grat134

Hi i have 90 limited high output xj and i know all my problems are tps related. Iv read enough threads to know my tps is bad. Iv looked up how to replace it but i just cant figure it out. If someone can give me just easy step by step directions to adjusting it perfectly that would be great thank you.. I have a digital multimeter

PNWjeeper

I hate to break it to you but a 90 is not high output it's a RENIX, that is unless a high output was swapped in. Anyway give me a min and I can get what you are looking for

PNWjeeper

Here you are sir it's from a member here by the name of cruiser54
Also check this link its for mostly RENIX era jeeps even if you do have the HO some of these will help also.

https://www.cherokeeforum.com/f51/cr...x-tips-153657/

RENIX TPS ADJUSTMENT

Before attempting to adjust your TPS be sure the throttle body has been recently cleaned. It's especially important that the edges of the throttle butterfly are free of any carbon build-up.

IMPORTANT NOTE: Using the positive (red) lead of your ohmmeter, probe the B terminal of the flat 3 wire connector of the TPS. The letters are embossed on the connector itself. Touch the black lead of your meter to the negative battery post. Wiggle the wiring harness where it parallels the valve cover and also over near the MAP sensor on the firewall. If you see more than 1 ohm of resistance, or fluctuation in your ohms reading, some modifications to the sensor ground harness will be necessary. The harness repair must be performed before proceeding. I can provide an instruction sheet for that if needed.

MANUAL TRANSMISSION: RENIX manual transmission equipped XJs have a three-wire TPS mounted on the throttle body. This manual transmission vehicle TPS provides data input to the ECU. The manual transmission TPS has three wires in the connector and they're clearly embossed with the letters A, B, and C. Wire "A" is positive. Wire "B" is ground. Key ON, measure voltage from "A" positive to "B" ground by back-probing the connectors. Note the voltage reading--this is your REFERENCE voltage. Key ON, back-probe the connector at wires "B" and "C". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. For example: 4.82 volts X .17=.82 volts. Adjust the TPS until you
have achieved this percentage. If you can't achieve the correct output voltage replace the TPS and start over.

AUTOMATIC TRANSMISSION: RENIX automatic transmission equipped XJs has a TPS with two connectors. There is a flat three-wire connector, same as the manual transmission vehicles have, and it is tested the same as the manual transmission equipped vehicles—

FOR ENGINE MANAGEMENT RELATED ISSUES. However, the automatic TPS also has a square four-wire connector clearly embossed with the letters A,B,C, and D. It only uses three wires and provides information to the Transmission Control Module. Key ON, measure voltage between "A" positive and "D" ground. Note the voltage. This is your REFERENCE voltage. Back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be eighty-three percent of your REFERENCE voltage. For example 4.8 volts X .83=3.98 volts. Adjust the TPS until you have achieved this percentage. If you can't, replace the TPS and start over. So, if you have an automatic equipped XJ your TPS has two sides--one side feeds the ECU, and the other side feeds the TCU.
FOR AUTOMATIC TRANSMISSION RELATED ISSUES. Check the four-wire connector side of the TPS.
If you have ENGINE issues check the three-wire connector side of the TPS. For those with a MANUAL TRANSMISSION--the TPS for the manual transmission XJs is stupid expensive. You can substitute the automatic transmission TPS which is reasonably priced.
Revised 04-30-2012

grat134

Yea high out put is everything electric right?i have power locks windows seats leather interior the limited edition bigger t case? And iv came across how to do it just could you help me out by making it simpler if you could thanks for taking the time out to help me

PNWjeeper

I've never done it myself I just knew about the write up so I can't help you on that. And no a RENIX jeep is any jeep built between 86-90 it's a combination of the Renault and bendix style engine. The high output engine has about 6 more Horsepower and a different engine management system, there's plenty more but that's the jist of what I know.

cruiser54

High Output was the name for the 4.0 engine from 91 on. Limited has the same transfer case as all the other XJs.

Those instructions are as simple as it gets.

123456bmx

What problems are you having that you're attributing to the tps?
So I'll get voltage when I check the square connector while the other connector is plugged in with the key in the on position?

Just making sure because Im going to try this tommorow,I have some shifting issues that I believe are tps related.

cruiser54

Concentrate on using this part.


MANUAL TRANSMISSION: RENIX manual transmission equipped XJs have a three-wire TPS mounted on the throttle body. This manual transmission vehicle TPS provides data input to the ECU. The manual transmission TPS has three wires in the connector and they're clearly embossed with the letters A, B, and C. Wire "A" is positive. Wire "B" is ground. Key ON, measure voltage from "A" positive to "B" ground by back-probing the connectors. Note the voltage reading--this is your REFERENCE voltage. Key ON, back-probe the connector at wires "B" and "C". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. For example: 4.82 volts X .17=.82 volts. Adjust the TPS until you
have achieved this percentage. If you can't achieve the correct output voltage replace the TPS and start over.