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  #1  
Old November 17th, 2018, 09:31
Black1990jeep Black1990jeep is offline
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ECU Breakout Test Unit?

For the Renix injected motors like my 1990 XJ has, does someone have a list of pin outs, and values for ohms or voltage for all the sensors?

On my old VW injected Van someone made a breakout box with digital meter that is spliced into the ecu harness for real time as you drive monitoring of the ecu sensors, O2 sensor, ecu voltage, injector pulse, temp. sensors, etc... I made a break out connector for an old injected Porsche, DJetronic system, and simply connect my volt ohm meter to it for testing while in my driveway.

I would like a simular diagnostic thing for my Jeep XJ. where is a good
location to get the sensor data?

Thanks in advance, I will keep you posted of results once I get this figured out. Maybe someone has done this before?
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  #2  
Old November 17th, 2018, 10:56
lawsoncl lawsoncl is offline
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Re: ECU Breakout Test Unit?

Quote:
Originally Posted by Black1990jeep View Post
For the Renix injected motors like my 1990 XJ has, does someone have a list of pin outs, and values for ohms or voltage for all the sensors?

On my old VW injected Van someone made a breakout box with digital meter that is spliced into the ecu harness for real time as you drive monitoring of the ecu sensors, O2 sensor, ecu voltage, injector pulse, temp. sensors, etc... I made a break out connector for an old injected Porsche, DJetronic system, and simply connect my volt ohm meter to it for testing while in my driveway.

I would like a simular diagnostic thing for my Jeep XJ. where is a good
location to get the sensor data?

Thanks in advance, I will keep you posted of results once I get this figured out. Maybe someone has done this before?



Have you seen the Renix Engine Monitor?
https://www.youtube.com/watch?v=OFOATa6HGx4

https://nickintimedesign.com/
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  #3  
Old November 18th, 2018, 00:13
uglyrenixxj uglyrenixxj is offline
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Re: ECU Breakout Test Unit?

If youre anywhere near 92563, we could link up and see qhat your jeep is doin with my mt2500.
Lemme know.
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  #4  
Old November 18th, 2018, 06:42
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cruiser54 cruiser54 is offline
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Re: ECU Breakout Test Unit?

Quote:
Originally Posted by lawsoncl View Post
This^^^^
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  #5  
Old November 19th, 2018, 08:19
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Saudade Saudade is offline
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Re: ECU Breakout Test Unit?

Your Jeep already has a diagnostic port. Just get a manual for the pin outs.
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Old November 19th, 2018, 09:42
lawsoncl lawsoncl is offline
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Re: ECU Breakout Test Unit?

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Originally Posted by Saudade View Post
Your Jeep already has a diagnostic port. Just get a manual for the pin outs.



There's not much in the way of analog data on that connector though. A couple of relay outputs, but nothing like the O2 sensor, TPS, etc that he's interested in.
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Old November 19th, 2018, 10:06
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sidewaysstarion sidewaysstarion is offline
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Re: ECU Breakout Test Unit?

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Originally Posted by lawsoncl View Post
There's not much in the way of analog data on that connector though. A couple of relay outputs, but nothing like the O2 sensor, TPS, etc that he's interested in.
But those can be easily and more accurately read by the nickintime scanner. Why guess with a volt meter when the ecu will tell you what it's seeing?
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Old November 19th, 2018, 11:14
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Saudade Saudade is offline
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Re: ECU Breakout Test Unit?

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But those can be easily and more accurately read by the nickintime scanner. Why guess with a volt meter when the ecu will tell you what it's seeing?
1. They're on Backorder

2. It at least $140

3. I can read a meter.

4. I have an FSM

Not saying it a "bad thing". just suggesting other options.
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Old November 19th, 2018, 17:06
lawsoncl lawsoncl is offline
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Re: ECU Breakout Test Unit?

Quote:
Originally Posted by Saudade View Post
1. They're on Backorder

2. It at least $140

3. I can read a meter.

4. I have an FSM

Not saying it a "bad thing". just suggesting other options.



Yup, most of the individual sensors can be backprobed easy enough. The Renix isn't that hard to troubleshoot with a meter and a little bit of know-how.
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Old November 19th, 2018, 21:03
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sidewaysstarion sidewaysstarion is offline
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Re: ECU Breakout Test Unit?

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Yup, most of the individual sensors can be backprobed easy enough. The Renix isn't that hard to troubleshoot with a meter and a little bit of know-how.
But backprobing the sensor, won't tell you if it's losing half the signal at the C100 connector. I find it best to just ask the PCM what it's seeing.
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