wjw

Tks. Very useful thread!

Chased fault to correded earth wire on loom from speed sensor. Brown and green wire earths on front left of engine below circular mutilplug. Copper wire had correded to dust = no circuit. Removed contact, cleaned cutback to clean wire and soldered. Speedo fault sorted. Thanks to the forum and a 2008 post highlighting this issue. To gain access I removed air inlet manifold to intercooler pipes. Serious amount of crud in inlet manifold doen stream of EGR valve, but with 180k on 1.9tdi no surprise. Anyone got advice on removing maanifold & cleaning? Worth doing for + mpg? WJW

Check condition of wires in door looms where they articulate. Experienced just this issue with near side window and mirror failure chased down to broken wires in drivers door loom and failed offside passenger window due to broken wire in O/S passenegr door loom. The plastic insulation goes hard with age and breaks wires. Check out post on FAQs.

After becoming intermitent the speedo on my Mk1 Aklhambra 1999 1.9TDi 110hp has stopped working. Error code 00625 Implausable signal. I have read a number of posts on here regarding the VSS which I have removed. Looks sound and wiring looks good. Can you test the VSS or is a faulty unit identifeid by substitution with known good one?

Will wire up and see.

I am trying to sort a non-functioning aux heater on a 99 T plate MK1 Alhambra. Have checked glowplug for resistance having repalced in 2 years ago. Checked oout OK. Have checked operation of temp switch, OK and wired out with mini fuse. Am getting 12v to aux heater mutiplug so dont suspect fuse. HAve checked all fuses anyway. Late 99 models list a erlay on wireing diagrames hece request. Haven't checked aux heater fuel line / pump or heater fab. Any advie gratefully received!

Any one got a list or point me to a link that details which relay does what? This is another limit of good old Hayens!

What resitance / voltage reading would would you expect from a MK 1 Aux Heater air temp sensor?

Thanks for the heads up.

Aux heater is not firing on Mk1 Alhambra. Have tried VAG-com lite for error codes but will not connect to aux heater module. Is the MK1 wired for reading? Last renewed glowplug 2 to 3 years ago so may have gone again. Any input on module readability greatfully received.

Not true, BK! The glowplug light comes on for only a second or so if ambient temperature is greater than about 6 deg C (gestimate) or the engine is at least luke warm. However below this the light stays on longer and longer. At -1 deg C and stone cold engine I reckon it would be on for about 4 - 5 secs. At -20 deg C it stays on at least 10 seconds. That is my experience anyway. It appears to be controlled by combination of external air temp sensor, engine coolant sensor (this is a multiple sensor device) and ECU analysis of very recent engine activity. Tks, Have checked out various components and with the coolant temp guage disconnected glow plugs durration can be managed manually and engine starts on the button. ( 3

I am experiencing sluggish starting on 1.9Tdi 110bhp Mk1 T plate. The duration of the glow plug light on dash is very short - even when ambient is -1