Engine Controls - Tests W/Codes - 6-CYL

• Introduction
• Self-Diagnostic System
  • Hard Failures
  • Intermittent Failures
  • Retrieving Codes
  • Notes On Codes
  • Clearing Codes
  • Ecu Location
• Summary
• Self-Diagnostics
• Code Identification
• Diagnostic Code Charts
  • Notes
  • Ecu Terminal Identification
  • Diagnostic Circuit Check
  • Test No. 1 - Ecu (+B) Circuit
  • Code 12, 13 - Rpm Signal
  • Code 14/Test No. 2 - Ignition Signal
  • Code 21, 28/Test No. 3 - Oxygen Sensor Signal
  • Code 22/Test No. 4 - Coolant Temperature Sensor Signal
  • Code 24/Test No. 5 - Intake Air Temperature Sensor Signal
  • Code 25 - Lean Air/Fuel Mixture
    • Probable Causes:
  • Code 26 - Rich Air/Fuel Mixture
    • Probable Causes:
  • Code 31, 32/Test No. 6 - Airflow Meter Signal
  • Code 35 - High Altitude COMPENSATOR (HAC) Signal
    • Probable Causes:
  • Code 41/Test No. 7 - Throttle Position Sensor Signal
  • Code 42 - Vehicle Speed Sensor Signal
    • Probable Causes:
  • Code 43/Test No. 8 - Starter Signal
  • Code 51/Test No. 9 - Switch Signal
    • Probable Causes:
  • Code 71/Test No. 10 - EGR System Malfunction
  • Test No. 11 - Injector Circuit
  • Test No. 12 - Idle Speed Control Circuit
  • Test No. 13 - Check Engine Light Circuit