Select oscilloscope function on the GDS and Connect channel "A", "B" of the VMI to CKPS/CMPS "Signal" terminal of "ECM" harness connecter.
Check CKPS/CMPS signal waveforms with IG key "START".
■ Reference signal waveform
Are CKPS and CMPS waveform normal?
![]() | ▶ Click on "Ignition coil circuit" item for more details. |
![]() | ▶ Click on "ECM circuit" item for more details. |