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Home >> Isuzu >> 1999 >> Trooper Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P1380: Abs Rough Road Abs System Fault >> Diagnostic Aids

Diagnostic Aids

PCM monitors ABS fault signal. When PCM receives fault signal, PCM will set DTC P1380. Check for PCM and ABS communication line short circuit.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Turn ignition on, engine off. Review and record scan tool failure records data. Operate vehicle within failure records condition. Using scan tool, monitor DTC information for DTC P1380 and misfire DTCs. If scan tool shows DTC P1380 and misfire DTCs passed this ignition, clear DTC. If scan tool shows DTC P1380 and misfire DTCs failed this ignition, see appropriate ANTI-LOCK article in BRAKES. If problem is still present, repeat this step. If repeating this step does not correct problem, go to next step.
  3. Check for short between ABS ECU and PCM communications lines. Repair as necessary. If a short circuit is not present, replace PCM.
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