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Some more freeze plugs on the side of the block: . And a bad boy under the bell housing: .

The nuts are 3/8-24. Lowes may have these with free spinning washer nuts similar to the OEM nuts, otherwise use a washer under the nut.

The other day a poster on another Jeep XJ forum had a similar problem. He found bad connections inside of the ECT sensor connector. Replaced the connector and it fixed his problem. You might try having someone sit in the drivers seat while the engine is running (parking brake set) and look at...

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The Bell Housing is pass thru. The treads are in the cast iron block. The factory bolts are grade 8 for a reason. I don't see the reasoning behind anyone wanting to use grade 5 bolts in this application. The OP is aware of the source of grade 8 flange bolts (from another forum).

They're M10x1.5 button heads but I can't remember the Torx bit size (sorry). You may want to take several sizes with you.

Try these tests of the MAP sensor. Read the notes as well. . . Switch to RUN, engine off. . Engine at idle. .

Coil test procedures: . Cracked coil: .

FYI, here's a TPS test procedures chart. I use a safety pin as a back probe. .

Here's a spark plug application chart and a tech tips letter pertaining to the use of NGK ZFR5N plugs. . .

2001 diagnostics manual: P0705-RANGE SENSOR When Monitored: Continuously with the key on. Set Condition: No Transmission Range Sensor signals are received or two conflicting signals are received from the Transmission Range Sensor at the same time by the TCM. POSSIBLE CAUSES PCM PARK/NEUTRAL...

Recommend using safety pins to insert in to the connector pin cavities when doing the tests.

Yes.

P1694 is a fault in companion module - No CCD messages received from the PCM - AW4. P1698 is no TCM message from TCM. In the past there have been reports that the TCM has caused your fault(s). Try unplugging the TCM and see if the NoBus message goes away and all gauges work. If so, replace...

Pic of PDC fuses. '97 is pretty much the same. I only see one 25 Amp mini fuse. . '97 PDC diagram: .

Sounds like the IOD fuse is blown. #9, 10 Amp fuse in fuse block. If the fuse is blown something is causing it to blow. You'll need to isolate which circuit is shorted. .

Not to be mean, but....If you have to ask where the PCM is I suggest that you get a Factory Service Manual for your XJ. Pacific Coast Manuals sells pdf download FMS's.

Look at the Mopar America link in post #7.

Just FYI: http://www.moparamerica.com/oe-mopar/4874373ab IAC Stepper Motor tests: .