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 |
|