Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual — part 16
1A-60 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
Engine General Information and Diagnosis: 1A-61
Reference waveform No.9
EVAP canister purge valve signal
Reference waveform No.10
No.3 fuel injector signal (2) with engine idling
Reference waveform No.11
No.4 fuel injector signal (2) with engine idling
Measurement
terminal
CH1: “C37-13” to “C37-58”
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 “Misc Test” of scan
tool
1. ON signal
2. OFF signal
3. One duty cycle
4. 10 – 14 V
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-16” to “C37-58”
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
I4RS0B110067-01
I5JB0A110081-01
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-17” to “C37-58”
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
I5JB0A110082-01
1A-62 Engine General Information and Diagnosis:
Reference waveform No.12
Ignition coil signal (1) with engine idling
Reference waveform No.13
Ignition coil No.4 signal (2) with engine idling (for J20
engine)
Reference waveform No.14
Ignition coil No.3 signal (2) with engine idling (for J20
engine)
Measurement
terminal
CH1: “C37-20” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV
TIME: 2 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
[A]: For J20 engine
[B]: For M16 engine
1. 4 – 6 V
3. Ignition coil pulse width
I5JB0A110083-02
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-18” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 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: “C37-52” to “C37-58”
CH2: “C37-19” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 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
I5JB0A110084-01
I5JB0A110085-01
Engine General Information and Diagnosis: 1A-63
Reference waveform No.15
• Ignition coil No.2 signal (1) with engine idling (for J20
engine)
• Ignition coil No.2 and No.3 signal (2) with engine idling
(for M16 engine)
Reference waveform No.16
• Ignition coil No.1 signal (1) with engine idling (for J20
engine)
• Ignition coil No.1 and No.4 signal (2) with engine idling
(for M16 engine)
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-20” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
[A]: For J20 engine
[B]: For M16 engine
3. Cylinder reference signal (CMP reference signal)
4. 720
° crank angle
I5JB0A110086-01
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-21” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 40 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
[A]: For J20 engine
[B]: For M16 engine
3. Cylinder reference signal (CMP reference signal)
4. 720
° crank angle
I5JB0A110087-02
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