TCM not communicating with PCM

[Left Field]

The DC-DC converter error is interesting.
I'm not sure where it is located but it might be a good thing to check first. Its job is to provide a constant regulated voltage to several of the electronic components, rather than the fluctuating 12V (maybe down to 10V while starting and up to near 15V while charging).

If it is bad it could result in errors from any equipment that depends on getting good voltage.

LF

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[mwilk012]

Why haven’t you changed the auxiliary battery yet?

 

[MarcsM]

The one in the rear end by the trans

 

[mwilk012]

The one in the rear end by the trans

Ah, it’s an Etorque. Makes sense then.

 

[jjvincent]

I'd look into the CANBUS.. A problem there can give you a whole slew of messages and non communication. Many cars are dual CAN, thus one system is high speed and the other is low. Thus you can communicate only with certain items and not others.

 

[MarcsM]

I certainly will look in to it. I appreciate the help. Ty

 

[MarcsM]

after unplugging cleansing of plugs around tranny i got a few more new codes.
u0074
p0013
p0010
u0074
u0594
u1817
p0a94
u0102
u0100
still no start.
shops near me wont look at it until holidays are over.
im not giving up. tomorrow im going to unplug and inspect each plug with errors.

 

[CaJLMetalHead]

questions..

- Have you modified or installed anything before it started behaving this way?

- Did your JL start doing weird things or throwing error messages before it completely failed?

 

[MarcsM]

no mods. its my wires car. all stock.

i read it could be ground strap of the 48V battery , does any one know the location to this ? thanks for the reply

 

[mwilk012]

Most of the faults revolve around your hybrid battery pack. Check for water intrusion into the connector.

 

[mwilk012]

Did you by any chance unplug the VVT actuators? Those are the only two codes that don’t make sense.

 

[jaymz]

Normally I’d tell you to clear all of the codes, go for a drive, the re-check. Many loss of commune codes can be set by a dead/disconnected battery.

I’m not sure that’s the best plan of attack considering that it won’t start.

I would suggest ignoring all but the permanent codes for now. Those cannot be cleared until the vehicle sees that the problem is no longer a problem.

 

[MarcsM]

Most of the faults revolve around your hybrid battery pack. Check for water intrusion into the connector.

do you know the location of the hybird battery pack. I can check them first thing tomorrow morning

 

[four low]

If you have a 2.0T torque, the 48 volt lithium battery pack is on the drivers side, across from the fuel tank. If it was under water, especially salt water, that might cause issues, as I see you are in Fort Myers, Florida.

 

[MarcsM]

If you have a 2.0T torque, the 48 volt lithium battery pack is on the drivers side, across from the fuel tank. If it was under water, especially salt water, that might cause issues, as I see you are in Fort Myers, Florida.

you are 100% correct it was flooded. but was driving fine until last week

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