Temp gauge and short ground

[m_zafar]

Hi All

I have had a short to ground error showing on vag com for a couple of months and now my temp gauge doesnt move at all. The fan comes on however the needle doesnt move. Getting concerned as summer is approaching. vag com log:

17633 - Fuel Injector for Cylinder 1 (N30): Short to Ground
P1225 - 35-10 - - - Intermittent
17635 - Fuel Injector for Cylinder 3 (N32): Short to Ground
P1227 - 35-10 - - - Intermittent
17636 - Fuel Injector for Cylinder 4 (N33): Short to Ground
P1228 - 35-10 - - - Intermittent
17634 - Fuel Injector for Cylinder 2 (N31): Short to Ground
P1226 - 35-10 - - - Intermittent
17833 - EVAP Purge Valve (N80): Short to Ground
P1425 - 35-10 - - - Intermittent
17955 - Boost Pressure Regulation Valve (N75): Short to Ground
P1547 - 35-10 - - - Intermittent
17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2: Short to Ground
P1117 - 35-10 - - - Intermittent
17843 - Secondary Air Pump Relay (J299): Short to Ground
P1435 - 35-10 - - - Intermittent
17938 - Camshshaft Timing Adjustment: Short to Ground
P1530 - 35-10 - - - Intermittent
17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground
P1421 - 35-10 - - - Intermittent
17697 - Boost Pressure Control Valve (N249): Short to Ground
P1289 - 35-10 - - - Intermittent
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 35-00 - -
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -

 

[longman]

Sounds like you have a few wiring issues.

Sometimes short to ground can mean that just the effected sensor or valve needs replacing but as you have so many components with the same issue, I would be inclined to check the circuitry.

I don't suppose you have got the engine bay wet lately have you?

 

[m_zafar]

engine bay not wet. whats the best way to test the circuitory

 

[longman]

I would be inclined to check the condition of the plugs and connectors and clean the terminals. Perhaps a bit of WD40 for good measure.

Then check the condition of all the relevant wires, make sure there are no nicks or breaks in the sleeving.

It just seems like there are a lot of components with the same issue. This would tell me that there is one main source, shorting to earth and its effecting all of these components??

 

[m_zafar]

which terminals are you refering too? I have changed the fuel pump relay too

 

[longman]

You will need to have a look at a wiring diagram to see how all these valves and sensors are linked.

The fact that so many parts are short to ground and its not wet, shows that there is a common connection, fuse, relay or switch that is short.

Once you have found the common connection, clean the terminals, replace any relays or switches and see if that helps.

 

[m_zafar]

how do i get hold of a wiring diagram mate? done some research and the common relay is the fuel relay that i have changed.

 

[longman]

Oh right, thats annoying!! So have you cleard the codes and they have come straight back have they??

I think, if you sign up to https://erwin.seat.com/erwin/showHome.do

You view wiring diagrams although it does cost.... Or you can order a Ross Tech Bentley CD which has this info for the whole VAG range.