Suzuki GRAND VITARA JB416, Service Manual

Page: 83 / 474

Engine General Information and Diagnosis: 1A-65
Reference waveform No.25
Manifold absolute pressure sensor signal (1) with engine
racing
Reference waveform No.26
Knock sensor signal at engine speed 4000 r/min.
Reference waveform No.27
Knock sensor signal at engine speed 4000 r/min.
Reference waveform No.28
Oil control valve signal with engine idling (for M16
engine)
Measurement
terminal CH1: “C37-55” to “C37-57”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine racing
2. Throttle position sensor (main) signal
3. Racing
4. Idle
Measurement
terminal
CH1: “C37-56” to “C37-58”
Oscilloscope
setting CH1: 1 V/DIV
TIME: 10 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
I5JB0A110093-01
I4RS0B110072-01
Measurement
terminal
CH1: “C37-56” to “C37-58”
Oscilloscope
setting CH1: 1 V/DIV
TIME: 200
µ
s/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
Measurement
terminal
CH1: “C37-60” to “C37-59”
Oscilloscope
setting CH1: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition At the moment of the ignition switch
turned on
1. ON signal
2. OFF signal
3. Only duty cycle
I4RS0B110073-01
I4RS0B110074-01