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10.1.5.
IAT Sensor
Measures and compares the signal from air temperature sensors.
Path:
IAT SENSOR
BLACK TO SENSOR BODY OR
ENGINE (CHASSIS)
RED TO SENSOR OUTPUT
10.1.6.
Knock Sensor
Measures and compares the alternating current signal from engine knock sensors.
Path:
KNOCK SENSOR
BLACK TO SENSOR BODY OR
ENGINE (CHASSIS)
RED TO SENSOR OUTPUT
Normal IAT Sensor waveform
Normal KNOCK Sensor waveform
10-4
IAT Sensor
Measured waveform decreases
as the sensor heats up.
Knock Sensor
Tapping on the engine block near
the sensor makes the sensor to
produce a voltage.
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