ECD SYSTEM PROBLEM SYMPTOMS TABLE

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.

ECD System
Symptom Suspected Area Link
Engine does not crank (does not start) Starter (for 2.0 kW type) Click here
Starter (for 2.2 kW type)

Click here

Starter relay Click here
Battery

Click here

VC output circuit

Click here

Difficult to start with cold engine Engine difficult to start or stalling Click here
Starter signal circuit

Click here

Pre-heating control circuit Click here
Injector assembly Click here
Fuel filter assembly

Click here

Compression Click here
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

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

Click here

Injector assembly Click here
Fuel filter assembly

Click here

Compression Click here
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

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

Click here

Injector assembly Click here
ECM power source circuit

Click here

ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

Air mixed into fuel pipe -
Immobiliser system activated

Click here

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

Click here

Injector assembly Click here
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

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 Click here
Starter signal circuit

Click here

ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

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 Click here
Compression Click here
Fuel line (air bleeding) -
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

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 Click here
ECM power source circuit

Click here

Compression Click here
Fuel line (air bleeding) -
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

Hunting with cold engine (poor idling) Injector assembly Click here
ECM power source circuit

Click here

Compression Click here
Fuel line (air bleeding) -
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

Fuel with low cetane number used -
Hesitation / Poor acceleration (poor driveability) Lack of power or hesitation Click here
Injector assembly Click here
Fuel filter assembly

Click here

Compression Click here
ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

Accelerator pedal lod assembly Click here
Turbocharger system

Click here

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 Click here
Exhaust system blockage -
White smoke emitted (poor driveability) Injector assembly Click here
Fuel filter assembly

Click here

ECM

Click here

Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Diesel throttle body assembly

Click here

Low quality fuel -
Turbocharger oil leak and white smoke Click here
Surging / Hunting (poor driveability) Injector assembly Click here
ECM

Click here

Mass air flow meter deteriorated -
Fuel supply pump assembly

Click here

Fuel pressure sensor

Click here

Turbocharger system

Click here