First I would check the relay, and then its wiring.

 

Any ideas where the relay is? I can't find it in Bentley's, or my factory CD


BTW, I checked the TCM, its bone dry with no evidence of ever being wet.

Little bonus, I found about $20 worth of change in the passenger well under the carpet!

 

bumpety bump

 

I don't know where the relay is, but Bentley says F31 is for A/T, check F31 and if OK, follow the wires from it,
one probably goes to the Transmission Solenoid Power Relay.
Hope this helps.

 

I wonder if that relay is in the same box as the ECU relay -- driver's side firewall, near the brake master cylinder.

 

ok i'll check there, thx guys

 

Hi have you found the cause of the problem ? my passat has just thrown this code and is randomly going into limp mode as well

 

I haven't found a Transmission Solenoid Power Relay, and doubt there is one, could depend on year and engine. Check F31 and check its socket and wiring for bad connection.
stig786, what are the details of your car and engine ?

 

It's a 2004 B5.5 - 1.8T with 42000km on the clock

Engine Code AWT

Transmission Code FEV

Right now its parked up as all the gears are lit up on the display.

The TCM is dry no water ingress have no idea what's going on.

 

I'm pretty sure the "Transmission Solenoid Power Relay" doesn't exist in these cars, it's not listed in any diagram that I have seen.
The problem is likely to be low or no voltage supplied to one of the TCM inputs. Check F31/15A & F15/10A fuses for battery voltage on both sides, with fuses installed and ign. on.
Check that the fuses make good contact in the holders and the wires at the back of the fuse holders are making good contact.

With ign. on, you need to have battery voltage at T68a/23 & T68a/45 on the TCM, and T7/7 on the Multi Function Switch.

 

I'm pretty sure the "Transmission Solenoid Power Relay" doesn't exist in these cars, it's not listed in any diagram that I have seen.
The problem is likely to be low or no voltage supplied to one of the TCM inputs. Check F31/15A & F15/10A fuses for battery voltage on both sides, with fuses installed and ign. on.
Check that the fuses make good contact in the holders and the wires at the back of the fuse holders are making good contact.
With ign. on, you need to have battery voltage at T68a/23 & T68a/45 on the TCM, and T7/7 on the Multi Function Switch.

Thanks man will check this out either tomorrow or next week at the mechanics
will update after I try it

 

oops.. wrong thread. please remove this

 

Haven't gotten a chance to test yet but I've been doing some reading and is it possible it could be a ground issue

searching for grounds for the wiring harness I'm guessing it would be in the interior under the carpet ?

 

A late update I ended up replacing the TCU and this solved the problem but it occasionally still goes into limp mode after a long drive if i put the car in reverse scanned it and getting a error code for the multifunction switch but having some trouble finding the correct switch

 

The multi-function switch is mounted on the side of the transmission, and contains a number of micro-switches operates by cams.

 

Geç bir güncelleme sonunda TCU'yu değiştirdim ve bu sorunu çözdü, ancak arabayı geri vitese takarsam ve çok işlevli anahtar için bir hata kodu alıyorum, ancak bulmakta biraz sorun yaşıyorsam, uzun bir sürüşten sonra ara sıra hala gevşek moda giriyor. doğru anahtar [/ALINTI] Merhaba aynı sorunu yaşıyorum.Bana yardımcı olur musunuz?

 

Merhaba @stig786 sizin ile aynı hata kodu var.Yardimci olurmusunuz ??

 

Hata bu şekilde

 

??

 

LÜTFEN yardım

 

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