Conditions for Clearing the DTC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

DTC B0051 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

DTC B0051

Step	Action	Yes	No
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views
1	Did you perform A Diagnostic System Check - SIR?	Go to Step 2	Go to Diagnostic System Check - SIR
2	Turn OFF the ignition. Inspect the vehicle for signs of inflator module(s) deployment. Does the vehicle show any signs of inflator module(s) deployment?	Go to Step 5	Go to Step 3
3	Inspect the front of the vehicle and undercarriage for signs of impact/collision. Does the vehicle show any signs of impact/collision?	Go to Step 5	Go to Step 4
4	Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Did you complete the replacement?	Go to Step 6	-
5	Install a scan tool. With a scan tool, observe the SIR DTC display. If a history DTC exists, refer to Diagnostic Aids for that specific DTC and diagnose the problem. Replace components and perform inspections as required following an accident. Refer to Repairs and Inspections Required After a Collision . Did you complete the action?	Go to Step 6	-
6	Reconnect all SIR components. Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?	Go to Step 2	System OK