Tech Tips
Use the table below to help determine the cause of the problem symptom. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
| Symptom | Suspected Area | Link |
|---|---|---|
| Engine does not crank (does not start) | Starter (for 2.0 kW type) | Click here |
| Starter (for BOSCH Made) | ||
| Starter relay | ||
| Battery | ||
| VC output circuit | ||
| Difficult to start with cold engine | Engine difficult to start or stalling | Click here |
| Starter signal circuit | ||
| Pre-heating control circuit | Click here | |
| Injector assembly | ||
| Fuel filter assembly | ||
| Compression | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Diesel throttle body assembly | ||
| EDU (relay) | Click here | |
| Fuel with low cetane number used | - | |
| Fuel frozen | - | |
| Air mixed into fuel pipe | - | |
| Difficult to start with warm engine | Engine difficult to start or stalling | Click here |
| Starter signal circuit | ||
| Injector assembly | ||
| Fuel filter assembly | ||
| Compression | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Diesel throttle body assembly | ||
| EDU (relay) | Click here | |
| Air mixed into fuel pipe | - | |
| Battery deteriorated | - | |
| No initial combustion (does not start) | VC output circuit | Click here |
| Engine stalls soon after starting | Engine difficult to start or stalling | Click here |
| Fuel filter assembly | ||
| Injector assembly | ||
| ECM power source circuit | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Diesel throttle body assembly | ||
| Air mixed into fuel pipe | - | |
| Immobiliser system activated | ||
| Engine stalls (not including the condition listed above) | Engine difficult to start or stalling | Click here |
| Abnormal initial idling (poor idling) | Rough idling or excessive engine vibration | Click here |
| Fuel filter assembly | ||
| Injector assembly | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Mass air flow meter deteriorated | - | |
| Fuel with low cetane number used | - | |
| A/C signal circuit to ECM open and generator signal circuit open | - | |
| High engine idling speed | Rough idling or excessive engine vibration | Click here |
| A/C signal circuit | - | |
| Injector assembly | ||
| Starter signal circuit | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Speed sensor circuit open | Click here | |
| Accelerator pedal lod assembly | Click here | |
| Low engine idling speed (poor idling) | Rough idling or excessive engine vibration | Click here |
| A/C signal circuit | - | |
| Injector assembly | ||
| 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 engine vibration | Click here |
| 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 | Click here |
| Injector assembly | ||
| Fuel filter assembly | ||
| Compression | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Diesel throttle body assembly | ||
| Accelerator pedal lod assembly | Click here | |
| Turbocharger system | ||
| Mass air flow meter deteriorated | - | |
| Intake system blockage | - | |
| Exhaust system blockage | - | |
| Brake override system | ||
| Knocking (poor driveability) | Engine knocking or rattling | Click here |
| Turbocharger Noise | Click here | |
| Black smoke emitted (poor driveability) | Black smoke emitted | Click here |
| Injector assembly | ||
| Exhaust system blockage | - | |
| White smoke emitted (poor driveability) | Injector assembly | |
| Fuel filter assembly | ||
| ECM | ||
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Diesel throttle body assembly | ||
| Low quality fuel | - | |
| Turbocharger oil leak and white smoke | Click here | |
| Surging / Hunting (poor driveability) | Injector assembly | |
| ECM | ||
| Mass air flow meter deteriorated | - | |
| Fuel supply pump assembly | ||
| Fuel pressure sensor | ||
| Turbocharger system |