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Inspection Procedure Using An Oscilloscope

INSPECTION CHART

TERMINAL NO. INSPECTION ITEM INSPECTION REQUIREMENT NORMAL CONDITION (WAVEFORM SAMPLE)
103 Crankshaft position sensor Transmission range: N Idling (Vehicle stopped) Waveform A
111 Input shaft speed sensor Gear range: 3rd gear <4A/T> or 4th gear <5A/T> Driving at constant speed of 50 km/h (31 mph) in 3rd gear (1,500 - 1,800 r/min) <4A/T> or 60 km/h (37 mph) in 4th gear (1,400 - 1,700 r/min) <5A/T> Waveform B
112 Output shaft speed sensor
53 Reduction solenoid valve <5A/T>
  • Ignition switch: ON
  • Transmission range: P
  • Engine: Stopped
  • Throttle (Accelerator) opening voltage: 1 V or less
Force drive each solenoid valve (Actuator test) Waveform C
54 Torque converter clutch control solenoid
55 Overdrive solenoid valve
56 Low-reverse solenoid valve
65 Underdrive solenoid valve
66 Second solenoid valve

WAVEFORM SAMPLE 

Fig 1: Waveform Sample
G06696065Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.