I Got 3 DTC codes this morning after doing a flash on a 2008 MR the codes are U0100,P1870 and P1871 now once the key is on the fan runs constant the car wont start does anyone know the fix or what needs to be done
Thanks in advance all replys welcome

 

The p codes correspond to a tranny/transfer case code. Iirc, the u0100 is a generic code set to indicate that its ecu has been flashed at some point.

 

As i said above the car wont start

Thanks

 

did you flash back the same rom id

 

yes i did and it just locked up

 

What kind of no start. Cranks but won't start of does it just not crank at all?\

This happened to me once and I almost Crapped my self, I left the ignition on too long and it was cold outside, the battery Voltage went to low and the Rom didn't flash to the ecu correctly. When I went to start the car it wouldn't crank. So I charged the battery and tried again it cranked but wouldn't start, It would fire for just a second then cut. So I re flashed it and it worked again. Only it took longer and I was freaking out because I had just started playing with Ecus.

 

cranks but wont start and once the ecu is on the fan runs constantly

 

Sounds like the Immobilizer, check that you used your code on the new rom. I would start with that first

 

Once the ign is on the fan runs constant codes cant be cleared no matter what even after disconnecting the ecu or battery with the ecu unpluged the codes are still there
thanks

 

New Thought Check the fuses (trust me, it sounds basic but do it)

If You want I can give some quicker form of contacting me and I can help you tech down the problem (its what I do for a living).

Here is what the codes mean

U0100 Lost Communication With ECM/PCM "A"
P1870 Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit Failure
P1871 Transmission Mechanical Transfer Case 4x4 Switch Circuit Short To Battery

U0100 is a univeral SAE code. The other two are mitsu definitions.
P1870 and P1871 Mean that according to the computer theres a problem with the differential button, or the wires. You can check this but using the knowledge that you have flashed your computer right before these problems occured i would strongly suggest reflashing the ECu back to the Last working rom you had on it and seeing if the rom is the problem or its something else.

 

it cannot be flashed it will not allow it nothing happens its like the whole ecu/bcm/canbus system is locked up

 

Were you able to check the fuses?

 

they are all good

 

whats the battery voltage

possibly you bricked your ECU Refer to this thread

https://www.evolutionm.net/forums/ec...-ecuflash.html

 

[QUOTE = tuning g; 7939271] Eu tenho 3 códigos DTC esta manhã depois de fazer um flash em um MR de 2008 os códigos são U0100, P1870 e P1871 agora, uma vez que a chave está no ventilador, o carro não liga. ou o que precisa ser feito
Agradecemos antecipadamente todas as respostas bem-vindas [/ QUOTE]
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