Engine Controls - Tests W/Codes

• Introduction
  • Notes
  • Self-Diagnostic System
    • Hard Failures
    • Intermittent Failures
  • Retrieving Trouble Codes
    • Notes
    • Normal Mode
    • Test Mode
  • Notes On Trouble Codes
  • Clearing Trouble Codes
  • ECM Location
• Trouble Code Diagnostic Hints
• Trouble Code Identification
• Trouble Code Charts
  • ECM Terminal Identification
  • Diagnostic Circuit Check
  • Test No. 1 ECM (+B) Circuit Check
  • DTC 12 & 13 - Rpm Signal
  • DTC 14 - Ignition Signal
  • Code 16 - Electronic-Controlled A/T Signal
  • DTC 21 & 27 - Oxygen Sensor Signal
  • DTC 22 - Engine Coolant Temperature Signal
  • DTC 24, 31, 32 - Intake Air Temperature Sensor & Airflow Meter Signal
  • DTC 25, 26 - Lean Or Rich Air/Fuel Mixture
    • Probable Causes:
  • DTC 41 - Throttle Position Sensor
  • DTC 42 - Vehicle Speed Sensor Signal
    • Probable Causes:
  • DTC 43 - Starter Signal
  • DTC 51 - Switch Condition Signal
    • Probable Causes:
  • DTC 52 - Knock Sensor Signal
    • Probable Causes:
  • DTC 53 - Knock Sensor Control - ECM
    • Probable Cause:
  • DTC 71 - EGR System Malfunction
• Summary