Toyota Camry Manual page 1312

KNK Signal Waveforms
0.5 V
/Division
0 V
5 msec./Division
200 mV
/Division
0 V
100 µsec./Division
FI6510
FI6607
Type I
2 Check for open and short in harness and connector between EC1 connector and
ECM (See page IN–31).
OK
Check and replace ECM (See page IN–31).
DIAGNOSTICS – ENGINE (1MZ–FE)
Reference INSPECTION USING OSCILLOSCOPE
D
With the engine racing (4,000 rpm), measure between
terminals KNKR, KNKL of the ECM connector and body
ground.
HINT:
The correct waveforms are as shown.
D
Spread the time on the horizontal axis, and confirm that
period of the wave is 141 µsec.
(Normal mode vibration frequency of knock sensor:
7.1 kHz)
HINT:
If normal mode vibration frequency is not 7.1 kHz, the sensor
is malfunctioning.
A00113
Type II Go to step 3 .
NG Repair or replace harness or connector.
Author : Date :
DI–285
520