Suzuki SX4 Service Manual page 242

1A-192 Engine General Information and Diagnosis:
Reference waveform No.28
Ignition coil signal and fuel injector signal with engine
cranking
CH1: "C01-20" to "C01-58"
Measurement CH2: "C01-6" to "C01-58"
terminal CH3: "C01-1" to "C01-58"
CH4: "C01-48" to "C01-58"
CH1: 5 V/DIV, CH2: 5 V/DIV
Oscilloscope
CH3: 50 V/DIV, CH4: 10 V/DIV
setting
TIME: 200 ms/DIV
• After warmed up to normal
Measurement
operating temperature
condition
• Engine at cranking
[A]: For VVT model
[B]: For non-VVT model
1. Cylinder reference signal (CMP reference signal)
2. Ignition coil No.1 and No.4 signal
3. No.1 fuel injector signal
4. Engine start signal
Reference waveform No.29
Throttle position sensor main (1) and sub (2) signal
Measurement
terminal
Oscilloscope
setting
Measurement
condition
3. Accelerator pedal released
4. Accelerator pedal depressed fully
Reference waveform No.30
Pedal position sensor main (1) and sub (2) signal
Measurement
terminal
Oscilloscope
setting
Measurement
condition
I4RS0B110083-01
3. Accelerator pedal released
4. Accelerator pedal depressed fully
CH1: "C01-54" to "C01-58"
CH2: "C01-40" to "C01-58"
CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
• After warmed up to normal
operating temperature
• Ignition switch turned ON and
depress accelerator pedal fully
3 4
CH1: "E01-37" to "C01-58"
CH2: "E01-36" to "C01-58"
CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 100 ms/DIV
• After warmed up to normal
operating temperature
• Ignition switch turned ON and
depress accelerator pedal fully
1
2
3 4
1
2
3
I5RW0C110023-01
3
I5RW0C110024-01