Cooling fan control signals

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

PCM terminals

1W(+)-1AA(-)

Oscilloscope setting

5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition

Idle after warm up (engine speed approx. 700 rpm, A/C ON)

Fig 1: Inspection Graph Of Cooling Fan Control Signals Using Oscilloscope
Courtesy of MAZDA MOTORS CORP.