this diagnostic trouble code (DTC) is wired to either the driver door switch assembly (DDSA) or the passenger door module (PDM). The DDSA or the PDM includes the switch state in the power door serial data message it sends to the driver door module (DDM). The DDM sends the switch message, via the Class 2 serial data link, to the rear integration module (RIM), which is the "master" of all lock operations. The RIM checks all conditions and if all conditions are correct, sends its OK back to the DDM. When the OK message is received, the DDM sends the required signal to all other door modules, via the power door serial data message line.

CONDITIONS FOR RUNNING THE DTC
The DDM and PDM must be powered, in communications with each other and can not have B1327-Battery Voltage Low or B1328-Battery Voltage High set for these DTCs to set.

CONDITIONS FOR SETTING THE DTC
If the DDM receives the message that either a passenger door lock switch circuit is closed for more than 30 continuous seconds or a DDSA lock switch circuit is closed for more than 255 seconds (4.25 minutes), the DDM sets a lock switch circuit DTC.

ACTION TAKEN WHEN THE DTC SETS
The DDM ignores messages for that function (Lock or Unlock) from the switch designated by the DTC and prevents that function from being operated from that switch. The DDM will respond to other, valid lock switch messages.

CONDITIONS FOR CLEARING THE DTC
The DDM clears this current DTC when the switch message is no longer received and stores a history DTC. The history DTC will clear either after 50 OFF/ON ignition switch cycles without a repeated failure or in response to a scan tool command.

TEST DESCRIPTION

Steps 1-10:

The number(s) below refer to the step number(s) on the diagnostic table.
2. Check the module input state using the normal input status.
3. Check to see that the input is seen by the module.
4. Check to see that the signal lines to the module are open with the switch removed.
5. Determine that the signal circuits are not shorted.