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mal code 31

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turbobusa69

New Member
Joined
Sep 8, 2005
Messages
29
i keep getting a code 31 after a high boost pass, i am configured the way a friends car is and he gets no code. i have a vac line from the accu to the turbo. the accu sol is still hooked up, getting 3.8 volts from the ecm on the hot and the other wire looks good. also the coil looks good across the terminals. just wondering what else might be making the ecm activate this code? i have tried it with the map vac line hooked up and unhooked any ideas would be great thanks
 
ecm/sol 10 amp fuse, top right of fuse panel. Bad tcc lockup in the tranny. Unplug the drivers side tranny plug, make sure the ecm/sol fuse is good, and go for a rip. If it doesn't throw a code, you have found your problem.
 
my code is for the waste gate sol. which has key hot power, not sure what the tcc would have in common with this code. gnttype.com just showed causes of bad wires/bad sol/ or bad ecm. hope i dont have a ecm crapping out
 
Yes, I know. I have been through it before, was trying to save you some steps. Follow my instructions, and report back.... :)
 
Agreed, check fuse to see if its blown, if so, could be burned wiring harness leading to the solenoid Or a pinched wire inside the transmission pan,Or leading to the trans.

I had one car, the fuse was blown for some reason, installed a new fuse and never had a issue with it for 5 years.
BW
 
sure enough, blown ecm/sol fuse. replaced and took a pass, No Code now. but after a few make sure its ok beat on it passes the tranny was staying in lockup coming to a stop so it looks like my tcc is bad. thanks for the help, this might of took a while to find without this board!! thanks
 
Hi,
Good diagnosis.When I heard that low solenoid voltage, figured you had a power problem.By the way, I have seen pinched wiring in the trans cause this. It's always time for a service, so you may want to look at this. Check the filter for contact. Good job!
 
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