ECD SYSTEM PROBLEM SYMPTOMS TABLE
When the malfunction is not confirmed in the DTC (Diagnostic Trouble Code) check and the problem still cannot be confirmed in the basic inspection, use this table and troubleshoot according to the priority order given below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (Does not start) | Starter assembly (for 2.2 kW Type) | |
| Starter assembly (for 2.7 kW Type) | ||
| Starter relay (for 2.2 kW Type) | ||
| Starter relay (for 2.7 kW Type) | ||
| Starter signal circuit | ||
| Battery | - | |
| No initial combustion (Does not start) | ECM power source circuit | |
| Pre-heating control circuit | ||
| Compression | ||
| ECM | ||
| Injection or supply pump assembly | ||
| VC Output Circuit | ||
| Cold engine (Difficult to start) | Pre-heating control circuit | |
| Starter signal circuit | ||
| Engine coolant temperature sensor | ||
| Nozzle holder and nozzle set | ||
| Fuel filter element sub-assembly | ||
| Venturi assembly | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Hot engine (Difficult to start) | Starter signal circuit | |
| Nozzle holder and nozzle set | ||
| Fuel filter element sub-assembly | ||
| Venturi assembly | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Engine stall (Soon after starting) | Fuel filter element sub-assembly | |
| Venturi assembly | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Engine stall (Other) | ECM power source circuit | |
| Venturi assembly | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Incorrect first idle (Poor idling) | Engine coolant temperature sensor | |
| Fuel filter element sub-assembly | ||
| ECM | ||
| Injection or supply pump assembly | ||
| High engine idle speed (Poor idling) | Air conditioning signal circuit | |
| Engine coolant temperature sensor | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Low engine idle speed (Poor idling) | Air conditioning signal circuit | |
| Nozzle holder and nozzle set | ||
| Engine coolant temperature sensor | ||
| Venturi assembly | ||
| Compression | ||
| Valve clearance | ||
| Fuel line (Air bleed) | - | |
| ECM | ||
| Injection or supply pump assembly | ||
| Rough idling (Poor idling) | Nozzle holder and nozzle set | |
| Fuel line (Air bleed) | - | |
| Pre-heating control circuit | ||
| Venturi assembly | ||
| Compression | ||
| Valve clearance | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Hunting at hot engine (Poor idling) | Nozzle holder and nozzle set | |
| ECM power source circuit | ||
| Compression | ||
| Fuel line (Air bleed) | - | |
| Valve clearance | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Hunting at cold engine (Poor idling) | Pre-heating control circuit | |
| Nozzle holder and nozzle set | ||
| ECM power source circuit | ||
| Engine coolant temperature sensor | ||
| Compression | ||
| Fuel line (Air bleed) | - | |
| Valve clearance | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Hesitation/Poor acceleration (Poor driveability) | Nozzle holder and nozzle set | |
| Fuel filter element sub-assembly | ||
| Compression | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Brake override system | ||
| Knocking (Poor driveability) | Nozzle holder and nozzle set | |
| Engine coolant temperature sensor | ||
| ECM | ||
| Black smoke (Poor driveability) | Nozzle holder and nozzle set | |
| Venturi assembly | ||
| Intake air temperature sensor | ||
| ECM | ||
| Injection or supply pump assembly | ||
| White smoke (Poor driveability) | Pre-heating control circuit | |
| Nozzle holder and nozzle set | ||
| Fuel filter element sub-assembly | ||
| Venturi assembly | ||
| Engine coolant temperature sensor | ||
| Intake air temperature sensor | ||
| ECM | ||
| Injection or supply pump assembly | ||
| Surging/Hunting (Poor driveability) | Nozzle holder and nozzle set | |
| ECM | ||
| Injection or supply pump assembly |