Can any one tell me if the expansion valve for the ac is a tev or fixed orifice type pleaseRange Rover Westminster 4.4 TDV8 what a car
Discovery 3 HSE 2006 gone but never forgotten
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30th Jun 2019 7:57 pm
MikeMorris
Member Since: 19 Dec 2017
Location: Swindon
Posts: 16
Definitely thermostatic expansion valve.
Theres lots of references in the workshop manual
br Mike[/img]Turning, milling, grinding & welding
Hope u get on ok, alas I’ve got a leak somewhere in mine , have got a new condenser which I’m going to fit then go from there in searching for the leak
Also a link for the parts if it helps , expansion valve JQD500010
Cheers mate I’m just ruling it out before a compressor changeRange Rover Westminster 4.4 TDV8 what a car
Discovery 3 HSE 2006 gone but never forgotten
Member of the 234,567 mile club😎
30th Jun 2019 9:55 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Ur welcome
Ive just seen that ref the compressor and looks a right to get out
My ac system is empty so going to put a few psi in via my small air compressor , has an in-line dryer on it as well then go round everything with soapy water before committing to fitting the condenser
Know I shouldn’t really use air but system is empty anyway , think it’s nitrogen is the proper stuff to find leaks
But once I hopefully find the leak ( replace condenser) will then pull a vacuum and get it regassed properly
Is there any manuals etc u need as I can normally find bits if it helps in any way
Ps, shame ur not closer as we could have done an AC day
Thanks again for the help mate do you know where the valve livesRange Rover Westminster 4.4 TDV8 what a car
Discovery 3 HSE 2006 gone but never forgotten
Member of the 234,567 mile club😎
1st Jul 2019 6:59 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Edit
Last edited by gstuart on 1st Jul 2019 11:50 am. Edited 1 time in total
1st Jul 2019 11:18 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
This is the pic that shows it elsewhere , having a search , hopefully it’s not under the dashboard ???
The expansion is part number JQD500010
1st Jul 2019 11:32 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Yep, looks like the expansion valve is hidden under the upper dashboard but please let me keep digging to ensure that’s 100% accurate
Number 2 is Thermostatic expansion valve
Number 1 is the cabins evaporator
Number 1 is the cabins evaporator
1st Jul 2019 11:40 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
100% is fitted inside the cabin I’m afraid , under the upper dashboard panel
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Plus just thought , assume they tested the pressure sensor to ensure that’s working correctly and sending the correct voltages to ur control panel
Been trying to find a test sheet so u can at least put a multimeter on relevant points to ensure 100% ur compressor is at fault
1st Jul 2019 12:36 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Just starting to find out more info for u
REFRIGERANT PRESSURE SENSOR
The refrigerant pressure sensor provides the ATCM with a pressure input from the high pressure side of the refrigerant system. The refrigerant pressure sensor is located in the refrigerant line between the condenser and the thermostatic expansion valve.
The ATCM supplies a 5 V reference voltage to the refrigerant pressure sensor and receives a return signal voltage, between 0 and 5 V, related to system pressure.
The ATCM uses the signal from the refrigerant pressure sensor to protect the refrigerant system from extremes of pressure and to calculate A/C compressor load on the engine. The ATCM also transmits the A/C compressor load value to the Engine Control Module (ECM), via the medium speed CAN bus, instrument pack and high speed CAN bus, for use in controlling the speed of the engine cooling fan.
1st Jul 2019 12:37 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Some readings which I hope will help for u to compare
This was when my system was first recharged , sensor reads 5 volts , so just thought with ur iid can at least see how they compare
Have u been able to see if the compressors pully spins or not yet
1st Jul 2019 12:44 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
Just found this test sheet with relevant DTC fault codes
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to get out
