Chevrolet Trax: DTC B3950
- Ignition OFF, disconnect the X2 harness connector at the K9 Body Control
Module, ignition ON.
- Verify a test lamp illuminates between the B+ circuit terminal 3 and
ground.
- If the test lamp does not illuminate and the circuit fuse is good
- Ignition OFF.
- Test for less than 2 ohms in the B+ circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, verify the fuse is not open and there is voltage at
the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
- Ignition OFF.
- Test for infinite resistance between the B+ circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the K9 Body Control Module.
- If the test lamp illuminates
- Ignition OFF, connect the X2 harness connector at the K9 Body Control
Module.
- Ignition OFF, exterior lamps OFF, rear hatch latch latched, remove the
E4LR Turn Signal Lamp Bulb -
Left Rear.
- Test for less than 5 ohms between the ground circuit at the socket
terminal and ground.
- Ignition OFF.
- Test for less than 2 ohms in the ground circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, repair the open/high resistance in the ground
connection.
- If less than 5 ohms
- Connect a test lamp between the control circuit at the socket terminal
and ground, ignition ON.
- Verify the test lamp turns ON and OFF when commanding the Left Rear Turn
Signal Lamp ON and OFF
with a scan tool.
- If the test lamp is always OFF
- Ignition OFF, disconnect the X5 harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the control circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K9 Body Control Module.
- If the test lamp is always ON
- Ignition OFF, disconnect the X5 harness connector at the K9 Body Control
Module, ignition ON.
- Test for less than 1 V between the control circuit terminal and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K9 Body Control Module.
- If the test lamp turns ON and OFF
- Test or replace the E4LR Turn Signal Lamp Bulb - Left Rear.
READ NEXT:
Ignition OFF, disconnect the X5 harness connector at the K9 Body Control
Module, ignition ON.
Verify a test lamp illuminates between the B+ circuit terminal 3 and
ground.
If the test lamp do
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Ignition OFF, disconnect the harness connector at the B22 Brake Pedal
Position Sensor, ignition ON.
Verify a test lamp illuminates between the appropriate low reference
circuit terminal listed
SEE MORE:
Removal Procedure
WARNING: Refer to Approved Equipment for Collision Repair Warning .
NOTE: The roof front header panel is made of Ultra High Strength
Steel and
should be replaced only at factory joints. Repairing or sectioning of this
part is not recommended. Refer to Ultra High Strength Steel.
Special Tools
BO-24402-A Glass Sealant Remover (Cold Knife)
BO-39032 Stationary Glass Removal Tool
Use an adhesive that is approved by GM
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Open the hood.
Remove the windshield wiper arms. Refer to Windshield Wiper Arm