Component Location
General Description

Based on information from various sensors, the ECM measures the fuel injection amount. The fuel injector is a solenoid-operated valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The ECM controls each injector by grounding the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit voltage should be low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening the control circuit, the fuel injector is closed and circuit voltage should momentarily peak.

DTC Description

Checking output signals from injectors. Under detecting condition, if an output signal is high, PCM sets P0277. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Signal High

● Poor connection

● Short to battery in harness

● Injector

● PCM

Enable Condition

● Engine running state

● 11V ≤ Battery voltage ≤ 16V

● Above conditions are met >0.5sec.

Threshold Value

● Short to battery

Diagnosis Time

● Continuous

MIL On Condition

● 2 driving cycles

Specification

Item

Coil resistance(Ω)

Injector

13.8 ~ 15.2Ω( at 20°C/ 68°F)

Schematic Diagram
note
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Signal Waveform
Яндекс.Метрика