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General Forums => The Mess Hall => Topic started by: bootguy on July 02, 2015, 10:18:03 PM

Title: Engine sensors
Post by: bootguy on July 02, 2015, 10:18:03 PM

Are the engine sensors (Oil pressure, Temp, charging) going to both the gauges and any engine control modules?  Or are there separate sensors for each destination.  The reason I am asking is I want to replace the gauges but do not want to mess up any engine control sensors.

Title: Re: Engine sensors
Post by: Jeffy on July 02, 2015, 10:28:07 PM

No, they shouldn't be.  Though you can also get gauges that will work with the existing senders as well.  It's an old article but it mentions all of the values.  http://www.4x4wire.com/jeep/tech/interior/yjdash/

Title: Re: Engine sensors
Post by: sharpxmen on July 04, 2015, 03:37:59 AM

on YJ you have separate temp sensors for coolant temp (the one on the head close to the firewall is for the gauge, the one in the thermostat housing is for the PCM), nothing is shared between the PCM and gauges (oil pressure is not sent to the PCM). charging is just a battery voltage, no sensor involved and the gauge is just a voltmeter