cruiser54 Posted May 4, 2020 Share Posted May 4, 2020 Probably a bad TPS or a varying ground on that circuit. Link to comment Share on other sites More sharing options...
Lungshot Posted June 5, 2020 Share Posted June 5, 2020 On my '88 auto trans MJ , if I adjust the 4-pin output voltage to the required voltage, the output voltage on the 3-pin connector is not in spec, and vice versa. Which adjustment should I make? My guess is the 4-pin connector? Link to comment Share on other sites More sharing options...
cruiser54 Posted June 5, 2020 Share Posted June 5, 2020 Always on three pin . Link to comment Share on other sites More sharing options...
Lungshot Posted June 6, 2020 Share Posted June 6, 2020 Thx! BTW, adjusting the transmission connector output voltage on the new TPS didn't cure my transmission issues either, looks like it's off to the transmission shop I go! Link to comment Share on other sites More sharing options...
Pete M Posted June 6, 2020 Share Posted June 6, 2020 27 minutes ago, Lungshot said: Thx! BTW, adjusting the transmission connector output voltage on the new TPS didn't cure my transmission issues either, looks like it's off to the transmission shop I go! you should start a new thread about those issues. there are other things you can test. Link to comment Share on other sites More sharing options...
cruiser54 Posted June 6, 2020 Share Posted June 6, 2020 Yes!! Link to comment Share on other sites More sharing options...
Builtnotbought Posted November 17, 2020 Share Posted November 17, 2020 My 95 yj is throwing a high or low voltage code on the TPS. Its stutters and dies out when you step down on the paddle. I am only getting 3.87 volts coming out of the TPS. Could that be the cause and what do you do if it's not adjustable? Link to comment Share on other sites More sharing options...
Pete M Posted November 23, 2020 Share Posted November 23, 2020 On 11/17/2020 at 5:36 PM, Builtnotbought said: My 95 yj is throwing a high or low voltage code on the TPS. Its stutters and dies out when you step down on the paddle. I am only getting 3.87 volts coming out of the TPS. Could that be the cause and what do you do if it's not adjustable? you should probably put this in the Tech subforum more eyeballs will see it there rather than the DIY Link to comment Share on other sites More sharing options...
Ray Rodriguez Posted July 24, 2021 Share Posted July 24, 2021 My tps read 1.32 close throttle, would that mean the sensor its bad? Link to comment Share on other sites More sharing options...
jdog Posted July 25, 2021 Share Posted July 25, 2021 @cruiser54 Link to comment Share on other sites More sharing options...
cruiser54 Posted July 25, 2021 Share Posted July 25, 2021 Ray, what year is it? Link to comment Share on other sites More sharing options...
Ray Rodriguez Posted August 2, 2021 Share Posted August 2, 2021 1990 Link to comment Share on other sites More sharing options...
Ray Rodriguez Posted August 2, 2021 Share Posted August 2, 2021 1990 On 7/24/2021 at 11:28 PM, cruiser54 said: Ray, what year is it? Link to comment Share on other sites More sharing options...
cruiser54 Posted August 3, 2021 Share Posted August 3, 2021 Could be. Are you testing it according to my website instructions? CRUISER'S MOSTLY RENIX TIPS RENIX TPS ADJUSTMENT OCTOBER 30, 2015 SALAD 194 COMMENTS Before attempting to adjust your TPS, there are a few things that need to be done. 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. 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. It is covered in detail in Tip 6. 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. Link to comment Share on other sites More sharing options...
Ray Rodriguez Posted August 3, 2021 Share Posted August 3, 2021 Yes that's how I adjusted it the first time Link to comment Share on other sites More sharing options...
Ωhm Posted August 3, 2021 Share Posted August 3, 2021 On 7/24/2021 at 5:51 PM, Ray Rodriguez said: My tps read 1.32 close throttle, would that mean the sensor its bad? Is that as low as you can go on the adjustment? Link to comment Share on other sites More sharing options...
cruiser54 Posted August 3, 2021 Share Posted August 3, 2021 Have you completed Tip 5? Is this a replacement or original TPS? Link to comment Share on other sites More sharing options...
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