B3270

CIRCUIT DESCRIPTION
The driver and front passenger door lock switches provide a path to ground for the driver door lock switch signal circuit to the body control module (BCM) through a 470 ohm resistor when the door lock switch is activated to the lock position. This input is used by the BCM to control the door locks.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to ground through 470 ohms of resistance in the driver door lock switch signal circuit for greater than 60 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM stores DTC B3270 in memory.
^ The BCM will disable the input and all operations of the input until the fault no longer exists.

CONDITIONS FOR CLEARING THE DTC
^ The BCM no longer detects the short to ground through 470 ohms of resistance in the driver door lock switch signal circuit for greater than 60 seconds.
^ 100 consecutive ignition cycles have been recorded without the DTC being detected.

DIAGNOSTIC AIDS
^ If DTC B3270 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.
^ A door lock switch intermittently shorted to ground through the 470 ohm resistor may cause the intermittent malfunction to occur.

TEST DESCRIPTION

Steps 1-6:

The numbers below refer to the step numbers on the diagnostic table.
2. Determines whether the DTC is current or intermittent.
3. Determines whether the driver or front passenger door lock switch is shorted to ground.