ECD SYSTEM PROBLEM SYMPTOMS TABLE
Use the table below to help determine the cause of the problem symptom. 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 | See page |
|---|---|---|
| Engine does not crank (does not start) | Battery | |
| Starter signal circuit | ||
| Starter assembly | ||
| Starter relay | ||
| Engine does not start (cranks normally) | VC output circuit | |
| Crankshaft position sensor | ||
| ECM | ||
| Difficult to start with cold engine | Engine difficult to start or stalling | |
| Starter signal circuit | ||
| Pre-heating control circuit (w/ glow plug assembly) | ||
| Injector assembly | ||
| Fuel filter | ||
| Compression | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| EDU relay | ||
| Battery deteriorated | ||
| Fuel with low cetane number used | - | |
| Fuel frozen | - | |
| Air mixed into fuel pipe | - | |
| ECM | ||
| Difficult to start with warm engine | Engine difficult to start or stalling | |
| Starter signal circuit | ||
| Injector assembly | ||
| Fuel filter | ||
| Compression | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| EDU relay | ||
| Air mixed into fuel pipe | - | |
| Battery deteriorated | ||
| ECM | ||
| Engine stalls soon after starting | Engine difficult to start or stalling | |
| Fuel filter | ||
| Injector assembly | ||
| ECM power source circuit | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| Air mixed into fuel pipe | - | |
| ECM | ||
| Engine stalls (not including the condition listed above) | Engine difficult to start or stalling | |
| Abnormal initial idling (poor idling) | Rough idling or excessive engine vibration | |
| Fuel filter | ||
| Injector assembly | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Mass air flow meter sub-assembly deteriorated | ||
| Fuel with low cetane number used | - | |
| Air conditioning signal circuit to ECM open and generator signal circuit to ECM open | ||
| ECM | ||
| High engine idling speed (poor idling) | Rough idling or excessive engine vibration | |
| Air conditioning signal circuit | ||
| Injector assembly | ||
| Starter signal circuit | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Speed sensor circuit open | ||
| Accelerator link assembly (accelerator pedal position sensor) | ||
| ECM | ||
| Low engine idling speed (poor idling) | Rough idling or excessive engine vibration | |
| Air conditioning signal circuit | ||
| Injector assembly | ||
| EGR system | ||
| Compression | ||
| Fuel line (air bleeding) | - | |
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| ECM | ||
| Rough idling (poor idling) | Rough idling or excessive engine vibration | |
| Hunting with hot engine (poor idling) | Injector assembly | |
| ECM power source circuit | ||
| Compression | ||
| Fuel line (air bleeding) | - | |
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| ECM | ||
| Hunting with cold engine (poor idling) | Injector assembly | |
| ECM power source circuit | ||
| Compression | ||
| Fuel line (air bleeding) | - | |
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| ECM | ||
| Hesitation/Poor acceleration (poor driveability) | Lack of power or hesitation | |
| Injector assembly | ||
| Fuel filter | ||
| EGR system | ||
| Compression | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| Accelerator link assembly (accelerator pedal position sensor) | ||
| Turbocharger system | ||
| Mass air flow meter sub-assembly deteriorated | ||
| Intake system blockage | - | |
| Exhaust system blockage | - | |
| ECM | ||
| Knocking (poor driveability) | Engine knocking or rattling | |
| Black smoke emitted (poor driveability) | Black smoke emitted | |
| EGR system | ||
| Injector assembly | ||
| Accumulation in exhaust system | - | |
| Exhaust system blockage | - | |
| Center exhaust pipe assembly (DPF catalyst) damaged | ||
| White smoke emitted (poor driveability) | EGR system | |
| Injector assembly | ||
| Fuel filter | ||
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Diesel throttle body assembly | ||
| Pre-heating control circuit (w/ glow plug assembly) | ||
| Low quality fuel | - | |
| ECM | ||
| Surging/Hunting (poor driveability) | Injector assembly | |
| Injection or supply pump assembly | ||
| Common rail assembly (fuel pressure sensor) | ||
| Turbocharger system | ||
| ECM | ||
| DPF switch indicator does not come on while the DPF warning buzzer is sounding | DPF switch and buzzer circuit | |
| ECM | ||
| DPF forcible regeneration does not end | DPF switch and buzzer circuit | |
| Clogging by center exhaust pipe assembly (catalyst converter) | ||
| ECM |