EMISSION CONTROL SYSTEM PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed in the DTC check and the problem still can not be confirmed in the basic inspection, then proceed to this step and perform a troubleshooting according to the numbered order given in the table below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Does not crank (Difficult to start) | 1. Starter (for 2.2 kw) 1. Starter (for 2.7 kw) 2. Starter relay |
|
| No initial combustion (Difficult to start) | 1. ECU power source circuit 2. Pre-heating system 3. Compression 4. Emission ECU 5. Injection pump |
|
| Cold engine (Difficult to start) | 1. Pre-heating system 2. Starter signal circuit 3. Engine coolant temperature sensor 4. Injection nozzle 5. Fuel filter 6. Emission ECU 7. Injection pump |
|
| Hot engine (Difficult to start) | 1. Starter signal circuit 2. Injection nozzle 3. Fuel filter 4. Emission ECU 5. Injection pump |
|
| Soon after starting (Engine stall) | 1. Fuel filter 2. Emission ECU 3. Injection pump |
|
| Others (Engine stall) | 1. ECU power source circuit 2. Emission ECU 3. Injection pump |
|
| Incorrect first idle (Poor idling) | 1. Engine coolant temperature sensor 2. Fuel filter 3. Emission ECU 4. Injection pump |
|
| High engine idle speed (Poor idling) | 1. Throttle position sensor 2. Engine coolant temperature sensor 3. Vehicle speed sensor 4. Emission ECU 5. Injection pump |
|
| Lower engine idle speed (Poor idling) | 1. Injection nozzle 2. EGR system 3. Engine coolant temperature sensor 4. Vehicle speed sensor 5. Compression 6. Valve clearance 7. Fuel line (Air bleed) 8. Emission ECU 9. Injection pump |
|
| Rough idling (Poor idling) | 1. Injection nozzle 2. Fuel line (Air bleed) 3. Pre-heating system 4. EGR system 5. Throttle position sensor 6. Engine speed sensor 7. Compression 8. Valve clearance 9. Emission ECU 10.Injection pump |
|
| Hunting at hot engine (Poor idling) | 1. Injection nozzle 2. ECU power source circuit 3. Throttle position sensor 4. Compression 5. Fuel line (Air bleed) 6. Valve clearance 7. Emission ECU 8. Injection pump |
|
| Hunting at cold engine (Poor idling) | 1. Pre-heating system 2. Injection nozzle 3. ECU power source circuit 4. Engine speed sensor 5. Engine coolant temperature sensor 6. Compression 7. Fuel line (Air bleed) 8. Valve clearance 9. Emission ECU 10.Injection pump |
|
| Hesitation/ Poor acceleration (Poor driveability) | 1. Injection nozzle 2. Fuel filter 3. EGR system 4. Throttle position sensor 5. Engine speed sensor 6. Compression 7. Emission ECU 8. Injection pump |
|
| Knocking (Poor driveability) | 1. Injection nozzle 2. EGR system 3. Engine speed sensor 4. Engine coolant temperature sensor 5. Emission ECU |
|
| Black smoke (Poor driveability) | 1. Injection nozzle 2. EGR system 3. Throttle position sensor 4. Emission ECU 5. Injection pump |
|
| White smoke (Poor driveability) | 1. EGR system 2. Pre-heating system 3. Injection nozzle 4. Engine speed sensor 5. Fuel filter 6. Engine coolant temperature sensor 7. Emission ECU 8. Injection pump |
|
| Surging/ Hunting (Poor driveability) | 1. Injection nozzle 2. Throttle position sensor 3. Emission ECU 4. Injection pump |