A friends S70 is wonky after a jump start

2553 Views 7 Replies 5 Participants Last post by 850arrrsaylikepirate, Apr 9, 2009

850arrrsaylikepirate

Discussion Starter · Mar 26, 2009

Like the title says, my friend has a 1999 S70 GLT, automatic, with 100k miles.

His son left the dome light on and killed the battery.

After jump starting the car, the check engine light is on, along with the flashing up arrow. The car drives like its stuck in 3rd gear.

The battery was looking poor so he replaced it and left the car disconnected for about 40 minutes hoping to reset the computer. Still the same issues.

I pulled the following codes:

P0751 shift solenoid a performance or stuck off

P0605 internal control module read only memory (rom) error

So what do you guys think?

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heavyiron

· #2 · Mar 28, 2009

Re: A friends S70 is wonky after a jump start (850arrrsaylikepirate)

TCU- transmission control unit sounds like it has gone bad. More than likely a really lousy coincidence

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t5mmmm

· #3 · Mar 28, 2009

Re: A friends S70 is wonky after a jump start (heavyiron)

Quote, originally posted by heavyiron »

TCU- transmission control unit sounds like it has gone bad. More than likely a really lousy coincidence

... or a voltage spike from the jump ...

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BEJinFbk

· #4 · Mar 28, 2009

Re: A friends S70 is wonky after a jump start (t5mmmm)

Or someone hooking up cables backwards, but not coming clean about it...

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850arrrsaylikepirate

Discussion Starter · #5 · Mar 28, 2009

Re: A friends S70 is wonky after a jump start (BEJinFbk)

Quote, originally posted by BEJinFbk »

Or someone hooking up cables backwards, but not coming clean about it...

I really doubt my friend hooked the cables up wrong, he knows a thing or two about cars. And if he did hook them up wrong he would have told me.

"TCU- transmission control unit" are these things hard to replace / expensive?

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MadeInJapan

· #6 · Mar 28, 2009

eBay

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850arrrsaylikepirate

Discussion Starter · #7 · Mar 28, 2009

Re: (MadeInJapan)

Quote, originally posted by MadeInJapan »

eBay

Thanks, I will look into it.

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850arrrsaylikepirate

Discussion Starter · #8 · Apr 9, 2009

Re: A friends S70 is wonky after a jump start (heavyiron)

Quote, originally posted by heavyiron »

TCU- transmission control unit sounds like it has gone bad. More than likely a really lousy coincidence

Ding Ding we have a winner!

The TCU was toast. Maybe the jump start fried it, or maybe it didn't but something happened which killed it.

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