Throttle Valve Opening Signal Circuit Check

Reference:

Throttle valve opening signal is pulse.

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).

Fig 1: Identifying Oscilloscope Waveform Of Throttle Valve Operating Signal

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Throttle Valve Opening Signal Circuit Check (1 of 2)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 3: Throttle Valve Opening Signal Circuit Check (2 of 2)

Courtesy of SUZUKI OF AMERICA CORP.