B3137

DTC B3137

CIRCUIT DESCRIPTION
The body control module (BCM) controls the locking function of the door locks in parallel with the door lock switches. The ground is applied to the door lock actuator lock control circuit through the door unlock portion of the door lock/unlock relay. When the BCM applies power to the door lock relay control circuit, the door lock portion of the door lock/unlock relay switches battery positive voltage to the door lock actuator lock control circuit, energizing all of the door lock actuators to lock.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC B3137 All Door Lock Circuit Low
- DTC B3138 All Door Lock Circuit High

CONDITIONS FOR RUNNING THE DTC
The BCM must be commanding the door lock relay to energize all of the door lock actuators to lock.

CONDITIONS FOR SETTING THE DTC
- The BCM detects an open or a short to ground in the door lock relay control circuit while commanding the door lock relay to energize all of the door lock actuators to lock.
- The condition above must be present for more than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B3137 or B3138 in memory.

CONDITIONS FOR CLEARING THE DTC
- An open or a short to ground in the door lock relay control circuit is no longer detected by the BCM.
- A history DTC B3137 or B3138 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

DIAGNOSTIC AIDS
- If the DTC B3137 or B3138 is a history DTC, the fault may be intermittent.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent open or short to ground in the door lock relay control circuit
- The BCM is intermittently open or shorted to ground internally

TEST DESCRIPTION

Steps 1-14:

Steps 15-16:

The numbers below refer to the step numbers on the diagnostic table.
2. Listen for an audible noise when the door lock actuators are commanded to lock. Command the door lock actuators to lock and unlock. Repeat the commands as necessary.
3. This step verifies that the BCM is providing voltage to the door lock relay control circuit.
4. This step tests for an open in the door lock/unlock relay ground circuit.
5. This step tests if voltage is constantly being applied to the door lock relay control circuit.
6. This step tests for a stuck switch.