B2222

DTC 82222 RF Door Lock/Unlock Switch Stuck in Lock:

CIRCUIT DESCRIPTION
The RH Front Power Door Lock Switch provides a RH Front seat occupant with the ability to initiate a lock all doors signal.

Whenever the Power Door Lock Switch is moved to the LOCK position, a ground is provided on the RH Front Door Module connector C1, terminal 1 input, via CKT 244 (LT BLU).

The Power Door Lock Switch ground is provided from the RH Front Door Module via CKT 451 (BLK/WHT). If CKT 451 (BLK/WHT) is open the RH Front power window will also exhibit problems, since both the Power Door Lock Switch and the Power Window Switch share a common ground.

RFDM power is furnished through CKT 740 (ORN). If CKT 740 (ORN) is open or shorted to ground, the RH Front power window will also exhibit problems.

When this Power Door Lock Switch is placed in the LOCK position, the lock signal is sensed by the RFDM which then sends a message to the LFDM over the SBI. The LFDM sends a message to the Rear Interface Module (RIM), requesting a command to lock all doors, since the RIM is the door lock master. Any problem with the SBI or LFDM will affect all door lock and window functions.

CONDITIONS FOR SETTING THE DTC
If the LOCK signal to the RH Front Door Module remains grounded for a period of 30 seconds, this DTC will be set current. The LOCK signal from CKT 244 (LT BLU) is examined by the RH Front Door Module no less than once every 300 milliseconds.

The diagnostic for this DTC will not run if either the Battery Voltage High (DTC B1982) or Battery Voltage Low (DTC B1983) are set.

ACTION TAKEN WHEN THE DTC SETS
This DTC is dynamic, and as such, is current only while the problem is present. This switch actuation will be ignored by the RFDM until a switch change of state is detected.

CONDITIONS FOR CLEARING THE DTC
^ This DTC will be set from current to history when the LOCK input cycles off or the power mode changes from OFF to RUN.
^ The history DTC will clear after 50 ignition cycles.
^ The scan tool or the vehicle On Board Diagnostic System can be used to clear the history DTC.

DIAGNOSTIC AIDS
^ A history DTC is evidence of a intermittent problem, clear the DTC and cycle the ignition switch from OFF to RUN. Then perform the Diagnostic System Check.
^ If DTC B2222 is current, cycle the ignition switch from OFF to RUN. If this DTC is still current, perform the following diagnostic.

TEST DESCRIPTION
Numbers below refer to the Diagnostic Table Step Number(s).
2. This step tests the RH front power door switch for an internal short.
6. This step test CKT 244 for a short to ground.