How Do I Remove This?

[Ogben Schmutzel]

Further to the directions by GSMGuy in this post (Page 3)

 

http://www.fordgalaxy.org.uk/ford/index.ph...wtopic=3623&hl=

 

on how to test the aux heater sensor, I have discovered that I do not have the required nimble fingers to get at the sensor, or in fact the confidence to know that what I can see under there is in fact the sensor.

 

To get at it better after removing the wiper arm I tried to remove the bit of trim indicated in the attached but could not get the studs unclipped with the force that I was prepared to exert. I have horror thoughts of breaking the trim and finding the sensor is fine!!! You can see that through my effort the trim is still lifted slightly and won

[Ogben Schmutzel]

Bear with me - I can't get the image to upload!!

[Jeff115]

Oggie,

Host the image on

http://imageshack.us/index.php

 

then link to it to display

[Ogben Schmutzel]

I can't upload it!

 

Its a 72KB JPEG, any suggestions please?

[Ogben Schmutzel]

Thanks Jeff115 - you are a god ;)

 

Try this!

 

http://img183.exs.cx/img183/6293/dscf3980b8kz.jpg

[Jeff115]

Oggie,

Remove the trim above the coolant expansion bottle (YELLOW) to get at the wiper mechanism - 3* 10mil bolts, from memory. Pull the trim to the right (Drivers side) to get past the coolant expansion bottle.

 

You'll need to take the rubber seal off first (RED) - just pull upwards.

 

Ambient temp sensor is on the NS wiper fixed arm roughly in line with the battery - just follow the cabling to it.

 

J.

http://img112.exs.cx/img112/8056/oggiestempsensor8uq.jpg

[Ogben Schmutzel]

Jeff115,

 

Many thanks.

 

Hopefully I will be able to see what is lifting the bit of trim that, in ignorance, I was trying to remove!!

 

Regards.

Oggy.

[Ogben Schmutzel]

Having read the other Aux Heater thread top to bottom, do I take that all my efforts to identify and resolve my Aux Heater fault will be in vain if I don

[GSMGuy]

Ogben, if there have been 5 or more failed attempts at ignition, the fault will be stored and further attempts at ignition prevented as a safety precaution... In this case it will need clearing..

 

However, I think if the temp sensor is faulty, it will just not be giving the heater the instruction to fire, so therefore, I don't think it will have logged a fault and not need resetting B)

 

Mike

[tim-spam]

I think I read somewhere that the fault code memory clears if the battery is disconnected for a period of time, and that there is a calibration sequence to be followed when the battery is re-connected. If this is true, I guess that once a fault is fixed, the fault codes can be cleared with no need for VAGCOM.

However, I'm still going to buy the lead and get the software for its diagnostic functions - resetting fault codes will also be much quicker than disconnecting / re-connecting the battery.

Tim

[GSMGuy]

SOrry, it doesn't clear the fault codes if you disconnect the battery..

 

Mike

[Jeff115]

Oggie,

I don't see a VAG 1551 / VAG-COM fault code for the ambient temperature sensor although there is one listed for the coolant temperature sensor and the vehicle voltages which are also part of the aux/additional/booster water heater start sequence.

 

IMO this backs up what GSMguy says above

However, I think if the temp sensor is faulty, it will just not be giving the heater the instruction to fire, so therefore, I don't think it will have logged a fault and not need resetting

 

Having said that IMO I don't think your inop. heater is being caused by lack of/wrong signal from ambient temperature sensor. You can also check this (plus the circuit) in situ by measuring the voltage across the terminals of the multi-plug at the heater.

 

If the flat side of the multi-plug is on your left with the rounded side on your right then check the voltage with a multimeter between the terminals at 10 o'clock and 2 o'clock.

If ambient temp < 5 degrees then + 12v

else if ambient temp > 5 degrees then 0 v

 

You could assist the temp down < 5 degrees using a burn spray on the sensor B)

 

If sensor is suss then bypass as MM said previously otw replace.

 

 

Regards,

Jeff.