cruiser54 Posted December 21, 2013 Share Posted December 21, 2013 Here's the latest, and hopefully simplest, revision of my Renix TPS instructions. Hornbrod will get them into my signature link sometime soon. The older ones were a bit confusing and I think these will be easier to follow and understand. RENIX TPS ADJUSTMENT Before attempting to adjust your TPS, there are two things that need to be done. 1) 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. 2) With the Key OFF, and using the positive (red) lead of your ohmmeter, set on the lowest scale, 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. TPS ADJUSTMENT FOR ENGINE ISSUES Both RENIX manual and automatic transmission equipped XJs and MJs have a flat three-wire connector to the TPS which provides data input to the ECU. The three wires in the connector are clearly embossed with the letters A, B, and C. Wire "A" is positive. Wire "B" is ground. DO NOT UNPLUG THE CONNECTORS !! 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. Loosen both T-20 Torx screws attaching the TPS to the throttle body and rotate the TPS until you have achieved your desired output voltage. Tighten the screws carefully while watching to see that your output voltage remains where it is supposed to be. If you can't achieve the correct output voltage, replace the TPS and start over. Sometimes, after adjusting your TPS the way outlined above, you may experience a high idle upon starting. If that happens, shut the engine off and reconnect your probes to B and C. Start the engine and while watching your meter, turn the TPS clockwise until the idle drops to normal and then rotate it back counterclockwise to your desired output voltage. TPS ADJUSTMENT FOR AUTOMATIC TRANSMISSION ISSUES RENIX automatic transmission equipped XJs and MJs have 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 outlined above—FOR ALL 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. THIS SQUARE FOUR WIRE CONNECTOR IS USED FOR TRANSMISSION/SHIFTING RELATED ISSUES ONLY. First off, DO NOT UNPLUG THE CONNECTORS !! Key ON, measure voltage between "A" positive and "D" ground by back-probing the connector. 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 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. The square 4 wire connector is just not used. Revised 12-15-2013 Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted December 21, 2013 Share Posted December 21, 2013 Although I had no trouble following your previous version of the TPS adjustment tip, I do see how this is a little easier to follow. Thank you cruiser for once again being flipping awesome and sharing your wealth of Jeep knowledge. Also, I'm glad to see that you're not completely gone from CC. You are a great asset to myself and other members. Link to comment Share on other sites More sharing options...
cruiser54 Posted December 21, 2013 Author Share Posted December 21, 2013 Glad you like it. I'm back for sure. Just had some issues with "management" editing/removing my posts/threads that they thought they were offensive....They probably were. But they were gentle and extremely true!!!! It's all good now. Link to comment Share on other sites More sharing options...
Keyav8r Posted December 21, 2013 Share Posted December 21, 2013 I've been on the forum for less than two years and during that period I've never seen an offensive post from you. Frustrated? Yes! But still a good bit kinder than I would have been and everyone who knows me knows I'm a gentle soul (LOL). Sounds like someone needs to (a) pull on their big boy panties and (b) stop multi-commenting on every topic. Seeing 47 responses from one person on a thread gives me a case of red a$$. Keep the tips coming! Link to comment Share on other sites More sharing options...
cruiser54 Posted December 21, 2013 Author Share Posted December 21, 2013 Enjoy. Let me know how the newest tips look to you. Link to comment Share on other sites More sharing options...
HOrnbrod Posted December 22, 2013 Share Posted December 22, 2013 Here's the latest, and hopefully simplest, revision of my Renix TPS instructions. Hornbrod will get them into my signature link sometime soon. They be in. :cheers: Link to comment Share on other sites More sharing options...
cruiser54 Posted December 22, 2013 Author Share Posted December 22, 2013 Right on brutha!! Link to comment Share on other sites More sharing options...
Keyav8r Posted December 23, 2013 Share Posted December 23, 2013 I used the "old" TPS instructions on my 88 and had no trouble following them. Since then I've put a new timing chain set in the truck. Don't know if that should have any effect on the TPS adjustment, but I'll put a re-check with the new instructions on my "to do before I sell" list. Link to comment Share on other sites More sharing options...
cruiser54 Posted December 23, 2013 Author Share Posted December 23, 2013 I used the "old" TPS instructions on my 88 and had no trouble following them. Since then I've put a new timing chain set in the truck. Don't know if that should have any effect on the TPS adjustment, but I'll put a re-check with the new instructions on my "to do before I sell" list. You should be fine. The instructions were ACCURATE, just difficult for some to follow. For some reason people gravitated to the "trans side" plug when working on engine/driveability issues. Link to comment Share on other sites More sharing options...
JoeLAW Posted May 15, 2014 Share Posted May 15, 2014 Hi "cruiser54" Thanks for explaining what the 6 wires do on the TPS for Renix's with an auto tranny, But I still have a question, and I really hope you can help me and appreciate it in adnvance. My question is I've been working on my MJ and the PO changed the engine from the Renix to a '06 HO out of a TJ.. Anyways instead of leaving the original '06 Intake manifold and TB etc. he installed the older Renix Intake manifold, long story short, now that I've been working on the truck I changed the intake back to a HO one of a '96 XJ, and installed a new 62mm Jeepers and Creepers TB, and of course the sensors are not the same, so I was thinking of just spliting and conecting cables, but since I won't have those 3 cables for the tranny on the new HO TPS will my MJ just not shift at all? Also do any of you guys know if I even need a newer style HO MAP sensor, or am I good with the old one? As I said before any help is greatly appreciated, and sorry if I'm not clear on my thoughts please let me know so I can try to explain 'em better Link to comment Share on other sites More sharing options...
cruiser54 Posted May 15, 2014 Author Share Posted May 15, 2014 Hi "cruiser54" Thanks for explaining what the 6 wires do on the TPS for Renix's with an auto tranny, But I still have a question, and I really hope you can help me and appreciate it in adnvance. My question is I've been working on my MJ and the PO changed the engine from the Renix to a '06 HO out of a TJ.. Anyways instead of leaving the original '06 Intake manifold and TB etc. he installed the older Renix Intake manifold, long story short, now that I've been working on the truck I changed the intake back to a HO one of a '96 XJ, and installed a new 62mm Jeepers and Creepers TB, and of course the sensors are not the same, so I was thinking of just spliting and conecting cables, but since I won't have those 3 cables for the tranny on the new HO TPS will my MJ just not shift at all? Also do any of you guys know if I even need a newer style HO MAP sensor, or am I good with the old one? As I said before any help is greatly appreciated, and sorry if I'm not clear on my thoughts please let me know so I can try to explain 'em better 2 different systems. If it were me, I would leave the engine management system all Renix for simplicity. Link to comment Share on other sites More sharing options...
JoeLAW Posted May 15, 2014 Share Posted May 15, 2014 Crap :oops: oh well so there is a TPS adapter from ah HO TB to a renix? Link to comment Share on other sites More sharing options...
cruiser54 Posted May 15, 2014 Author Share Posted May 15, 2014 Crap :oops: oh well so there is a TPS adapter from ah HO TB to a renix? Yep. From HESCO for $180. Some guys have adapted them on their own though. Link to comment Share on other sites More sharing options...
JoeLAW Posted May 15, 2014 Share Posted May 15, 2014 Well after I posted that comment last night, I started looking at homebrewed conversions, and yeah I'm just going to make my own one. Hopefully everything will come out good, thanks again! And wish me luck! Link to comment Share on other sites More sharing options...
JoeLAW Posted May 22, 2014 Share Posted May 22, 2014 Well I made my own TPS adapter, check out my build thread, to check it out. It came out very good, I'm very proud of it! I didnt want to start another thread on the how to, but if you guys think I should let me know. Link to comment Share on other sites More sharing options...
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