Car Alarms: pathfinder tach, camshaft sensor, 2007 nissan pathfinder

Question
Where do I find the tach wire on a 2007 nissan pathfinder? What color is it?

Answer
The notes say:
"UNCOMMON COIL"

THIS VEHICLE'S TACHOMETER SIGNAL IS SENT
THROUGH A DATABUS LINE.

YOU MUST USE A CRANKSHAFT OR
CAMSHAFT POSITION SENSOR OR A
FUEL INJECTOR SIGNAL WIRE.

The Camshaft Sensor Is BLUE (-)  
AT The ECM MODULE ON PASSENGER SIDE
OF FIREWALL UNDER HOOD.

That's all I have on it.

ALARMTEK
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