| Symptom | Suspected Area | See page |
| Engine does not crank (does not start) |
Starter |
|
| Starter relay |
|
| Starter signal circuit |
|
| No initial combustion (does not start) |
ECM power source circuit |
|
| Pre-heating control circuit |
|
| Compression |
|
| ECM |
|
| Fuel injection pump |
|
| Difficult to start (cold engine) |
Pre-heating control circuit |
|
| Starter signal circuit |
|
| Engine coolant temperature sensor |
|
| Fuel injection nozzle |
|
| Fuel filter element assembly (level warning switch) |
|
| Diesel throttle body |
|
| ECM |
|
| Fuel injection pump |
|
| Difficult to start (hot engine) |
Starter signal circuit |
|
| Fuel injection nozzle |
|
| Fuel filter element assembly (level warning switch) |
|
| Diesel throttle body |
|
| ECM |
|
| Fuel injection pump |
|
| Engine stall (soon after starting) |
Fuel filter element assembly (level warning switch) |
|
| Diesel throttle body |
|
| ECM |
|
| Fuel injection pump |
|
| Engine stall (other) |
ECM power source circuit |
|
| Diesel throttle body |
|
| ECM |
|
| Fuel injection pump |
|
| Incorrect first idle (poor idling) |
Engine coolant temperature sensor |
|
| Fuel filter element assembly (level warning switch) |
|
| ECM |
|
| Fuel injection pump |
|
| High engine idle speed (poor idling) |
Air conditioning signal circuit |
|
| Engine coolant temperature sensor |
|
| ECM |
|
| Fuel injection pump |
|
| Low engine idle speed (poor idling) |
Air conditioning signal circuit |
|
| Fuel injection nozzle |
|
| Engine coolant temperature sensor |
|
| Diesel throttle body |
|
| Compression |
|
| Valve clearance |
|
| Fuel line (air bleed) |
|
| ECM |
|
| Fuel injection pump |
|
| Rough idling (poor idling) |
Fuel injection nozzle |
|
| Fuel line (air bleed) |
|
| Pre-heating control circuit |
|
| Diesel throttle body |
|
| Compression |
|
| Valve clearance |
|
| ECM |
|
| Fuel injection pump |
|
| Hunting when engine is hot (poor idling) |
Fuel injection nozzle |
|
| ECM power source circuit |
|
| Compression |
|
| Fuel line (air bleed) |
|
| Valve clearance |
|
| ECM |
|
| Fuel injection pump |
|
| Hunting when engine is cold (poor idling) |
Pre-heating control circuit |
|
| Fuel injection nozzle |
|
| ECM power source circuit |
|
| Engine coolant temperature sensor |
|
| Compression |
|
| Fuel line (air bleed) |
|
| Valve clearance |
|
| ECM |
|
| Fuel injection pump |
|
| Hesitation/Poor acceleration (poor driveability) |
Fuel injection nozzle |
|
| Fuel filter element assembly (level warning switch) |
|
| Compression |
|
| ECM |
|
| Fuel injection pump |
|
| Knocking (poor driveability) |
Fuel injection nozzle |
|
| Engine coolant temperature sensor |
|
| ECM |
|
| Black smoke (poor driveability) |
Fuel injection nozzle |
|
| Diesel throttle body |
|
| Intake air temperature sensor |
|
| ECM |
|
| Fuel injection pump |
|
| White smoke (poor driveability) |
Pre-heating control circuit |
|
| Fuel injection nozzle |
|
| Fuel filter element assembly (level warning switch) |
|
| Diesel throttle body |
|
| Engine coolant temperature sensor |
|
| Intake air temperature sensor |
|
| ECM |
|
| Fuel injection pump |
|
| Surging/Hunting (poor driveability) |
Fuel injection nozzle |
|
| ECM |
|
| Fuel injection pump |
|