Suzuki GRAND VITARA JB416, Service Manual

Page: 81 / 474

Engine General Information and Diagnosis: 1A-63
Reference waveform No.20
CMP sensor signal with engine idling Reference waveform No.21
CMP sensor signal with engine idling
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-51” to “C37-36” (for J20
engine), “C37-58” (for M16 engine)
Oscilloscope
setting CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 20 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
[A]: For J20 engine
[B]: For M16 engine
1. Cylinder reference signal (CMP reference signal)
2. CKP signal
3. 360
°
crank angle
4. 4 – 5 V
5. 36 – 6 = 30 CKP pulse
I5JB0A110091-01
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-51” to “C37-36” (for J20
engine), “C37-58” (for M16 engine)
Oscilloscope
setting CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 10 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
[A]: For J20 engine
[B]: For M16 engine
1. Cylinder reference signal (CMP reference signal)
2. CKP signal
3. 30
°
crank angle
4. 10
°
crank angle
5. 360
°
crank angle
6. 36 – 6 = 30 CKP pulse
I5JB0A110092-02