Suzuki GRAND VITARA JB416, Service Manual

Page: 77 / 474

Engine General Information and Diagnosis: 1A-59
Reference waveform No.9
EVAP canister purge valve signal
Reference waveform No.10
No.3 fuel injector signal (2) with engine idling
Reference waveform No.11
No.4 fuel injector signal (2) with engine idling
Measurement
terminal
CH1: “C37-13” to “C37-58”
Oscilloscope
setting CH1: 10 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Set EVAP canister purge valve at
52% by using “Misc Test” of scan
tool
1. ON signal
2. OFF signal
3. One duty cycle
4. 10 – 14 V
Measurement
terminal CH1: “C37-52” to “C37-58”
CH2: “C37-16” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
1. Cylinder reference signal (CMP reference signal)
3. 720
°
crank angle
I4RS0B110067-01
I5JB0A110081-01
Measurement
terminal CH1: “C37-52” to “C37-58”
CH2: “C37-17” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
1. Cylinder reference signal (CMP reference signal)
3. 720
°
crank angle
I5JB0A110082-01