Fuel Pump Control Module (Diagnostic) Signal

Fig 1: Fuel Pump Control Module (Diagnostic) Wave Pattern Signal

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 2AX (+)-body ground (-)

Oscilloscope setting 

• 2 V/DIV (Y), 50 ms/DIV (X), DC range

Vehicle condition 

• Idle after warm up