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Home >> Cadillac >> 1996 >> DeVille Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1571 - Traction Control System Pulse Width Modulated (PWM) Circuit No Frequency >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
  2. Using scan tool, check for ABS/TCS related DTC(s). If DTC(s) are present, diagnose affected DTC(s) first. If other DTC(s) are not present, go to next step.
  3. Check for intermittent terminal connection, intermittent open or short to the desired torque PWM input circuit between PCM connector C2 and EBTCM harness connector terminals. Repair as necessary. If circuit or terminal is okay, fault is not present. See DIAGNOSTIC AIDS.
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