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  Topic Review (Newest First)
06-01-2015 01:33 AM
mukluk
Quote:
Originally Posted by CatfishsLJ View Post
Do know how they share grounds or where they share it?
Short answer -- every engine sensor, as well as the vehicle speed sensor, fuel pump module, transmission control module, and the cruise control switches via the clockspring are all grounded together through the PCM (pin 4 of connector C1) using a single wire with multiple splices. The PCM completes the ground circuit through one of three other pins to a common gang ground at G105.
06-01-2015 12:27 AM
CatfishsLJ
Quote:
Originally Posted by ElDuderino762 View Post
Glad you got it! And to answer you chevy, the tps and clockspring share grounds.
Do know how they share grounds or where they share it?
05-31-2015 06:31 PM
ElDuderino762 Glad you got it! And to answer you chevy, the tps and clockspring share grounds.
05-31-2015 01:13 PM
CatfishsLJ Well I'll be damned spent another 8 hours trying to figure this mess out, so started off reading village again on new and old tps finally found the schematics for the tps stuff did resistance checks all good was think it was comp for a while be code would not clear no matter what I did, was about to order a new PCM when I remembered you're comment on the clock spring so I said what the heck can it hurt unplugged it and wallah like it was new again, codes cleared everything seems to be working fine so thanks guys!
05-31-2015 09:54 AM
chevy2169
Quote:
Originally Posted by ElDuderino762 View Post
Before I went hunting bad connections, id take 10 minutes and unplug that clockspring, clear codes and see what, if anything comes back. Those two codes could be related to one another.
Bad connections shouldn't take long to spot, so it's worth doing. The clockspring has to do with the airbag, I'd be interested to see on an EWD how it would back feed the TPS. Anything is possible. Where have you seen it do this before? Unplugging the horn relay shouldn't affect it at all. If you are going to unplug it, make sure you disconnect the battery and wait 90 seconds before proceeding. Just as a safety measure.
05-30-2015 12:48 AM
ElDuderino762 Before I went hunting bad connections, id take 10 minutes and unplug that clockspring, clear codes and see what, if anything comes back. Those two codes could be related to one another.
05-29-2015 09:10 AM
CatfishsLJ
Quote:
Originally Posted by ElDuderino762 View Post
The clockspring is behind the steering wheel. Take off the plastic around the steering column and disconnect it. I think you can also just unplug the horn relay to test it too, but im not 100% sure on that. It sounds crazy, but that clockspring will short out and backfeed the tps causing the 123 code.
So I did some more reading, my clock spring is probably busted yes, my cruise has never worked or randomly kicks on ever since I've hard it, but now it's also kicking the code P1596 I also did a lot of reading on common electrical problems with Jeeps, on the image all but the dim lights are my symptoms so I'm going to do a hard clean on the connections to the battery and do some wire reading if I have to.
05-28-2015 09:15 PM
ElDuderino762 The clockspring is behind the steering wheel. Take off the plastic around the steering column and disconnect it. I think you can also just unplug the horn relay to test it too, but im not 100% sure on that. It sounds crazy, but that clockspring will short out and backfeed the tps causing the 123 code.
05-27-2015 06:15 PM
CatfishsLJ
Quote:
Originally Posted by ElDuderino762 View Post
Did you unnplug the clockspring and see if it quits?
whats the clockspring and how could it stop it? if it does what do I need to change?
05-16-2015 08:43 PM
ElDuderino762 Did you unnplug the clockspring and see if it quits?
05-16-2015 04:55 AM
CatfishsLJ
Quote:
Originally Posted by chevy2169 View Post
Quote:
Originally Posted by CatfishsLJ
Just an idea I took it in to a mechanic I know just to get a face to face opinion he read the codes did a diagnosis for me this is what he said, "found two codes p0123, p1596, voltage to TPS is flashing 5 volts, volts will not change even when unplugged. Believe it is a short or ECM problem. Also dirt/mud in ADAL connector (no idea what this is) possible water damage recommend dealer." I did have this issue after pressure washing the engine block so that's the full story hit me with your inputs
Maybe the PCM/ECM ended up getting wet when you sprayed the engine. Sometimes time is worth more than money, so you may consider the dealer like your mechanic suggested. They'll find it.
Thanks man I am out of options so dealer it is I guess
05-15-2015 10:15 AM
chevy2169
Quote:
Originally Posted by CatfishsLJ
Just an idea I took it in to a mechanic I know just to get a face to face opinion he read the codes did a diagnosis for me this is what he said, "found two codes p0123, p1596, voltage to TPS is flashing 5 volts, volts will not change even when unplugged. Believe it is a short or ECM problem. Also dirt/mud in ADAL connector (no idea what this is) possible water damage recommend dealer." I did have this issue after pressure washing the engine block so that's the full story hit me with your inputs
Maybe the PCM/ECM ended up getting wet when you sprayed the engine. Sometimes time is worth more than money, so you may consider the dealer like your mechanic suggested. They'll find it.
05-14-2015 09:18 PM
CatfishsLJ
Quote:
Originally Posted by chevy2169 View Post
Quote:
Originally Posted by CatfishsLJ
The TPS signal wire is getting 5 volts but it's flashing (not steady current) (also reading wires awesome my sort of task) I don't see any damage on connectors no reason for a wire to break but it is definitely shorting. What now?
I believe the signal wire is supposed to pulse. The 5 volt reference wire should be a steady voltage.

You could check voltage drops to be sure. Just check voltage at different positions of the wire.
Just an idea I took it in to a mechanic I know just to get a face to face opinion he read the codes did a diagnosis for me this is what he said, "found two codes p0123, p1596, voltage to TPS is flashing 5 volts, volts will not change even when unplugged. Believe it is a short or ECM problem. Also dirt/mud in ADAL connector (no idea what this is) possible water damage recommend dealer."
I did have this issue after pressure washing the engine block so that's the full story hit me with your inputs
05-14-2015 11:41 AM
chevy2169
Quote:
Originally Posted by CatfishsLJ
The TPS signal wire is getting 5 volts but it's flashing (not steady current) (also reading wires awesome my sort of task) I don't see any damage on connectors no reason for a wire to break but it is definitely shorting. What now?
I believe the signal wire is supposed to pulse. The 5 volt reference wire should be a steady voltage.

You could check voltage drops to be sure. Just check voltage at different positions of the wire.
05-14-2015 07:46 AM
CatfishsLJ
Quote:
Originally Posted by chevy2169 View Post
Quote:
Originally Posted by CatfishsLJ
P0123 and a random Evap code that's been on it since I've gotten it
1. Check the Throttle Position Sensor (TPS). Unplug the TPS connector and check the signal wire for 5 volts.

2. If OK, jumper the signal wire to the sensor ground and it should go to near 0 volts if the sensor ground is good.

3. Check the 5 volt reference wire.

4. If the wiring is OK, replace the TPS.
The TPS signal wire is getting 5 volts but it's flashing (not steady current) (also reading wires awesome my sort of task) I don't see any damage on connectors no reason for a wire to break but it is definitely shorting. What now?
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