Passat VR6 automatic transmission

Hello, I'm having a problem with a customer. The error code is: Control unit part number: 096 927 731 BF.
Component and/or version: AG4 transmission, part number 096 1521.
Encoding: 00000
Workshop code: WSC 00000.
'One error found:'
00545 - Electric connection for motor/transmission.
31-10 - Interruption / Short circuit to ground.

It's a Passat with a VR6 engine and an automatic transmission.

What should I search for to find the cable where the break is located?

I have another error in this fuel injection control unit; the error code is: Control unit part number: 021 906 258 CG.
Component and/or version: MOTOR PMC 2.
Encoding: 0261203211
Workshop code: 1267358111
1 error code found.
00545 - Electric connection for motor/transmission.
29-10 - Short circuit to ground.

'When the engine is running, they are constant, but when I only turn on the ignition, they appear intermittently.'

I have the feeling that the engine control unit is in a fault mode and that it's engaging in third gear. When I'm driving at 120 km/h and press the kickdown, it doesn't downshift. The kickdown switch seems to be working fine; I've already checked it.

ei, hold the connection between the transmission control unit and the engine control unit...

Does the Passat also have a specific name (or production year), and what are its engine code (MKB) and transmission code (GKB)?
You need to provide some information.


CU Gremlin.