Automotive Scan Tool - Basic Level

A good short term fuel trim (STFT) numbers fluctuates between ........

• -5% to 5%

• -12% to 10%

• -5% to 9%

• -10% to 10%

Zirconia O2 sensor ..............

• Output voltage is reversed

• Varies a reference voltage by PCM

• Creates its own voltage

• Always a heated type sensor

Indicate the three wire 02 sensor.

• Signal, ground & heater (-)

• Signal, ground & heater (+)

• Signal, heater (+) & heater (-)

• Heater (+), heater (-) & ground

A Wide Open Throttle Test is to check ............

• Fuel Pump Performance

• Injector Performance

• Engine Performance

• O2 Sensor Performance

Vacuum leak causes the 02 sensor to read .................

• 0 volts

• 0.2 to 0.8 volts

• 0.4 volts

• 0.1 to 1 volts

A short to ground on 02 signal wire will cause the reading at ..........

• 0.00 volts

• 0.9 volts

• 0.2 volts to 0.8 volts

• 0.3 volts to 0.6 volts

The fuel pump relay is turned on through pin ..........

• 30

• 85

• 86

• 87

The DMM symbol shown in the picture is categorized as ........

• ACV

• DCV

• Ohms

• Amps

What is the name of this component?

• Oxygen sensor

• Fuel pump

• Purge Control Solenoid

• Charcoal Canister

A vacuum leak can be caused by a faulty ...........

• Intake manifold gasket

• Injector 'O' ring

• PCV valve

• All of the above