B2203

DTC B2203

CIRCUIT DESCRIPTION
The switch or switch circuit that failed and generated this diagnostic trouble code (DTC) is wired to one of the passenger door modules. The passenger door modules each supply battery voltage to the contacts of both the Up and Down signal circuits of their respective power window switch. Each passenger door module also supplies a ground circuit to the associated power window switch. When the normally open contacts of the switch are closed to ground, the associated passenger door module interprets this switch signal and assigns it a digital message. The passenger door module then sends this message over the power door serial data circuit to the driver door module (DDM).

CONDITIONS FOR RUNNING THE DTC
The DDM and the passenger door module associated with the failed power window must be powered and can not have B1327-Battery Voltage Low or B1328-Battery Voltage High set for one of these DTCs to set. If one of the DTCs indicating a loss of communications with a door module is set, the setting of DTCs from that module is prohibited.

CONDITIONS FOR SETTING THE DTC
If the driver door module (DDM) receives a message from a passenger door module indicating that a window switch is closed for more than 15 continuous seconds, the DDM sets the DTC.

ACTION TAKEN WHEN THE DTC SETS
The action taken depends on which switch contacts are closed to ground:
- If an UP switch is closed for more than 15 seconds, both UP and DOWN movement is prohibited.
- If a DOWN switch is closed for more than 15 seconds, the DOWN movement is prohibited but UP movement is permitted.

CONDITIONS FOR CLEARING THE DTC
The DDM clears this current DTC when the switch message is not received, or when the module power mode changes from OFF to RUN, and stores the DTC as history. 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 1-4:

Steps 5-10:

The numbers below refer to the step numbers on the diagnostic table.
2. This step checks the module input state using the normal input status.
3. This step checks to see that the input is seen by the module.
4. This step checks to see that the signal lines to the module are open with the switch removed.
5. This step checks to see that the signal circuits are not shorted.