B2202

DTC B2202 Driver Door Unlock Circuit Shorted To Ground/Open:

DTC B2202 Driver Door Unlock Circuit Shorted To Ground/Open (Part 1 Of 2):

DTC B2202 Driver Door Unlock Circuit Shorted To Ground/Open (Part 2 Of 2):

CIRCUIT DESCRIPTION
The driver door unlock circuit is completed by the BCM when it receives a driver door unlock request from any of the door lock switches, or the keyless entry transmitter. The Body Control Module (BCM) grounds circuit 1391, energizing the door lock relay.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to ground or an open in circuit 1391.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2202 in memory.

CONDITIONS FOR CLEARING THE DTC
^ The BCM detects B+ in circuit 1391.
^ A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ The following conditions may cause an intermittent malfunction to occur:
- An intermittent open or short to ground in circuit 1391.
- Poor connections at the BCM, or the door lock relay terminals.
^ The door lock relay coil is open.
^ The BCM is open or shorted to ground internally.
^ An intermittent open in circuit 1540.
^ If the DTC is a history DTC, the problem may be intermittent. Try performing the tests shown while moving wiring and connectors, this can often cause the malfunction to reappear.
^ DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is in the RUN position with the BCM disconnected. When BCM diagnostics and repairs are completed, refer to the Engine Controls for additional information on PCM related DTCs. Powertrain Management

TEST DESCRIPTION
Numbers below refer to the step numbers on the diagnostic table.
2. Checks for voltage in circuit 1391.
3. Determines whether the malfunction is intermittent or the BCM is faulty.
4. Checks for a short to ground in circuit 1391.
5. Determines whether the short to ground is in circuit 1391 or the door lock relay is faulty.
6. Checks for an open in circuit 1391.
8. Determines whether circuit 1540 is open or the door lock relay is faulty.