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Home >> Oldsmobile >> 2000 >> Bravada >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P1381: Misfire Detected - No Communication With Brake Control Module >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC SYSTEM CHECK . After performing OBD system check, go to next step.
    2. NOTE: If any "U" DTCs are set, diagnose affected DTCs first. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  2. Disconnect VCM and EBCM harness connectors. Check for open in serial data circuit between EBCM and VCM. If circuit is open, go to next step. If circuit is okay, perform ABS system diagnosis. See appropriate ANTI-LOCK article in BRAKES.
  3. Repair as necessary. After repairs, go to next step.
  4. Using scan tool, select DTC, CLEAR INFO function. Start engine and allow it to reach operating temperature. Using scan tool, select DTC, SPECIFIC function and enter this DTC. Operate vehicle within conditions required to set DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  2.
  5. Using scan tool, select Read and Record INFO, REVIEW INFO function. Check if any undiagnosed DTCs are displayed. Diagnose affected DTCs. If no additional DTCs are displayed, system is okay.
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