No communication :(
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
No . I’ll give you a link this is just a a road map kinda sorta more of understanding it to https://www.corvetteforum.com/forums...deterrent.html
it’s a twisted one but I found out my alt also needs rebuilt
it’s a twisted one but I found out my alt also needs rebuilt
Last edited by Speedy007; May 9, 2020 at 01:11 PM.
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
U may or may not be seeing ur security light doesn’t all it means it that’s u really have a open circuit if ur pcm tells bcm to start car. Pcm senses a over charge of a open circuit and goes into protect mode. Which no comm to a lot is display including fuel gauge full to empty , loss of power,tcs no comm, service soon , reduced power u know all the good stuff. Once u have cleaned the codes the pcm will respond no comm , TCS no comm ect. Because it has enabled protect mode if u follow me . Open circuit find it . If ur pulling low circuit dash should indicate charge system failure . U should follow clearing pcm because it’s already enabled protect mode. Via pulling 16 & 23 while car is set to start but not running. Turn off car in hooked battery try to get a code. As if it re established connection u can write down all the codes or screen shot them before clearing and enabling pcm safe mode. Thank you ! We can discuss more like ignition resistance memory loss but for now I think u have open circuit it could be a sensor like crank , throttle position a number of things 1 st off finding open circuit this is causing pcm to no comm ur cars modules .
Last edited by Speedy007; May 9, 2020 at 01:23 PM.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
pulled both "acordian" gromets out of the doors and pulled and tugged on all the wires
nothing amiss in there that i can detect.
check all the connections on the pcm..
arrrghhh
nothing amiss in there that i can detect.
check all the connections on the pcm..
arrrghhh
Last edited by walleyejack; May 9, 2020 at 02:04 PM.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
long shot... because i have the radio out and nothing connected, I doubt this would affect anything.
humor me and say it would.. i have no ideas left. and my eyes are bugging out of my head from
searching the webs
humor me and say it would.. i have no ideas left. and my eyes are bugging out of my head from
searching the webs
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
the original codes where
10 PCM 0102 HC
1221 H
1248 H
1278 H
U 1000
1096
and one i can t read my writing..5850 i think
There may have been another, but this is what i originally wrote down when this occurred last Sunday..
If this helps with anything ...
10 PCM 0102 HC
1221 H
1248 H
1278 H
U 1000
1096
and one i can t read my writing..5850 i think
There may have been another, but this is what i originally wrote down when this occurred last Sunday..
If this helps with anything ...
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Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
Another shot. I think it does not matter the seats are not connected also.
it has been unplugged for a month, so i don t that is affecting anything in this situation.
i m graspin at straws
it has been unplugged for a month, so i don t that is affecting anything in this situation.
i m graspin at straws
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
Here I went digging for u just because I done for now until parts come in
If the DTC U1000 or U1255 is set current, this usually indicates a module that is currently not communicating or a configuration issue. For example, if the control module is configured for an option (i.e., OnStar, keyless entry, memory mirrors, etc.) that the vehicle does not have, it may expect to receive a message regarding this missing feature. This would usually occur due to the control module being recently replaced and incorrectly set up.
When the DTC U1000 or U1255 is current, the module that is not communicating may not even be listed on the Tech 2 on the Diagnostic Circuit Check /Class 2 Message Monitor list.
If the DTC U1000 or U1255 has set in history without other DTCs, replacing the control module that set the DTC is most likely NOT the solution. The module that has set the code is looking for an input from another module that is not communicating. Because the module did not receive an input that it is expecting to see, it sets a U1000 or U1255 which indicates there was a loss of communications.
If the DTC U1000 or U1255 is set current, this usually indicates a module that is currently not communicating or a configuration issue. For example, if the control module is configured for an option (i.e., OnStar, keyless entry, memory mirrors, etc.) that the vehicle does not have, it may expect to receive a message regarding this missing feature. This would usually occur due to the control module being recently replaced and incorrectly set up.
When the DTC U1000 or U1255 is current, the module that is not communicating may not even be listed on the Tech 2 on the Diagnostic Circuit Check /Class 2 Message Monitor list.
If the DTC U1000 or U1255 has set in history without other DTCs, replacing the control module that set the DTC is most likely NOT the solution. The module that has set the code is looking for an input from another module that is not communicating. Because the module did not receive an input that it is expecting to see, it sets a U1000 or U1255 which indicates there was a loss of communications.
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
Your P0102 code is a maf code low voltage this module would be the correct module making your Christmas tree of lights . As I was trying to say earlier I had a maf issue once same Shabu of codes
Last edited by Speedy007; May 9, 2020 at 04:52 PM.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
i don t have a maf in this car, has not been one in it for 12 yrs.. so that can t be an issue, I knew that was one of the codes, 2 of the others are speed sensors. i don t see that being an issue either..
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
Can t see how this can be, but, the battery shows 14 V and 11.5 on the load test, but won t click the starter or turn over, but yet I hear the fuel pump engaging, is there any chance the battery could be pooched ? I don t see it that way with the voltage showing, but, who knows.
Intermediate
Joined: Apr 2020
Posts: 46
Likes: 7
From: NC
Can t see how this can be, but, the battery shows 14 V and 11.5 on the load test, but won t click the starter or turn over, but yet I hear the fuel pump engaging, is there any chance the battery could be pooched ? I don t see it that way with the voltage showing, but, who knows.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
maybe i will hook jumper cable up from another battery that I know is good and see how that flies.
Intermediate
Joined: Apr 2020
Posts: 46
Likes: 7
From: NC
When my seat harness was giving me the same issues you’re having I tried unplugging it with no change. If the wires are pinched/shorting before the plug it will still cause the issue.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
i will check the wires anyway,, they could be shorting.
Last edited by walleyejack; May 9, 2020 at 11:04 PM.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 8,892
Likes: 981
From: Whitby Ont.
tested 2 batteries this morning with another voltmeter.. spare is 12v in the car 13.5V
so i believe it can t be a battery issue... I tried cranking this morning after tender on all night.... nadda, zero, zilch. )&(^*%&^$&^$
strange thing is.. the battery tender was warm and still showing orange instead of green this morning.. i hooked another tender up
to it and see how that goes.. i may and pick up my buddies battery and try it just to humor me..
so i believe it can t be a battery issue... I tried cranking this morning after tender on all night.... nadda, zero, zilch. )&(^*%&^$&^$
strange thing is.. the battery tender was warm and still showing orange instead of green this morning.. i hooked another tender up
to it and see how that goes.. i may and pick up my buddies battery and try it just to humor me..