Engine Controls - Tests W/Codes

• Introduction
  • Notes
  • Terminology
• Self-Diagnostic System
  • Hard Failures
  • Intermittent Failures
  • Retrieving Codes
  • Clearing Codes
  • ECM Location
• Summary
• Trouble Code Definition
• Self-Diagnostic Trouble Code Charts
  • Chart A-1 - ECM Power & Ground CKT Check Mil "Check Engine" Inoperative, Engine Cranks But Does Not Start
  • Chart A-2 - Mil "Check Engine" CKT Check Mil "Check Engine" Inoperative, Engine Starts
  • Chart A-3 - Mil "Check Engine" CKT Check Mil "Check Engine" Stays On - Won't Flash
  • Code 13 - Heated Oxygen Sensor Circuit
  • Code 14 - ECT Sensor CKT Low Temp. Indicated, Voltage High
  • Code 15 - ECT Sensor CKT High Temp. Indicated, Voltage Low
  • Code 21 - TP Sensor Circuit Signal Voltage High
  • Code 22 - TP Sensor Circuit Signal Voltage Low
  • Code 23 - IAT Sensor CKT Low Temp. Indicated, Voltage High
  • Code 24 - Vehicle Speed Sensor Circuit
  • Code 25 - IAT Sensor CKT High Temp. Indicated, Voltage Low
  • Code 31 - Map Sensor Circuit Signal Voltage Low
  • Code 32 - Map Sensor Circuit Signal Voltage High
  • Code 41 - Ignition Fail Safe Signal CKT No Ignition Signal
  • Code 42 - CMP Sensor CKT No Signal For 2 Seconds During Engine Starting
  • Code 46 - Idle Speed Control (ISC) System ISC Out Of Range
  • Code 51 - EGR System Faulty EGR System
• Final Check
  • Preliminary Information
  • Road Test Procedures
    • Code 24
    • Except Code 24