ECD SYSTEM > PROBLEM SYMPTOMS TABLE

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HINT:

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)	Starter	-
	ST relay	-
	ECT sensor	-
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	Click here
	Fuel filter	Click here
	Compression	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
	EDU (relay)	Click here
	Battery deteriorated	-
	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	Click here
	Fuel filter	Click here
	Compression	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
	EDU (relay)	Click here
	Air mixed into fuel pipe	-
	Battery deteriorated	-
Engine stalls soon after starting	Engine difficult to start or stalling	Click here
	Fuel filter	Click here
	Injector	Click here
	ECM power source circuit	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
	Air mixed into fuel pipe	-
	Immobilizer system activated	-
Engine stalling (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	Click here
	Injector	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Fuel with low cetane number used	-
	A/C's signal circuit to ECM open and generator's signal circuit to ECM open	-
	Low quality fuel	-
High engine idling speed (poor idling)	Rough idling or excessive engine vibration	Click here
	A/C signal circuit	-
	Injector	Click here
	Starter signal circuit	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Speed sensor circuit open	Click here
	Accelerator pedal	Click here
Low engine idling speed (poor idling)	Rough idling or excessive engine vibration	Click here
	A/C signal circuit	-
	Injector	Click here
	Compression	Click here
	Valve clearance	Click here
	Fuel line (air bleeding)	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
Rough idling (poor idling)	Rough idling or excessive engine vibration	Click here
Hunting with hot engine (poor idling)	Injector	Click here
	ECM power source circuit	Click here
	Compression	Click here
	Fuel line (air bleeding)	Click here
	Valve clearance	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
Hunting with cold engine (poor idling)	Injector	Click here
	ECM power source circuit	Click here
	Compression	Click here
	Fuel line (air bleeding)	Click here
	Valve clearance	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
Hesitation / Poor acceleration (poor driveability)	Lack of power or hesitation	Click here
	Injector	Click here
	Fuel filter	Click here
	Compression	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
	Accelerator pedal	Click here
	Turbocharger system	Click here
Knocking (poor driveability)	Engine knocking or rattling	Click here
Black smoke emitted (poor driveabilty)	Black smoke emitted	Click here
	Injector	Click here
	Accumulation in exhaust system	-
White smoke emitted (poor driveability)	Injector	Click here
	Fuel filter	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Diesel throttle body assembly	Click here
	Pre-heating control circuit	Click here
	Low quality fuel	-
Surging / Hunting (poor driveability)	Injector	Click here
	ECM	Click here
	Supply pump	Click here
	Fuel pressure sensor	Click here
	Turbocharger system (waste gate valve)	Click here