Reference
INSPECTION USING OSCILLOSCOPE
Ox Signal Waveform
1 V
0 V
200 msec./Division
• With the engine racing (4,000 rpm) measure
waveform between terminals OX1 and E1 of
engine control module.
HINT: The correct waveform is as shown oscillating
between approx. 0.1 V and 0.9 V
1 V
0 V
200 msec./Division
If the oxygen sensor has deteriorated, the amplitude of the
voltage will be reduced as shown on the left.
FI8514
FI8515