Suzuki Grand Vitara Service Manual page 233

Reference waveform No.12
Ignition coil signal (1) with engine idling
Measurement
CH1: "C37-20" to "C37-58"
terminal
Oscilloscope CH1: 2 V/DIV
setting TIME: 2 ms/DIV
• After warmed up to normal
Measurement
operating temperature
condition
• Engine at specified idle speed
[A]: For J20 engine
[B]: For M16 engine
1. 4 – 6 V
3. Ignition coil pulse width
Engine General Information and Diagnosis:
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Reference waveform No.13
Ignition coil No.4 signal (2) with engine idling (for J20
engine)
Measurement
terminal
Oscilloscope
setting
Measurement
condition
1. Cylinder reference signal (CMP reference signal)
3. 720° crank angle
Reference waveform No.14
Ignition coil No.3 signal (2) with engine idling (for J20
engine)
Measurement
terminal
Oscilloscope
setting
Measurement
condition
I5JB0A110083-02
1. Cylinder reference signal (CMP reference signal)
3. 720° crank angle
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CH1: "C37-52" to "C37-58"
CH2: "C37-18" to "C37-58"
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 40 ms/DIV
• After warmed up to normal
operating temperature
• Engine at specified idle speed
CH1: "C37-52" to "C37-58"
CH2: "C37-19" to "C37-58"
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 40 ms/DIV
• After warmed up to normal
operating temperature
• Engine at specified idle speed
1A-226
I5JB0A110084-01
I5JB0A110085-01