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Throttle Valve Opening Signal Circuit Check

THROTTLE VALVE OPENING SIGNAL CIRCUIT CHECK

Reference: Throttle valve opening signal is pulse.

Steps 1 - 3:

Oscilloscope waveform of throttle valve operating signal as shown in the figure. Connect oscilloscope between terminals "E61-4" and "C51-3-6" of connected ECM connector (for H27 engine model) or between terminals "E61-6" and "C51-3-26" of connected ECM (PCM) connector (for H25 engine model).