Megane MK3 UPC diagram

**jolor** · 21st October, 2018, 12:59 AM

Hi have a big problem with Renault Megane 3 2013 with Start Stop, in upc 284B62069R módule. I swap this módule 3 times and i have same error. DTC 921114, and i ave allwais 15,91 V from batery. I test batery and i have 12,2V and 14,2 V after start. Someone have a diagram from this módule. I need find some broken wire. Thanks.

**jolor** · 21st October, 2018, 11:29 AM

No one can help?

**Louislesinge** · 21st October, 2018, 12:16 PM

Hi,
Here:
Be carefull, there are 2 kinds of UPC, and many kinds of engines. Alternator is 103, of course.

Greetings,

**Pzolee** · 24th October, 2019, 02:28 PM

Originally Posted by jolor

Hi have a big problem with Renault Megane 3 2013 with Start Stop, in upc 284B62069R módule. I swap this módule 3 times and i have same error. DTC 921114, and i ave allwais 15,91 V from batery. I test batery and i have 12,2V and 14,2 V after start. Someone have a diagram from this módule. I need find some broken wire. Thanks.

Hi.

I same problem.
What is the solution friend?
Thanks

**rafal** · 24th October, 2019, 04:49 PM

check wiring of upc

**gomarota** · 22nd March, 2020, 01:55 PM

im having same problem and i found one broken wire from upc to batery disconnection module, now the voltage is fine, but engine light is on dashboard and after som start and stop it says dtc about permanent supply upc, i changed 2 upcs anyone know what can be problem?

**Kompac** · 22nd March, 2020, 10:50 PM

hola, ¿revisaste la caja de desconexión de la batería del fusible f7?

i, ¿comprobó la caja de desconexión de la batería del fusible f7?

**Pascaleiro** · 17th February, 2021, 06:27 PM

I'm having the same problem with a car whose alternator was charging at almost 16V.
Tried two different UPC's and the issue remains, cables seem fine...

**rafal** · 18th February, 2021, 06:53 AM

Originally Posted by Pascaleiro

I'm having the same problem with a car whose alternator was charging at almost 16V.
Tried two different UPC's and the issue remains, cables seem fine...

Looks like voltage regulator bricked

**Pascaleiro** · 18th February, 2021, 09:54 AM

Originally Posted by rafal

Looks like voltage regulator bricked

Client brought two used alternators, didn't solve anything, we ordered a new one and charges fine, but there's always an error.

Autel: DF051
Bosch or Texa: B1211

It's the same error but different codes. All tell something like "UPC voltage supply control unit - open circuit/ground short"

I was trying to access those files from Louislesinge but don't seem to have permission

EDIT:
I can access them now!

**Pascaleiro** · 19th February, 2021, 12:53 PM

Solved the problem!
Diagnostic software read a stuck battery voltage at 15.94V from battery, other values were the usual fluctuating 12V or 14V.
From the diagram I knew it had to be the red BP1C wire, and it had a bad connection behind the headlight, already had been soldered before, and the wire was too stiff, looking as if it was in contact with water.
Thanks!

IMG_20210219_113921.jpg