A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection
- Manufacturer Code Charts
- Related Tests, Information and Procedures
- A Charts
- Chart A-1 No Service Engine Soon Light
- Chart A-2 Won't Flash Code 12 Service Engine Light On
- Chart A-3 Engine Cranks But Will Not Run
- Chart A-3H Engine Cranks But Will Not Run
- Chart A-4 Injector Circuit Diagnosis
- Chart A-5 Fuel Pump Relay Circuit Diagnosis (One Fuel Tank)
- Chart A-5A Fuel Pump Relay Circuit Diagnosis (Two Fuel Tanks)
- Chart A-6 Fuel System Pressure Test
- C Charts
- Chart C-1A Park/Neutral Switch Diagnosis
- Chart C-1B Crank Signal Diagnosis
- Chart C-1D Manifold Absolute Pressure (MAP) Output Check
- Chart C-2 Idle Air Control (IAC) System Check
- Chart C-4B Ignition System Check (Sealed Module Conn. Dist.)
- Chart C-5 Electronic Spark Control (ESC) Check
- Chart C-6C Air Management Check (EAC) Valve
- Chart C-7 EGR System Check (Over 8500 GVW)
- Chart C-7 EGR System Check (Under 8500 GVW)
- Chart C-8 Transmission Converter Clutch (Under 8500 GVW)
- Chart C-8A THM 400 Transmission Downshift Control
- Chart C-8B Man. Trans. Shift Light Check (Below 8500 GVW)
- Chart C-9A ECM QDR Check Procedure
- Chart C-10A A/C ON Signal Diagnosis
- A Charts