I have a 2005 A3 TDI quattro and since I got it there has been a blink from the glow plug warning light every time I start the car ( Comes on, blinks of/on and then stays on for approx the usual time). A local mechanic told me he had a car the same and it was the glow plug wiring harness and that eventually I would have to change it. I ran a recent Vag-com scan due to another fault and got this;
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Address 01: Engine Labels: 03G-906-016-BKD.clb
Part No SW: 03G 906 016 BA HW: 028 101 184 7
Component: R4 2,0L EDC 0000SG 7000
Revision: 12345678 Serial number: AUX7Z0E7FNT01D
Coding: 0000172
Shop #: WSC 06314 000 00000
VCID: 63CE2166A2D91E5DC8-8036
4 Faults Found:
17055 - Cylinder 1 Glow Plug Circuit (Q10)
P0671 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
17056 - Cylinder 2 Glow Plug Circuit (Q11)
P0672 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
17057 - Cylinder 3 Glow Plug Circuit (Q12)
P0673 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
17058 - Cylinder 4 Glow Plug Circuit (Q13)
P0674 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
I notice I no longer have the blink in the light but I have no starting issues and it has been -11 some mornings in the last few weeks, so if I don't get it then, I don't know when I will. So it dies say "Wiring fault", has anyone ever had this or changed the wiring loom due to problems, do my lack of symptoms sound familiar? If I do need to change it, if anyone has any advice as to where to buy one, part number etc I would be grateful. I am thinking it is unlikely all my Glow plugs have given up at the same time. I wonder if it could be a Glow plug control unit issue, kind of implausible signal type thing, although obviously it doesn't say that but certainly a wiring fault within or to and from all 4 plugs sounds most likely to me, although without Vag-com I would be blissfully unaware.
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Address 01: Engine Labels: 03G-906-016-BKD.clb
Part No SW: 03G 906 016 BA HW: 028 101 184 7
Component: R4 2,0L EDC 0000SG 7000
Revision: 12345678 Serial number: AUX7Z0E7FNT01D
Coding: 0000172
Shop #: WSC 06314 000 00000
VCID: 63CE2166A2D91E5DC8-8036
4 Faults Found:
17055 - Cylinder 1 Glow Plug Circuit (Q10)
P0671 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
17056 - Cylinder 2 Glow Plug Circuit (Q11)
P0672 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
17057 - Cylinder 3 Glow Plug Circuit (Q12)
P0673 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
17058 - Cylinder 4 Glow Plug Circuit (Q13)
P0674 - 000 - Electrical Fault
Freeze Frame:
RPM: 882 /min
Torque: 62.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.44 V
Bin. Bits: 11000100
Temperature: 9.0°C
Bin. Bits: 10110000
I notice I no longer have the blink in the light but I have no starting issues and it has been -11 some mornings in the last few weeks, so if I don't get it then, I don't know when I will. So it dies say "Wiring fault", has anyone ever had this or changed the wiring loom due to problems, do my lack of symptoms sound familiar? If I do need to change it, if anyone has any advice as to where to buy one, part number etc I would be grateful. I am thinking it is unlikely all my Glow plugs have given up at the same time. I wonder if it could be a Glow plug control unit issue, kind of implausible signal type thing, although obviously it doesn't say that but certainly a wiring fault within or to and from all 4 plugs sounds most likely to me, although without Vag-com I would be blissfully unaware.