Suzuki GRAND VITARA Owner's Manual page 286

1A-231 Engine General Information and Diagnosis:
Reference waveform No.25
Manifold absolute pressure sensor signal (1) with engine
racing
Measurement CH1: "C37-55" to "C37-57"
terminal CH2: "C37-54" to "C37-41"
Oscilloscope CH1: 2 V/DIV, CH2: 2 V/DIV
setting TIME: 200 ms/DIV
• After warmed up to normal
Measurement
operating temperature
condition
• Engine racing
2. Throttle position sensor (main) signal
3. Racing
4. Idle
Reference waveform No.26
Knock sensor signal at engine speed 4000 r/min.
Measurement
CH1: "C37-56" to "C37-58"
terminal
Oscilloscope CH1: 1 V/DIV
setting TIME: 10 ms/DIV
• After warmed up to normal
Measurement
operating temperature
condition
• Run engine at 4000 r/min.
Reference waveform No.27
Knock sensor signal at engine speed 4000 r/min.
Measurement
terminal
Oscilloscope
setting
Measurement
condition
Reference waveform No.28
I5JB0A110093-01
Oil control valve signal with engine idling (for M16
engine)
Measurement
terminal
Oscilloscope
setting
Measurement
condition
1. ON signal
2. OFF signal
3. Only duty cycle
I4RS0B110072-01
CH1: "C37-56" to "C37-58"
CH1: 1 V/DIV
TIME: 200 µs/DIV
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
CH1: "C37-60" to "C37-59"
CH1: 5 V/DIV
TIME: 2 ms/DIV
At the moment of the ignition switch
turned on
I4RS0B110073-01
I4RS0B110074-01