B3142

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
The Switch that failed and generated this diagnostic trouble code (DTC) is wired to the driver door switch assembly (DDSA). The DDSA processes the inputs from this switch, and then sends a message via the Serial Data Class 2 line to the rear integration module (RIM), which is the master of all lock operations. If the RIM determines that the right conditions are present for unlock activation to take place, it sends its OK back, via the Serial Data Class 2 line, to all of the door modules. Each door module then supplies battery voltage and ground to its associated door lock actuator to Unlock the doors.

CONDITIONS FOR RUNNING THE DTC
The DDSA 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 detects that the circuit is closed for more than 30 continuous Seconds in the unlock position, it sets the DTC.

ACTION TAKEN WHEN DTC SETS
The DDSA ignores inputs from this switch and stops sending messages for it.

CONDITIONS FOR CLEARING THE MIL/DTC
The DDSA clears this DTC when the switch signal is not received during one of the checks of the circuit.

DIAGNOSTIC AIDS
A sticking switch can cause this DTC to be set. Refer to Testing for Intermittent and Poor Connections in Diagrams.

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