Seintek S2800 - Injector Positive Negative Positive; Mixture Solenoid

10-15
10.2.3. Injector Positive Negative Positive
Measures and compares the signal from fuel injection systems that uses PNP type.
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Injector PNP
NJECTOR PNP
BLACK TO ENGINE
RED TO INJECTOR POSITIVE
CONNECTION
To engine (chassis)
To injector positive
Verify all injectors are similar.
Normal Injector PNP waveform
10.2.4. Mixture Solenoid
Measures and compares pulse-width-modulated signals that control fuel mixture solenoids.
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Mixture Solenoid
MIXTURE SOLENOID
BLACK TO ENGINE CHASSIS
RED TO SOLENOID
To engine (chassis)
To fuel mixture solenoid
Normally duty cycle should be
approximately 50%.
Normal Mixture Solenoid waveform