How well do you know Diagnostic Insights? Take this quick quiz and see!
A relative compression test with an amp probe measures: Actual PSI values Current draw variations between cylinders Valve timing directly Leak down percentage Voltage drops occur faster than amperage drops in a coil circuit with a loose connection. True False Technician A says solenoids always produce an inductive signature when operating. Technician B says that inductors without a movable core, such as ignition coils, do not. Have an inductive signature. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B What is the expected resistance across CAN bus lines at the DLC (if directly connected)? 0 ohms 60 ohms 120 ohms Infinite A waveform showing voltage applied but no current flow usually indicates a shorted coil. True False Inductive circuits reach maximum current instantly when energized. True False Technician A says a fuel pump that maintains pressure at idle may still fail under load. Technician B says fuel volume must be tested in addition to pressure. Technician A only Technician B only Both Technician A and B Neither Technician A nor B What does Non-Return to Zero (NRZ) coding describe? EVAP valve default position Fuel pressure regulator design CAN data encoding Short-term fuel trim (STFT) is an adaptive correction stored in KAM. True False A missing inductive signature in an oil control solenoid waveform most likely means: Open winding Plunger did not move Excessive voltage High fuel pressure
