Where is the PCM located on a 1994 Jeep Grand Cherokee Ladaro

XJ 94
its not bad, wana bet? 90% are not.
(i used to fix them)
so the PCM,. the FSM book covers that.
why not read that.
JEEPJX
PCM is baD ONLY WHEN inputs good, and its outputs are bad.
(and outputs not shorted) !!!
(same or all computers on earth)
lose of power to PCM or ground
or bad power.(weak, or intermittent)


Got DTC errors , post them?
innova 3140 best bank for buck on 93-95 jeeps. !!!
that is a low priced scan tool

are you having ASD relay issues?
http://www.fixkick.com/Jeeps/ASD.html


see XJ 95 here (same i think)
http://colorado4wheel.com/manuals/Jeep/XJ/

page 8D-23
engine bay next to Air cleaner.

to diagnose any car, a real scan tool is best.
or you will need a full lab of meters and scopes. like me.
the scan tool show up things the keyon/off trick does not.
http://www.fixkick.com/Jeeps/jeeps.html#poor_mans-scan

Hi there,

Not quite sure of your question....

From 1987 onwards, the timing on Jeeps is controlled by the Powertrain Control Module (PCM) and is not adjustable.

If you have a more specific question relating to camshaft sprocket alighment or timing belts, please re-post your question for an Expert to answer.

What diagnostic procedure was used to indicate the PCM was causing this issue? Were there any DTC's found? Comment back.

Hi.

The module is located under the hood, on top of the firewall and near to the coolant reservoir.

Here all modules. Click on the picture to enlarge:




Here the PCM:

Underhood, drivers side early firewall and coolant bottle.

I assume your speaking of a automomtive scanner when you mentioned no communication. Check the fuse for you PCM, its thats good your cars computer or PCM may have failed.

Hi, You may have a defective ignition coil or a glooged fuel filter and/or fuel pump. it is hard for me to say at this point. What is the fuel pressure? Are there any trouble codes pulled from the PCM?

Bad news...you have just sent your phone # around the world!!! Good news is there should be lots of doors in local scrapyards...most larger yards also work online and can locate one.

The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.