B3147

For a full page schematic, refer to Door Lock/Indicator Schematics.

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

CIRCUIT DESCRIPTION
The Body Control Module (BCM) monitors and supplies an output voltage on CKT 194. When the BCM receives an unlock command from the remote control door lock receiver the BCM supplies voltage on circuit 194 to unlock the passenger door.

CONDITIONS FOR RUNNING THE DTC
^ The system voltage must be between 9.0 and 16.0 volts.
^ The key fob and or door locks must be activated to lock/unlock the doors.

CONDITIONS FOR SETTING THE DTC
^ When the BCM receives an unlock signal to unlock the passenger door from the remote control door lock receiver module and circuit 194 is shorted to ground.
^ The system voltage must be between 9.0 volts and 16.0 volts.
^ The above conditions must be met for 0.25 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The door lock system will not unlock the passenger door from the key fob.
^ The door lock switches will not lock or unlock the doors.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A current DTC will clear after the next fault free passenger door unlock cycle.
^ A history DTC will clear after 100 consecutive ignition cycles without a fault present.
^ History and current DTC(s) can be cleared using a scan tool.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Listen for an audible click when the Unlock Relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Verifies that the Body Control Module (BCM) is providing voltage to the Unlock Relay.
4. Tests for an open in the ground circuit to the Unlock Relay.
5. Tests if voltage is constantly being applied to the Unlock Relay.
12. After replacement of the BCM you must calibrate the new module for proper operation.