1A-64 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
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