should both the supply wire and also the signal wire have 5vdc at all time then the ign switch on, engine off? should the signal wire while cranking remain at 5vdc? why is it not measuring 0vdc 0-5-0-5-0-5vdc while cranking? hum i rated the sensor bad do you?
can someone help me. i have a 1996 jeep gc 4.0 HO. i have no fire at the coil.pull the code p0320 i check the ckps. i check the volts to the sensor with fluke dvom and i had black led on middle wire (b) and red on the end (c)signal wire. ign switch on and had 5 vdc move the red to (a)5vdc supply (wt/bk color) and it also read 5 vdc with switch on. so then i crank the engine while volt meter red led placed on (c) signal wire (rd/lg color) and the black led on the middle ground wire (b) bk/lb color). the volt meter just measures 5 vdc and not 0-5-0vdc... so does this mean that the sensor is not send a signal to the pcm so the pcm can tell the coil to fire. i also check for high resistance and conudity on the wires harness at the sensor to the pcm all tests good. can some one please tell me what i miss. please help.. thanks in advance