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Home >> GMC >> 1997 >> Jimmy 2D Utility, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.3L >> Diagnostic Trouble Codes >> DTC P1380 - Electronic Brake Control Module EBCM) DTC Detected Rough Road Data Unusable >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK. See the BASIC TESTING - 4.3L article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Disconnect VCM and Electronic Brake Control (EBCM) module connectors. Check for open in serial data circuit between EBCM and VCM. If open is found, go to next step. If open is not found, perform ABS system diagnosis. See the BRAKES SYSTEM - ANTI-LOCK article in the BRAKES section.
  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 DTC P1380. Operate vehicle within conditions required to set DTC. If scan tool displays RAN AND PASSED, go to next step. If scan tool does not display RAN AND PASSED, return to step 2).
  5. Using scan tool, select Read and Record INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, diagnose affected DTCs. If no DTCs are displayed, system is okay.
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