Suzuki Wagon R Manual page 2053

6-2-50 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
20. Reference waveform No.20
Manifold absolute pressure sensor signal at engine racing
Measurement CH1: E22-15 to E22-28
terminal CH2: E22-34 to E22-28
Oscilloscope CH1: 2 V/DIV, CH2: 2 V/DIV
setting TIME: 200 ms/DIV
Measurement • After warmed up to normal operating
condition temperature
• Engine racing
1. Manifold absolute pressure sensor signal
2. Throttle position sensor signal
21. Reference waveform No.21
VSS signal at 30 km/h (19 mil/h)
Measurement CH1: E21-31 to E23-1
terminal CH2: E22-19 to E23-1
Oscilloscope CH1: 5 V/DIV, CH2: 5 V/DIV
setting TIME: 40 ms/DIV
Measurement • After warmed up to normal operating
condition temperature
• Drive vehicle at 30 km/h (19 mil/h)
VSS signal for speedometer
1.
VSS signal
2.
22. Reference waveform No.22
Ignition pulse (engine revolution) signal at engine idling
Measurement CH1: E22-10 to E23-1
terminal CH2: E21-12 to E23-1
Oscilloscope CH1: 5 V/DIV, CH2: 5 V/DIV
setting TIME: 40 ms/DIV
Measurement • After warmed up to normal operating
condition temperature
• Engine at specified idle speed
1. Cylinder reference signal (CMP reference signal)
2. Ignition pulse signal