H25 engine
WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Oscilloscope waveforms of CMP sensor REF signal and No.1 ignition trigger signal are as shown in the figure when connecting oscilloscope between terminal "C51-3-10" of ECM (PCM) connector connected to ECM (PCM) and ground, and between terminal "C51-2-13" and ground.