The wavelength becomes shorter as the engine rpm increases

KNK1 Signal Waveform div

1 1 1 1 H/AWi-N

1 1 1 1

Ground

A085286E23

VV1, VV2 and NE Signal Waveforms 2 V/

j

DIV.

NE

BBBB5SHB

HI llllllli

*GND

(b)

VV1

tz

T

J:

n

T

IL

^ GND

VV2

¡Z

i

IT

m

ñ

*GND

N

20 msec./DIV.(Id

ling)

G035795E14

10 V/DIV.
4. WAVEFORM 4 Knock sensor

ECM Terminal Names

Between KNK1 and EKNK or KNK2 and EKN2

Tester Ranges

0.01 to 10 V/DIV, 0.01 to 10 msec./DIV

Conditions

Engine speed maintained at 4,000 rpm after warming up engine

HINT:

• The wavelength becomes shorter as the engine rpm increases.

• The waveforms and amplitudes displayed on the tester differ slightly depending on the vehicle.

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