Suzuki GRAND VITARA JB416, Service Manual

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1A-66 Engine General Information and Diagnosis:
Reference waveform No.29
Oil control valve signal with engine racing (for M16
engine)
Reference waveform No.30
CAN communication line signal with ignition switch
turned ON
Reference waveform No.31
Ignition coil signal and fuel injector signal with engine
cranking
Measurement
terminal
CH1: “C37-60” to “C37-59”
Oscilloscope
setting CH1: 5 V/DIV
TIME: 400
µ
s/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Drive vehicle at 20 km/h (12 mph)
and depress accelerator pedal
fully
1. Accelerator pedal depressed fully
2. Accelerator pedal depressed partially
3. Oil control valve signal
4. ON signal
5. OFF signal
Measurement
terminal CH1: “E23-4” to “C37-58”
CH2: “E23-19” to “C37-58”
Oscilloscope
setting CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 40
µ
s/DIV
Measurement
condition
Ignition switch turned ON
(Signal pattern is depending on
communication data)
1. CAN communication line signal (High)
2. CAN communication line signal (Low)
I4RS0B110075-01
I5JB0A110094-01
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-21” to “C37-58”
CH3: “C37-1” to “C37-58”
CH4: “C37-22” to “C37-58”
Oscilloscope
setting
CH1: 5 V/DIV, CH2: 5 V/DIV
CH3: 50 V/DIV, CH4: 10 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at cranking
[A]: For J20 engine
[B]: For M16 engine
1. Cylinder reference signal (CMP reference signal)
2. Ignition coil signal
3. No.1 fuel injector signal
4. Engine start signal
I5JB0A110095-01