Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

What makes them think the contactor relays are bad?

You can simply power them with 12V to test them. You can do that without taking them out of the pack.

NEVER heard of one going bad. Same parts as Prius.

Third relay is Pre-Charge. If it's bad you won't go either.

These guys are going fishing on your dime.

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

You are right. I called dealer told them to chack it with 12V. They are very upset.

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

918$ for reset, what a rob

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

Did they make it run for that?

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

That won't be the first dealer service department that took ME off the Christmasl List.:shade:

Where is this at? What dealer?

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

Did you ever fixed Code U1888?

Engine does not start and has Service hybrid system message. Scangauge II gives code.
P0AC4 -????
C1233 ABC SYSTEM
U1888 HCM LOST COMMO WITH ESCM

I stuck. don't know what i do. :)

Advice please.[/QUOTE]

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

PoAC4 = Check Engine Light. So now you need to find out what has the hybrid computer mad.

U1888 can be a bad wire or connection somewhere in the Controller Area Network CAN communication wires. Are there some unplugged wires anywhere? Something that got moved and maybe chaffed a wire?

Still under warranty? There is a very long GM service bulletin on that code.

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

Havent checked that well, the pickup is in a parking lot.
i just had time to pull the codfes, and i got U1888 and P0AC4
This CAN wires go beneath the Chassis? or below the car carpet?

U1888 can be a bad wire or connection somewhere in the Controller Area Network CAN communication wires. Are there some unplugged wires anywhere? Something that got moved and maybe chaffed a wire?

Still under warranty? There is a very long GM service bulletin on that code.[/QUOTE]

Re: Hybrid silverado 2009 wont start after collision, HVCID crash sensor code?
 

Could code U1888 be triggered by a dead 12v battery?