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2003 Nissan Altima S, ECM/Inputs/Outputs Waveform
Posted to the Waveform Library on 4/6/2017

Sorry for the picture of the scope - No way to transfer it to computer.

This is Cam vs Crank signal. Time span 20 ms/div Volts is 5v/div Crank is higher frequency (lower) waveform Cam is upper waveform.

Cam signal goes up to 10 v then drops to about 5v and then goes negative and returns to zero. 0 v line for cam is directly above top of crank signal approx 4 div from bottom.

0 v line for crank is lowest horizontal line at about 2 div from the bottom. Crank matches known good waveforms

Nicholas J Wiseman
St. Christopher's Auto Diagnostics
Rathdrum, Idaho, USA


car Vehicle Data

2003 Nissan Altima S 2.5L

Engine2.5 L / 4 cyl / GAS
Trans4-speed AutomaticTransaxle (Electronic)
DeliveryFuel Injection