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Diagnostic Aids

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

An intermittent short to ground in the 12 volt reference circuit will set the code. Inspect for loose or poor connections at all related components. Refer to TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS in Wiring Systems.

DTC B1397

Step Action Yes No
Schematic Reference: 
Connector End View Reference:  MASTER ELECTRICAL COMPONENT LIST  in Wiring Systems
1 Did you perform the diagnostic system check for the system exhibiting the symptom? Go to Step 2  Go to Control Module References 
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Receive the BCM's DTCs.
Is the respective DTC received as a current DTC?		 Go to Step 3  Go to Diagnostic Aids
3
  1. Turn OFF the ignition.
  2. Disconnect the connector 1 of the BCM.
  3. Test the steering wheel switch, rear wiper/washer switch supply voltage circuit at the BCM connector 1 for a short to ground.
  4. Refer to the following, in Wiring Systems:
Did you find and correct the condition?		 Go to Step 6  Go to Step 4 
4 Inspect for poor connections at the harness connectors of the BCM. Refer to TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS and CONNECTOR REPAIRS in Wiring Systems.
Did you find and correct the condition?		 Go to Step 6  Go to Step 5 
5
IMPORTANT: Perform the module programming or setup procedure, if required.
Replace the BCM. Refer to Body Control Module Replacement Did you complete the replacement?		 Go to Step 6  -
6
  1. Reconnect all of the disconnected modules.
  2. Use the scan tool in order to clear the DTCs.
  3. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 Go to Step 2  System OK
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