Suzuki GRAND VITARA Owner's Manual page 278

1A-223 Engine General Information and Diagnosis:
Reference waveform No.1
Fuel injector signal (1) with engine idling
Measurement
CH1: "C37-2" to "C37-58"
terminal
Oscilloscope CH1: 20 V/DIV
setting TIME: 1 ms/DIV
• After warmed up to normal
Measurement
operating temperature
condition
• Engine at specified idle speed
2. Fuel injection pulse width: 2-4 msec.
3. 10 – 14 V
Reference waveform No.2
No.1 fuel injector signal (2) with engine idling
Measurement CH1: "C37-52" to "C37-58"
terminal CH2: "C37-1" to "C37-58"
Oscilloscope CH1: 5 V/DIV, CH2: 20 V/DIV
setting TIME: 40 ms/DIV
• After warmed up to normal
Measurement
operating temperature
condition
• Engine at specified idle speed
1. Cylinder reference signal (CMP reference signal)
3. 720° crank angle
Reference waveform No.3
No.2 fuel injector signal (2) with engine idling
Measurement
terminal
Oscilloscope
setting
Measurement
condition
I5JB0A110074-01
1. Cylinder reference signal (CMP reference signal)
3. 720° crank angle
Reference waveform No.4
EGR valve signal
Measurement
terminal
Oscilloscope
setting
Measurement
condition
I5JB0A110075-01
1. EGR valve stepper motor coil 1 signal
2. EGR valve stepper motor coil 2 signal
3. EGR valve stepper motor coil 3 signal
4. EGR valve stepper motor coil 4 signal
5. ON signal
6. OFF signal
CH1: "C37-52" to "C37-58"
CH2: "C37-2" to "C37-58"
CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV
• After warmed up to normal
operating temperature
• Engine at specified idle speed
CH1: "C37-5" to "C37-58"
CH2: "C37-6" to "C37-58"
CH3: "C37-3" to "C37-58"
CH4: "C37-4" to "C37-58"
CH1: 20 V/DIV, CH2: 20 V/DIV
CH3: 20 V/DIV, CH4: 20 V/DIV
TIME: 40 ms/DIV
Engine at cranking
I5JB0A110076-01
I4RS0B110053-01