FUEL INJECTION AMOUNT LEARNING [SKYACTIV-D 1.5]

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Purpose of Adoption

• To reduce engine speed fluctuations, the fuel injection amount learning verifies the fuel injection amount of each cylinder by calculating fluctuations in engine speed during idling and corrects the fuel injection amount of each cylinder.

Service Point

• While fuel injection amount learning is being performed, the engine revs several times to verify the changes in the engine speed fluctuation.

• The fuel injection amount learning can be performed when the following conditions are met.

― Engine coolant temperature: 70 °C {158 °F} to 95 °C {203 °F}

― Intake air temperature: 0 °C {32 °F} to 65 °C {149 °F}

― Fuel temperature: 20 °C {68 °F} to 80 °C {176 °F}

• If fuel injection amount learning is not completed, the malfunction indicator light, glow indicator light and master warning light turn on. In addition, the PCM detects DTCs P1200:00 and P167B:00. (cleared by completing fuel injection amount learning)

• If only DTC P167B:00 is detected, the glow indicator light flashes.

Common Inquiry

• Not applicable

Other

• When the following are replaced, fuel injection amount learning must be performed.

― Injector

― PCM

― CKP sensor

― CKP sensor signal detection plate

― Lower cylinder block

― Crankshaft

― Mechanical