Suzuki 2006 SX4, Service Manual

Page: 184 / 1478

1A-140 Engine General Information and Diagnosis:
Reference waveform No.3
No.2 fuel injector signal (2) with engine idling
Reference waveform No.4
HO2S signal (1) with engine idling
Reference waveform No.5
HO2S signal (1) with engine racing
Reference waveform No.6
EVAP canister purge valve signal
Measurement
terminal CH1: “C01-52” to “C01-58”
CH2: “C01-2” to “C01-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
1. Cylinder reference signal (CMP reference signal)
3. 720
°
crank angle
Measurement
terminal CH1: “C01-11” to “C01-39”
CH2: “C01-47” to “C01-58”
Oscilloscope
setting CH1: 500 mV/DIV, CH2: 10 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
2. HO2S heater signal 3. One duty cycle
I5JB0A110076-01
I7RW01110093-01
Measurement
terminal CH1: “C01-11” to “C01-39”
CH2: “C01-47” to “C01-58”
Oscilloscope
setting CH1: 500 mV/DIV, CH2: 10 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine racing
2. HO2S heater signal 3. Engine racing
Measurement
terminal
CH1: “C01-13” to “C01-58”
Oscilloscope
setting CH1: 10 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Set EVAP canister purge valve at
52% by using “Active Test” of
scan tool
1. ON signal 3. One duty cycle
2. OFF signal 4. 10 – 14 V
I7RW01110094-01
I4RS0B110067-01