| Symptom | Suspected Area | See page |
| Engine does not crank (does not start) |
Battery |
|
| Starter |
|
| Starter relay |
|
| Entry and start system |
|
| Difficult to start with cold engine |
Engine difficult to start or stalling |
|
| Cranking holding function circuit |
|
| Pre-heating control circuit |
|
| Injector assembly |
|
| Fuel filter |
|
| Compression |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| EDU relay |
|
| Fuel with low cetane number used |
- |
| Fuel frozen |
- |
| Air mixed into fuel pipe |
- |
| No initial combustion (does not start) | VC output circuit |
|
| Difficult to start with hot engine |
Engine difficult to start or stalling |
|
| Cranking holding function circuit |
|
| Injector assembly |
|
| Fuel filter |
|
| Compression |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| EDU relay |
|
| Air mixed into fuel pipe |
- |
| Battery deteriorated |
- |
| Engine stalls soon after starting | Engine immobiliser system |
|
| Engine difficult to start or stalling |
|
| Injector assembly |
|
| Fuel filter |
|
| ECM power source circuit |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| Air mixed into fuel pipe |
- |
| Engine stalls (not including the conditions listed above) |
Engine difficult to start or stalling |
|
| Abnormal initial idling (poor idling) |
Rough idling or excessive engine vibration |
|
| Injector assembly |
|
| Fuel filter |
|
| Compression |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Mass air flow meter deteriorated |
- |
| Fuel with low cetane number used |
- |
| A/C signal circuit and/or generator signal circuit open |
- |
| High engine idling speed |
Rough idling or excessive engine vibration |
|
| A/C signal circuit |
- |
| Injector assembly |
|
| Cranking holding function circuit |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Speed sensor circuit open |
|
| Accelerator pedal |
|
| Deviation in engine coolant temperature sensor characteristics |
|
| Low engine idling speed (poor idling) |
Rough idling or excessive engine vibration |
|
| A/C signal circuit |
- |
| Injector assembly |
|
| EGR system |
|
| Compression |
|
| Fuel line (air bleeding) |
- |
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| Mass air flow meter deteriorated |
- |
| Rough idling (poor idling) |
Rough idling or excessive vibration |
|
| Hunting with hot engine (poor idling) |
Injector assembly |
|
| ECM power source circuit |
|
| Compression |
|
| Fuel line (air bleeding) |
- |
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| Hunting with cold engine (poor idling) |
Injector assembly |
|
| ECM power source circuit |
|
| Compression |
|
| Fuel line (air bleeding) |
- |
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| Fuel with low cetane number used |
- |
| Hesitation/poor acceleration (poor driveability) |
Lack of power or hesitation |
|
| Injector assembly |
|
| Fuel filter |
|
| EGR system |
|
| Compression |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| Accelerator pedal |
|
| Turbocharger system |
|
| Mass air flow meter deteriorated |
- |
| Intake system blockage |
- |
| Exhaust system blockage |
- |
| Brake override system |
|
| ECT oil pressure rises slowly | - |
| Knocking (poor driveability) |
Engine knocking or rattling |
|
| Turbocharger Noise |
|
| Black smoke emitted (poor driveability) |
Black smoke emitted |
|
| EGR system |
|
| Injector assembly |
|
| Exhaust system blockage |
- |
| DPF catalyst damaged | - |
| White smoke emitted (poor driveability) |
EGR system |
|
| Injector assembly |
|
| Fuel filter |
|
| ECM |
|
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Diesel throttle body assembly |
|
| Low quality fuel |
- |
| White smoke emitted |
|
| Turbocharger oil leak and white smoke |
|
| Oil leak into combustion chamber from between piston and cylinder or from intake or exhaust valve | - |
| Using fuel containing large amount of sulfur | - |
| Surging/hunting (poor driveability) |
Injector assembly |
|
| ECM |
|
| Mass air flow meter deteriorated |
- |
| Fuel supply pump assembly |
|
| Fuel pressure sensor |
|
| Turbocharger system |
|
| Fuel with low cetane number used | - |