ECD SYSTEM PROBLEM SYMPTOMS TABLE

When the malfunction code is not confirmed in the diagnostic trouble code check and the problem still can not be confirmed in the basic inspection, proceed to this problem symptoms tables and troubleshoot according to the numbered order given below.

Symptom Suspected Area See page
Does not crank (Difficult to start)

  1. Starter

  2. Starter relay

  3. Water temp. sensor

Click here

Click here

Click here

Cold engine (Difficult to start)

  1. STA signal circuit

  2. Injector

  3. Fuel filter

  4. Compression

  5. ECM

  6. Suction control valve

  7. Fuel pressure sensor

  8. Diesel throttle

  9. Glow plug system

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Hot engine (Difficult to start)

  1. STA signal circuit

  2. Injector

  3. Fuel filter

  4. Compression

  5. ECM

  6. Suction control valve

  7. Fuel pressure sensor

  8. Diesel throttle

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Soon after starting (Engine stall)

  1. Fuel filter

  2. Injector

  3. ECU power source circuit

  4. ECM

  5. Suction control valve

  6. Fuel pressure sensor

  7. Diesel throttle

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Others (Engine stall)

  1. ECU power source circuit

  2. Injector

  3. ECM

  4. Suction control valve

  5. Fuel pressure sensor

  6. Diesel throttle

Click here

Click here

Click here

Click here

Click here

Click here

Incorrect first idle (Poor idling)

  1. Fuel filter

  2. Injector

  3. ECM

  4. Suction control valve

  5. Fuel pressure sensor

Click here

Click here

Click here

Click here

Click here

High engine idle speed (Poor idling)

  1. Injector

  2. STA signal circuit

  3. ECM

  4. Suction control valve

  5. Fuel pressure sensor

Click here

Click here

Click here

Click here

Click here

Lower engine idle speed (Poor idling)

  1. Injector

  2. EGR control circuit

  3. Compression

  4. Valve clearance

  5. Fuel line (Air bleed)

  6. ECM

  7. Suction control valve

  8. Fuel pressure sensor

  9. Diesel throttle

Click here

Click here

Click here

Click here

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Click here

Click here

Click here

Click here

Rough idling (Poor idling)

  1. Injector

  2. Fuel line (Air bleed)

  3. EGR control circuit

  4. Compression

  5. Valve clearance

  6. ECM

  7. Suction control valve

  8. Fuel pressure sensor

  9. Diesel throttle

Click here

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Click here

Click here

Click here

Click here

Click here

Click here

Click here

Hunting at hot engine (Poor idling)

  1. Injector

  2. ECU power source circuit

  3. Compression

  4. Fuel line (Air bleed)

  5. Valve clearance

  6. ECM

  7. Suction control valve

  8. Fuel pressure sensor

  9. Diesel throttle

Click here

Click here

Click here

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Click here

Click here

Click here

Click here

Click here

Hunting at cold engine (Poor idling)

  1. Injector

  2. ECU power source circuit

  3. Compression

  4. Fuel line (Air bleed)

  5. Valve clearance

  6. ECM

  7. Suction control valve

  8. Fuel pressure sensor

  9. Diesel throttle

Click here

Click here

Click here

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Click here

Click here

Click here

Click here

Click here

Hesitation/ Poor acceleration (Poor driveability)

  1. Injector

  2. Fuel filter

  3. EGR control circuit

  4. Compression

  5. ECM

  6. Suction control valve

  7. Fuel pressure sensor

  8. Diesel throttle

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Knocking (Poor driveability)

  1. Injector

  2. EGR control circuit

  3. ECM

  4. Suction control valve

  5. Fuel pressure sensor

Click here

Click here

Click here

Click here

Click here

Black smoke (Poor driveability)

  1. Injector

  2. EGR control circuit

  3. ECM

  4. Suction control valve

  5. Fuel pressure sensor

  6. Diesel throttle

Click here

Click here

Click here

Click here

Click here

Click here

White smoke (Poor driveability)

  1. EGR control circuit

  2. Injector

  3. Fuel filter

  4. ECM

  5. Suction control valve

  6. Fuel pressure sensor

  7. Diesel throttle

Click here

Click here

Click here

Click here

Click here

Click here

Click here

Surging/ Hunting (Poor driveability)

  1. Injector

  2. ECM

  3. Suction control valve

  4. Fuel pressure sensor

Click here

Click here

Click here

Click here