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BOSCH MTS 5200 LAB SCOPE
Presented by Bob Pattengale
62
1995 NISSAN IGNITION CASE STUDY
The first sensor that was the easiest to get to was the CMP sensor. As you can see in the
waveform above, that at no time did the CMP sensor signal drop out, but the ignition pattern at
the bottom is still dropping out intermittently. This indicates that the CMP sensor is doing what it
is supposed to do and is in fact supplying a signal to the PCM and the problem is not a faulty
CMP sensor.
Pictured above is a screen capture of the CKP sensor of the subject vehicle. Again, this pattern
shows that the CKP sensor is doing what it is supposed to be doing and is in fact supplying a
good signal to the PCM and the problem is not a faulty CKP sensor but the ignition pattern at the
bottom is still dropping out intermittently.