Author Topic: Tiguan 2014 schematics?  (Read 695 times)

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Offline portmanteau

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Tiguan 2014 schematics?
« on: December 13, 2016, 11:07:49 pm »
I have reason to want to check the in-tank lift pump on my 2014 Tiguan CR 2.0 TDI

The pump/sender module is quite unusual in that it has 2 electrical plugs on top (usually only one) and the pump inside has 4 wires going to it instead of the usual common garden variety positive and negative.

I have the latest downloads from ERWIN for Tiguan, and nothing there seems to cover this arrangement

As much for curiosity as for anything else, would anyone have access to the wiring diagram for this new setup please?  I'm keen to know what magic is inside the pump (motor) that needs 4 wires?

Pump module is the same as as the one at this link:

http://www.ebay.co.uk/itm/AUDI-Q3-Fuel-Pump-Sender-Unit-8U-2-0-TDI-DIESEL-QUATTRO-5N0919088J-2012-/381706275520
« Last Edit: December 13, 2016, 11:10:47 pm by portmanteau »
'94 S2 Avant N300 Nothelle, '94 S2 Sedan '84 urq,'80 Golf GTI replica, '83 Rocco GTI, '99 TT, '07 Q7, '99 S4 Avant, '86 90Q, '63 DKW Junior, other non-VAG collectibles, & 2 lonely 200Q

Offline portmanteau

  • S2 Avant N300 Nothelle
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Re: Tiguan 2014 schematics?
« Reply #1 on: December 13, 2016, 11:36:50 pm »
you can all relax - I think I have it sussed

the pump has been improved to eliminate the intermediate boost pump that used to sit between the lift pump and HPFP on the earlier CR TDI

it's now referred to as the "GX1 fuel delivery unit":

http://www.asealliance.org/wp-content/uploads/2016/05/3.0L-V6-TDI-Engine.pdf


 Fuel Delivery Unit GX1
The Fuel Delivery Unit GX1 basically consists of two sections:
The fuel level sender that uses 3-conductor technology and detects the fuel level in the fuel tank.
The fuel system pressurization pump G6 that uses an EC motor. The EC motor is a brushless, permanently
activated synchronous motor.
Thanks to its brushless design, the motor is wear-free except for the bearings. The Transfer Fuel Pump G6 is
activated by the Fuel Pump Control Module J538. A PWM signal is used for activation by the Engine Control
Module J623. Error feedback messages are sent via the same wires.
This provides a demand-regulated supply of fuel.


Not as simple anymore as hanging 12 volts on to test - more complexity *sigh*

« Last Edit: December 13, 2016, 11:38:37 pm by portmanteau »
'94 S2 Avant N300 Nothelle, '94 S2 Sedan '84 urq,'80 Golf GTI replica, '83 Rocco GTI, '99 TT, '07 Q7, '99 S4 Avant, '86 90Q, '63 DKW Junior, other non-VAG collectibles, & 2 lonely 200Q