Reference Waveform No.21 - Engine Coolant Temperature Signal At Engine Idling; Reference Waveform No.22 - Evap Canister Purge Valve Signal; Reference Waveform No.23 - Ignition Coil Signal And Fuel Injector Signal At Engine Cranking; Reference Waveform No.24 - Fuel Injector Signal At Engine Cranking - Suzuki Liana RH418 Supplementary Service Manual

1A-83 Engine General Information and Diagnosis:
21. Reference waveform No.21
Engine coolant temperature signal at engine idling
Measurement CH1: C41-14 to C41-10
terminal CH2: G03-9 to C41-1
Oscilloscope setting CH1: 500 mV/DIV, CH2: 5 V/DIV
TIME: 400 ms/DIV
Measurement • After warmed up to normal
condition
• Engine at specified idle speed
1. Engine coolant temperature signal for combination meter
2. Engine coolant temperature sensor signal
22. Reference waveform No.22
EVAP canister purge valve signal
Measurement CH1: C41-4 to C41-1
terminal
Oscilloscope setting CH1: 5 V/DIV
TIME: 40 ms/DIV
Measurement • After warmed up to normal
condition
• Drive vehicle at 40 km/h (25
operating temperature
I3RH0A110047-01
operating temperature
mil/h) or more
I3RH0A110048-01
23. Reference waveform No.23
Ignition coil signal and fuel injector signal at engine
cranking
Measurement CH1: C41-20 to C41-1
terminal CH2: C41-9 to C41-1
CH3: C41-11 to C41-1
CH4: C41-30 to C41-1
Oscilloscope setting CH1: 5 V/DIV, CH2: 50 V/DIV
CH3: 5 V/DIV, CH4: 10 V/DIV
TIME: 100 ms/DIV
Measurement • After warmed up to normal
condition
• Engine at cranking
1. Ignition coil No.1 and No.4 signal
2. No.1 fuel injector signal
3. Cylinder reference signal (CMP reference signal)
4. Starting motor signal
24. Reference waveform No.24
Fuel injector signal at engine cranking
Measurement CH1: C41-11 to C41-1
terminal CH2: C41-21 to C41-1
Oscilloscope setting CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 10 ms/DIV
Measurement • After warmed up to normal
condition
• Engine at cranking
1. Cylinder reference signal (CMP reference signal)
2. Fuel injector signal
3. Injection pulse width: 10 –14 msec.
operating temperature
I3RH0B110020-01
operating temperature
I3RH0B110021-01