Endgate Electrical Concerns B3966 B3967 - keywords actuator chafe code DTC glass inoperative latch lock performance rear window wire

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

There are 3 known electrical concerns with the endgate.

First concern

An XUV may exhibit a condition of intermittent operation of the endgate drop and swing functions. If diagnosis with a scan tool reveals a DTC B3967, the condition may be occurring due to chaffing in the wire harness for the endgate latch actuators.

Second Concern

If a history DTC B3966 has been set, it may be due to an out-of-range condition for the endgate window position that was set during initial cycling of the glass.

Third Concern

If there is a loss of endgate function and loss of Class2 communication with the endgate module, it may be due to a loss of Battery power to the endgate module

1. Carefully inspect the harness inside the endgate for evidence of pinched or exposed wires. Pinched/chafed wires have been found inside the end gate within approximately 8 inches of the latch actuator connectors for the upper right and/or lower left latches.
2. This DTC should be cleared and then a Tech 2 endgate re-learn procedure should be performed with the endgate swung open. Then the gate should be closed and window full up and full down operations should be performed followed by other gate functional checks including rear wiper, and drop/swing operations to confirm that the fault condition does not return. If this procedure does not correct the condition then perform the diagnostic procedures in SI and repair as necessary.
3. Circuit 2740 should be checked to see if an open circuit condition exists at the body to endgate connector C900. Look for backed-out or poorly crimped terminals in the connector.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.