Suzuki GRAND VITARA JB416, Service Manual

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1A-58 Engine General Information and Diagnosis:
Reference waveform No.5
Generator field coil monitor signal (1) at engine idling
Reference waveform No.6
Generator field coil monitor signal (1) at engine idling
Reference waveform No.7
Heated oxygen sensor-2 signal (1) with engine idling
Reference waveform No.8
Heated oxygen sensor-2 signal (1) with engine racing
Measurement
terminal CH1: “C37-8” to “C37-58”
CH2: “C37-28” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 20 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
• All accessory switch turned off
2. Generator output control signal
Measurement
terminal CH1: “C37-8” to “C37-58”
CH2: “C37-28” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 20 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
• For a few sec. from headlight
switch turned ON
2. Generator output control signal
I5JB0A110077-01
I5JB0A110078-01
Measurement
terminal CH1: “C37-11” to “C37-57”
CH2: “C37-47” to “C37-58”
Oscilloscope
setting CH1: 200 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. Heated oxygen sensor-2 heater signal
3. One duty cycle
Measurement
terminal CH1: “C37-11” to “C37-57”
CH2: “C37-47” to “C37-58”
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. Heated oxygen sensor-2 heater signal
3. Engine racing
I5JB0A110079-01
I5JB0A110080-03