DFI ECM Tests W/Codes

• Diagnosis & Testing
  • Introduction
  • Diagnostic Tools
  • Diagnostic Procedure
  • Retrieving Stored Trouble Codes
    • Notes
    • Entering Diagnostic (Service) Mode
    • Status Light Display
    • "Off" Button
    • "Auto" Button
    • "Econ" Button
    • "°C"
    • "°F"
    • "°E"
    • "Front Defog"
    • "Rear Defog"
    • "Lo Fan"
    • "Norm Fan"
    • "Hi Fan"
    • Exiting Diagnostic Mode
    • Clearing Trouble Codes
  • Intermittent Failure Test Procedures
    • Procedures
    • Engine Data Display Procedure
    • Output Cycling Tests Procedure
    • Input Display Procedure
    • Fixed Spark Mode Procedure
  • Performance Flow Charts
  • ECM Trouble Code/Component Identification
  • DFI System Check
  • Chart A1 - No "Service Now/Soon" Light
  • Chart A1 - Code B334, No "Service Now/Soon" Light (Cont.)
  • Chart A2 - "Service Now/Soon" On (No Codes Present)
  • Chart A3 - No Start Or Stall After Start
  • Chart A4 - Fuel System Diagnosis
  • Chart A5 - Injector System Diagnosis
  • Chart A5 (Cont.) - Injector Circuit Tests
  • Chart A6 - Open Loop Diagnosis (O2 Sensor Not Ready)
  • Chart A7 - Lean Exhaust Signal
  • Chart A8 - Rich Exhaust Signal
  • Chart A9 - Oxygen (O2) Sensor Diagnosis
  • Self-Diagnostic System Check
  • Chart B1 - Inoperative Odometer
  • Chart B2 - Inoperative Odometer (Cont.)
  • Chart B3 - Inoperative Odometer (Cont.)
  • Chart B4 - Inoperative Odometer (Cont.)
  • Chart B5 - Inoperative Odometer (Cont.)
  • Chart B6 - Inoperative Odometer (Cont.)
  • Chart B7 - Inoperative Odometer (Cont.)
  • Chart B8 - Inoperative Odometer (Cont.)
  • Chart C1 - CCDIC Problem
  • CHART C2 - CCDIC Problem (Cont.)
  • Chart C3 - CCDIC Problem (Cont.)
  • Chart C4 - CCDIC Problem (Cont.)
  • Chart A - Multiple Trouble Codes (Stored Hard)
  • Hard Code E012 - No Distributor (Tach) Signal
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard/Intermittent Code E013 - O2 Sensor Not Ready
    • Notes
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code E014 - Shorted Coolant Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code E015 - Open Coolant Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO16 - Generator Voltage Out Of Range
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO18 - Open Crank Signal Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO19 - Shorted Fuel Pump Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard/Intermittent Code EO20 - Open Fuel Pump CKT
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard/Intermittent Code EO20 (Cont.) - Fuel Fuse Blown
    • Notes
    • Notes On Intermittents
  • Hard Code E021 - Shorted Throttle Position Sensor CKT
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code E022 - Open Throttle Position Sensor CKT
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code E023 - Est Circuit Problem
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
  • Hard Code E024 - Speed Sensor Circuit Problem
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO26 - Shorted Throttle Switch CKT
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO27 - Open Throttle Switch Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO28 - Open 3RD Or 4TH Gear Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO28 (Cont.) - Open 3RD/4TH Gear CKT (4TH W/O 3RD)
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard/Intermittent Code EO30 - Idle Speed Control CKT
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO31 - Shorted Map Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO32 - Open Map Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO34 - Map Signal Too High
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO37 - Shorted Mat Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO38 - Open Mat Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard/Intermittent Code EO39 - VCC Engagement Problem
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO40 - Open Power Steering Pressure CKT
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Or Intermittent Code EO44 - Lean Exhaust Signal
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard/Intermittent Code EO45 - Rich Exhaust Signal
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Code EO47 - BCM To ECM Data
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
  • Code EO48 - EGR System Fault
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Code EO51 - Prom Error
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Code EO52 - ECM Memory Reset
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
  • Trouble Code EO53 - Distributor Signal Interrupt
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Hard Code EO55 - TPS Out Of Adjustment
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
    • ISC Plunger Retract Procedure
    • ISC Plunger Extension Procedure
  • Hard Code EO59 - VCC Temperature Sensor Circuit
    • Test Conditions:
    • Failure Conditions:
    • Action Taken:
    • Diagnostic Aids:
    • Notes On Intermittents
  • Code EI71 - Cruise Control/VCC Brake Circuit
    • Notes
    • Notes On Intermittents
  • Code EI72 - Throttle Switch Circuit
    • Notes
    • Notes On Intermittents
  • Code EI74 - Park/Neutral (NSBU) Switch Circuit
    • Notes
    • Notes On Intermittents
  • Code EI78 - Power Steering Pressure Circuit
    • Notes
    • Notes On Intermittents
  • Performance Charts
  • Performance Chart 1 - ECM Replacement Check
  • Performance Chart 3 - Canister Purge Control Diagnosis
  • Performance Chart 4 - Est System Check
  • Performance Chart 6 - Air Management Diagnosis
  • Performance Chart 7 - EGR Diagnosis
  • Performance Chart 8 - VCC Electrical Diagnosis
  • Performance Chart 9 - EFE Diagnosis
• Wiring Diagrams