GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

The body control module (BCM) controls the PASS-Key® II theft deterrent system. Refer to Body Control System Operation in Body Control System.

Diagnostic Trouble Codes (DTCs)

The following DTCs may be set by the BCM. The DTCs are related to the PASS-Key® II:

    •  DTC B1000 ECU Malfunction
    •  DTC B1339 Device Power #3 Circuit Open
    • B2957
    • B2958
    •  DTC B2960 Sec Sys Sensor Data Incorrect but Valid
    •  DTC B3031 Security System Controller in Learn Mode
    •  DTC B3094 No Response from ECM/PCM Received

Refer to Scan Tool Diagnostics