Engine Controls - Tests W/Codes

• Introduction
• Self-Diagnostic System
  • Malfunction Indicator Light (Mil)
    • Notes
    • Hard Failures
    • Intermittent Failures
  • Diagnostic Procedure
    • Notes
    • Diagnosis of computerized engine control system should be performed in following order:
  • Service Precautions
  • Retrieving Codes (Non-Scan)
  • Retrieving Codes (Scan Tester)
  • Clearing Codes
  • ECM Location
  • ECM Power & Ground Circuits
  • Fault Codes
• Diagnostic Tests
  • Notes
  • Code 11 & 59 - Heated Oxygen Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Excel
    • Heated Oxygen Sensor Inspection (Except Excel Federal)
  • Code 12 - Airflow Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Airflow Sensor Inspection
  • Code 13 - Intake Air Temperature Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Intake Air Temperature Sensor Inspection
  • Code 14 - Throttle Position Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Throttle Position Sensor Inspection
  • Code 15 - Idle Speed Control Motor Position Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Idle Speed Control Motor Position Sensor Inspection
  • Code 21 - Coolant Temperature Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Coolant Temperature Sensor Inspection
  • Code 22 - Crankshaft Position Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • CKP Sensor Inspection
  • Code 23 - Top Dead Center Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
  • Code 24 - Vehicle Speed Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Vehicle Speed Sensor Inspection
  • Code 25 - Barometric Pressure Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Barometric Pressure Sensor Inspection
  • Code 41 - Fuel Injector Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • Fuel Injector Inspection
  • Code 42 - Fuel Pump Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
  • Code 43 - EGR Temperature Sensor Failure
    • Notes
    • System Inspection
    • Scan Tester Procedure
    • Harness Inspection
    • EGR Temperature Sensor Inspection
  • Code 44 - Ignition Coil/Power Transistor Failure
    • Notes
    • Scan Tester Procedure
    • Harness Inspection
    • Ignition Coil and Power Transistor Inspection
• Summary