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Anyone with an 87 to 90 Renix Jeep has two or three minutes to see that their
CPS is putting out at least .35 AC volts. I don't mean to come off rude, but if you can't connect a meter and turn the key, we may not be much help.
AC voltage CPS test; Small clips on the meter leads really helps. (you need contact with those little pins while it cranks)
Unplug the connector at the back of the manifold with wires going down to the bell-housing/cps. (it's a three wire plug, with only two wires)
Probe the two wires to the cps with the meter set on AC volts. (a 200 scale on mine).
Crank the engine and note the voltage. (jump it if your battery is low)
Mine somehow works with only .3 my wiring/grounds must be pretty spiffy. .5 seems to be a good mark. One article talked of .5 to .8. **Update, it soon failed. I installed Napa #css980 in my 90, that part will work back to 87. You can also check for 200 Ohm's resistance, +/-- 75, but the ACV is what the ECU is using.
You're not coming off rude. I haven't had this rig long, but its something I want to keep and learn from. A meter never crossed my mind since I haven't really done diagnostics or major repair on a car(oil changes and plugs mainly). I just don't want to take it to shop around here since they're not really familiar with XJs. But I'm going to get this and the ground check done tomorrow when I'm not working.Originally Posted by DFlintstone
I think that is #4 Freedgr. BD, my wires to the lower sensors were miss-routed so then it warmed up, the heat shield would expand and ground out some sensor wires, then act like yours. Only took me about a year to figure it out. As far as a digital meter, the $5 one at Harbour Freight will actually work, at least for a while. Then I guess you can get them for $20 all over. You pretty much need one to do much with a Renix Jeep.Anyone with an 87 to 90 Renix Jeep has two or three minutes to see that their
CPS is putting out at least .35 AC volts. I don't mean to come off rude, but if you can't connect a meter and turn the key, we may not be much help.
AC voltage CPS test; Small clips on the meter leads really helps. (you need contact with those little pins while it cranks)
Unplug the connector at the back of the manifold with wires going down to the bell-housing/cps. (it's a three wire plug, with only two wires)
Probe the two wires to the cps with the meter set on AC volts. (a 200 scale on mine).
Crank the engine and note the voltage. (jump it if your battery is low)
Mine somehow works with only .3 my wiring/grounds must be pretty spiffy. .5 seems to be a good mark. One article talked of .5 to .8. **Update, it soon failed. I installed Napa #css980 in my 90, that part will work back to 87. You can also check for 200 Ohm's resistance, +/-- 75, but the ACV is what the ECU is using.
CF Veteran
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I think you check it at the plug first, then if it aint getten to the ECU that is looked at. (and the C-101). BD I was off above, thought he said Coil. Renix will start and run fine with the wires to to Dizy unplugged. You can still check the connection, but I doubt that is it.Originally Posted by freegdr
Also would that cps wiring fix recall have anything to do with this issue ?
Oh! I had that above "canned"....
CF Veteran
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Meant under coil oooppps and theres a module under the coil ...at 2.25 on video theres a module ....
Originally Posted by bdcontraplayr
Under the distributer? Haven't checked, not sure how or where.
CF Veteran
Im wondering if its getting hot and causing this issue..http://www.jeep4x4center.com/ignitio...-33002299.html
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Yeah, I got that. Cleaned it up todayOriginally Posted by freegdr
Meant under coil oooppps and theres a module under the coil ...at 2.25 on video theres a module ....Video Link: http://www.youtube.com/watch?v=sjNO3589YzY
OK so hopefully I did it right, I got a meter and set it to the RX1K on the ohms side and made sure it was zeroed out. When I probed in the connection for the CPS going into the ECU it shoot up to a little less than 8 on the meter. I think I'm doing it right
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cruiser54
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May 16, 2024
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Quote:
No. Unplug the CPS. Probe the connector going to it, one probe on each connector. Set your Meter to AC volts. Have someone crank the Jeep over and read the meter.Originally Posted by bdcontraplayr
OK so hopefully I did it right, I got a meter and set it to the RX1K on the ohms side and made sure it was zeroed out. When I probed in the connection for the CPS going into the ECU it shoot up to a little less than 8 on the meter. I think I'm doing it right
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No. Unplug the CPS. Probe the connector going to it, one probe on each connector. Set your Meter to AS volts. Have someone crank the Jeep over and read the meter.
Should I put it on 10, 50, 250, or 500?Originally Posted by cruiser54
No. Unplug the CPS. Probe the connector going to it, one probe on each connector. Set your Meter to AS volts. Have someone crank the Jeep over and read the meter.
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No. Unplug the CPS. Probe the connector going to it, one probe on each connector. Set your Meter to AS volts. Have someone crank the Jeep over and read the meter.
Well it really doesn't matter which, tried all of them and they didn't move the needle at allOriginally Posted by cruiser54
No. Unplug the CPS. Probe the connector going to it, one probe on each connector. Set your Meter to AS volts. Have someone crank the Jeep over and read the meter.
I think he meant to type AC volts. If your meter is auto ranging it might not pick up such a low AC or (alternating current) voltage. Auto ranging automatically selects the range and if it's not fast enough or sensitive enough than it might not pick up anything. Come to think of it you shouldn't have that many options on volts. It seems you are putting your meter on resistance or ohms instead of volts.
CF Veteran
Oh Gosh. That is an analogue meter. Guess we could have been more clear. When I said "digital meter", the "digital" really mattered! I wonder if you could take it back? Even on the 10 volt AC scale no way will you be able to tell between .2, and .5 ACV. Likewise on resistance telling between one or three ohms is likely not possible. I gotta run...
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OK, yeah I could take it back. I got to shop around since I only stopped at one place and it was either $10 or $65. Some I opted for the cheaper since I figured it was the same thingOriginally Posted by DFlintstone
Oh Gosh. That is an analogue meter. Guess we could have been more clear. When I said "digital meter", the "digital" really mattered! I wonder if you could take it back? Even on the 10 volt AC scale no way will you be able to tell between .2, and .5 ACV. Likewise on resistance telling between one or three ohms is likely not possible. I gotta run...