Suzuki Grand Vitara JB416 / JB420 (ESP model). Manual — part 17
1A-64 Engine General Information and Diagnosis:
Reference waveform No.17
Mass air flow sensor signal (1) with engine racing
Reference waveform No.18
A/F sensor signal with engine idling
Reference waveform No.19
Intake manifold tuning vacuum solenoid valve signal with
engine racing (for J20 engine)
Measurement
terminal
CH1: “C37-26” to “C37-27”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting
CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine racing
2. Throttle position sensor (main) signal
3. Racing
4. Idle
Measurement
terminal
CH1: “C37-38” to “C37-58”
CH2: “C37-37” to “C37-58”
CH3: “C37-32” to “C37-31”
Oscilloscope
setting
CH1: 500 mV/DIV, CH2: 500 mV/
DIV, CH3: 10 V/DIV
TIME: 100 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at specified idle speed
1. A/F sensor signal (+)
2. A/F sensor signal (–)
3. A/F sensor heater signal
4. One duty cycle
I5JB0A110088-02
I5JB0A110089-01
Measurement
terminal
CH1: “C37-33” to “C37-58”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting
CH1: 10 V/DIV, CH2: 2 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine racing
1. ON signal (IMT valve closed)
2. OFF signal (IMT valve opened)
3. Throttle position sensor (main) signal
4. Racing
I5JB0A110090-02
Engine General Information and Diagnosis: 1A-65
Reference waveform No.20
CMP sensor signal with engine idling
Reference waveform No.21
CMP sensor signal with engine idling
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-51” to “C37-36” (for J20
engine), “C37-58” (for M16 engine)
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 20 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. Cylinder reference signal (CMP reference signal)
2. CKP signal
3. 360
° crank angle
4. 4 – 5 V
5. 36 – 6 = 30 CKP pulse
I5JB0A110091-01
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-51” to “C37-36” (for J20
engine), “C37-58” (for M16 engine)
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 10 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. Cylinder reference signal (CMP reference signal)
2. CKP signal
3. 30
° crank angle
4. 10
° crank angle
5. 360
° crank angle
6. 36 – 6 = 30 CKP pulse
I5JB0A110092-02
1A-66 Engine General Information and Diagnosis:
Reference waveform No.22
Throttle actuator output signal with ignition switch turned
ON
Reference waveform No.23
Throttle actuator output signal with ignition switch turned
ON
Reference waveform No.24
Manifold absolute pressure sensor signal (1) with
ignition switch turned ON
Measurement
terminal
CH1: “C37-45” to “C37-58”
CH2: “C37-44” to “C37-58”
Oscilloscope
setting
CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Ignition switch turned ON and
accelerator pedal at idle position
1. Throttle actuator drive signal (“C37-45” terminal)
2. Throttle actuator drive signal (“C37-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
I4RS0B110081-02
Measurement
terminal
CH1: “C37-45” to “C37-58”
CH2: “C37-44” to “C37-58”
Oscilloscope
setting
CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Ignition switch turned ON and
accelerator pedal at full
depressed position
1. Throttle actuator drive signal (“C37-45” terminal)
2. Throttle actuator drive signal (“C37-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
Measurement
terminal
CH1: “C37-55” to “C37-57”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Ignition switch turned ON
2. Throttle position sensor (main) signal
I4RS0B110082-02
I4RS0B110070-01
Engine General Information and Diagnosis: 1A-67
Reference waveform No.25
Manifold absolute pressure sensor signal (1) with engine
racing
Reference waveform No.26
Knock sensor signal at engine speed 4000 r/min.
Reference waveform No.27
Knock sensor signal at engine speed 4000 r/min.
Reference waveform No.28
Oil control valve signal with engine idling (for M16
engine)
Measurement
terminal
CH1: “C37-55” to “C37-57”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine racing
2. Throttle position sensor (main) signal
3. Racing
4. Idle
Measurement
terminal
CH1: “C37-56” to “C37-58”
Oscilloscope
setting
CH1: 1 V/DIV
TIME: 10 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
I5JB0A110093-01
I4RS0B110072-01
Measurement
terminal
CH1: “C37-56” to “C37-58”
Oscilloscope
setting
CH1: 1 V/DIV
TIME: 200
µs/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
Measurement
terminal
CH1: “C37-60” to “C37-59”
Oscilloscope
setting
CH1: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition
At the moment of the ignition switch
turned on
1. ON signal
2. OFF signal
3. Only duty cycle
I4RS0B110073-01
I4RS0B110074-01
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