Engine Controls - Tests W/Codes

• Introduction
• Self-Diagnostic System
  • Notes
  • Hard Failures
  • Intermittent Failures
  • Malfunction History & Information Flags
  • Diagnostic Procedure
  • Retrieving Codes (Non-Scan)
  • Reading Trouble Codes
  • Trouble Code Definition
  • Hard Or Intermittent Trouble Code Determination
  • Clearing Trouble Codes
  • Information Flags
    • Notes
    • Flag 16: Electrical Variable Orifice (EVO) Fault
    • Flag 27: Quick Quad-Driver Output Fault
    • Flag 48: Reference Input Intermittent Or Noisy
    • Flag 52: Battery Voltage Out Of Range
    • Flag 53: ESC (Knock Present)
    • Flag 54: 5-Volt Reference Ground
    • Flag 58: Battery Voltage Unstable
    • Flag 63: Option Check Sum Error
    • Flag 71: Cooling System High Temperature
    • Flag 72: Cooling System Low Temperature
    • Flag 73: Coolant Sensor Signal Unstable
    • Flag 74: Coolant/Transmission Temperature Sensor Ratio Error
    • Flag 75: Air Temperature Sensor Signal Unstable
    • Of Range
    • Flag 83: LOW Coolant
    • Flag 84: PCM Internal Communications Failure
  • Pcm Location
  • Diagnostic Materials
    • Diagnostic Aids
    • Field Service Mode Check (If Available)
  • Special Tools (Diagnostic)
  • Scan Tester Usage
  • Scan Data
• ECM/Pcm Code Charts
  • Notes
  • Code 13: Open/Not Ready Oxygen Sensor Circuit
    • Notes
    • Diagnostic Aids
  • Code 14: Coolant Temp Sensor Signal Voltage High
    • Notes
    • Diagnostic Aids
  • Code 15: Coolant Temp Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 17: Pcm Fault (Pull-Up Resistor)
  • Code 19: 6X Signal Fault
    • Notes
    • Diagnostic Aids
  • Code 21: Throttle Position Sensor Signal VLTGE High
    • Notes
    • Diagnostic Aids
  • Code 22: Throttle Position Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 23: IAT Sensor Circuit (Low Temp Indicated)
    • Notes
    • Diagnostic Aids
  • Code 24: Vehicle Speed Sensor
    • Notes
    • Diagnostic Aids
  • Code 25: IAT Sensor Circuit (High Temp Indicated)
    • Notes
    • Diagnostic Aids
  • Code 26: Quad-Driver Error
    • Notes
    • Diagnostic Aids
  • Code 32: EGR System Error
    • Notes
    • Diagnostic Aids
  • Code 33: Map Sensor Signal Voltage High
    • Notes
    • Diagnostic Aids
  • Code 34: Map Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 35: IAC Idle Speed Error
    • Notes
    • Diagnostic Aids
  • Code 41: Est Circuit Open Or Shorted
    • Notes
    • Diagnostic Aids
  • Codes 41 & 42 Simultaneous: By-Pass Open Or Grounded
    • Diagnostic Aids
  • Code 42: By-Pass Open Or Shorted
    • Notes
    • Diagnostic Aids
  • Code 43: ESC Open Or Shorted
    • Diagnostic Aids
  • Code 44: Lean Exhaust Indication
    • Notes
    • Diagnostic Aids
  • Code 45: Rich Exhaust Indication
    • Notes
    • Diagnostic Aids
  • Code 49: Idle Rpm High (Vacuum Leak)
    • Notes
    • Diagnostic Aids
  • Code 52: Faulty Cal-PAK
  • Code 55: Pcm Error
  • Code 81: Abs Message Fault
    • Notes
    • Diagnostic Aids
  • Code 82: Internal Pcm Communication Fault
• Summary
• Wiring Diagrams