High pressure fuel pump control (-) signal

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: High Pressure Fuel Pump Control (-) Signal Graph

Courtesy of MAZDA MOTORS CORP.

PCM terminals

1EF(+)-body ground(-)

Oscilloscope setting

10 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

Idle after warm up