AKAvant
Veteran Member
- Joined
- Oct 12, 2010
- Location
- Europe
- TDI
- 2004 Audi A4 Avant 1.9TDI Quattro, 2002 VW California, 1998 Jetta TDI (Sold 6/16), 1997 B4 Passat TDI, 1993 Eurovan Weekender 1Z m-TDI conversion (Sold 5/12), 1992 AHU powered B3 Syncro Wagon
I have a TDI Transporter with the 2.5TDI engine that is having a non start issue. In the beginning it was intermittent and a wire was connected from the battery directly to the fuel cutoff solenoid on the fuel pump to use when the van could not be started. In the last 6 months this direct connection from the battery to the N109 cutoff solenoid has had to be used constantly. A bad power drain has also started occurring where the battery will be dead after one night of sitting.
Today I measured the voltage on the original wire at the solenoid and at pin 120 from the ECU and both showed 3.88V. So it doesn't seem like there is a break in the wire.
I recently had pulled the codes which made me think that this wire from the ECU to the solenoid was shorting out.
Address 01: Engine Labels: 074-906-018-ACV.lbl
Part No: 074 906 018 AL
Component: 2,5l R5 EDC 0000SG 3321
Coding: 00002
Shop #: WSC 02743
VCID: 60C46351E0FE47210FB-4B00
2 Faults Found:
17946 - Fuel Shutoff Solenoid (N109)
P1538 - 35-10 - Open or Short to Ground - Intermittent
18039 - Accelerator Position Sensor (G79)
P1631 - 35-00 - Signal too High
Readiness: N/A
So it doesn't seem like there is a short?
The battery was run down and measured 11.7V at the time but this was still enough to get the solenoid to click with the directly connected wire.
So what could be causing the ECU to not be sending enough volts to the solenoid? Could this be something related to the 109 relay (Terminal 30 voltage supply) or perhaps something failing within the fuse box? I have tried 3 different 109 relays (2 new) with no change.
As always any input is appreciated and thanks again!
Today I measured the voltage on the original wire at the solenoid and at pin 120 from the ECU and both showed 3.88V. So it doesn't seem like there is a break in the wire.
I recently had pulled the codes which made me think that this wire from the ECU to the solenoid was shorting out.
Address 01: Engine Labels: 074-906-018-ACV.lbl
Part No: 074 906 018 AL
Component: 2,5l R5 EDC 0000SG 3321
Coding: 00002
Shop #: WSC 02743
VCID: 60C46351E0FE47210FB-4B00
2 Faults Found:
17946 - Fuel Shutoff Solenoid (N109)
P1538 - 35-10 - Open or Short to Ground - Intermittent
18039 - Accelerator Position Sensor (G79)
P1631 - 35-00 - Signal too High
Readiness: N/A
So it doesn't seem like there is a short?
The battery was run down and measured 11.7V at the time but this was still enough to get the solenoid to click with the directly connected wire.
So what could be causing the ECU to not be sending enough volts to the solenoid? Could this be something related to the 109 relay (Terminal 30 voltage supply) or perhaps something failing within the fuse box? I have tried 3 different 109 relays (2 new) with no change.
As always any input is appreciated and thanks again!