1999 XJ 4.0 ECM location?

Hello,


I looking for the Location of the engine control module. I may have to replace it.

I am getting a code P0112 "Intake air temp sensor voltage Low".

Since I have determined it is not the sensor buy replacing it with two different brands and resetting the computer each time, and the same code keeps triggering.

My local Mechanic believes that its is the ECM and should be replaced.

A friend in the autoparts business says that part does not really need replacing very often.

Also a member on this forum, thought it may be just bad connection.

I think maybe it may be a bad connection around the ecm, which is causing low voltage going to the intake air sensor. I just need to locate it and check it out.

Thanks you

Jackate

Drivers side fender near vehicle front. Has three big connectors. You could just unplug and reconnect them a few times, or maybe pick up a can of electrical contact cleaner and use that too.

Great thankyou very much.

From the wiring diagram, the current to the IAT also passes through the throttle position sensor, so I'd take a look at those connections too. It should be 5 volts.

I'll make sure to check that also.

Thank you very much..