Technical Service Bulletin
87-24-02 - ID.4 - Cleaning Refrigerant Circuit R1234YF

Transaction No.: 2073537/3

Condition
Applicable Vehicles
Model

Year

Eng. Code

Trans. Code

VIN Range From

VIN Range To

ID.4

2021-2025

All

All

All

All

Revision Table
Instance Number

Published Date

Version Number

Reason For Update

2071473/3

3/24/25

87-24-02

Clarify step 16 by
reinstalling the condenser cap.

2071473/2

12/9/24

87-24-02

Update to labor operation number and
update model year applicability.

2071473/1

4/2/24

87-24-02

Original publication.

Debris can be dispersed throughout the refrigerant circuit after A/C component damage. In order to maintain A/C operating efficiency, it is
important to flush the refrigerant circuit after A/C component repairs.
NOTICE
This bulletin must be read in its entirety before beginning repair.

Technical Background
In cases where an air conditioning system component (such as a compressor or other system component) has failed and debris from the
compressor or component is circulated throughout the refrigerant circuit, the refrigerant circuit must be cleaned of any and all debris or damage
to the replacement components will result.

NOTICE
If the High Voltage system is disabled, the cooling performance test cannot be performed, and separate diagnosis is
required. The High Voltage A/C compressor must have a GFF diagnosis log with completed test plans of all compressor
related faults before replacing the High Voltage A/C compressor.

NOTICE
Any replacement of A/C compressors-regardless of the reason for failure must complete the A/C flush procedure to ensure
the proper amount of oil is re-introduced into the refrigerant system.

Production Solution
No production change required.

Service
Tools

Use an approved R1234yf servicing machine and the
R1234yf Flush Kit RTI360831840 (Figure 1).
Used for effective refrigerant handling and air
conditioning circuit flushing after air conditioning
component failure.

Figure 1. VAS581005 Air Conditioning Service System with Flushing Device.

NOTICE
The VAS 6338/1 Adapter Set for Refrigerant Circuits along with an additional adapter VAS 6338/38 for the expansion valve
bypass this kit, contains the adapters necessary to complete a thorough flush operation of a contaminated circuit. Elsa
contains the technical information for each model regarding the necessary adapter applications and connections of the
servicing station for the flush operation. See Heating, Ventilation & Air Conditioning >> Refrigerant R1234yf-Servicing >>
00 General Technical Data>> Refrigerant Circuit removing contaminates>> Refrigerant Circuit, Flushing with Refrigerant
R1234yf in Elsa

Procedure
To access the expansion valve for removal you must remove the Heating Ventilation Unit.
Refer to ElsaPro/Elsa2Go Heating, Ventilation & Air Conditioning 87 Air Conditioning Front Heater and A/C Unit, R134a/R1234yf Heater and A/C
Unit Air Intake Housing, Removing and Installing.

DANGER
Deactivation of the High Voltage battery is required. Perform the High Voltage battery test plan in Guided Functions.
1. If an air conditioning component has been diagnosed as the root cause of the failure, and this particular component has been verified to have
released debris through the circuit, continue with the flush procedure.
2. Switch the power to the servicing station ON and begin by recovering the refrigerant from the system through the normal service fittings.
NOTICE
For all compressor replacements it is mandatory to flush the system of all oil in the system. The replacement compressor
comes with a full charge of oil for a complete A/C system.

During the entire process avoid interrupting the power to the station. The station’s internal memory will keep a log of all
operations and can conveniently be recalled and printed. If the power is interrupted, the station will lose the memory of the
refrigerant volume recovered.
3. Disconnect the service hoses from the A/C service ports of the refrigerant circuit.
The VAS 6338/1 adapters will be used to bypass the following:
•

Compressor.

•

Expansion Valve.

•

The VAS 6338/80 adaptor will be used to bypass expansion valve 1 -N636 -

NOTICE
The desiccant cartridge must be removed for the flushing process. After the flush procedure is complete replace the
receiver drier or drier cartridge. For ID.4 the front bumper does not need to be removed as stated in the repair manual.

To access the Receiver Drier Cap perform the following steps below to remove the lock carrier.

NOTICE
For reinstallation torque specifications refer to Elsa Pro/Elsa2Go Body>50 Body Front>Lock Carrier>Overview-Lock Carrier.

4. Remove the lock carrier brace.
Remove the front underbody trim panel. Refer to ⇒ Body Exterior;
Rep. Gr.66 [Underbody Trim Panel; Front Underbody Trim Panel,
Removing and Installing].
Remove the bolts -1- from the lock carrier.
Remove the bolts -3-.
Remove the connecting piece -2- downward.
(Figure 2)
NOTICE
Refer to ElsaPro/Elsa2Go - Body > 50 Body Front >
Lock Carrier Brace > Removing and Installing.

Figure 2. Lock carrier brace
5. Remove the impact member.
(Figure 3)
NOTICE
Refer to ElsaPro/Elsa2Go - Body >50 Body Front >
Lock Carrier >Impact member > Removing and
Installing.

Figure 3. Impact member
6. Support the hood using suitable tools and equipment.
Release the coolant reservoir and set it away from the lock
carrier. (Figure 4)

Figure 4. Coolant reservoir set aside.

7. Disconnect the hood release cable and 2 pin hood switch
connector -F266 -. (Figure 5)
NOTICE
Refer to ElsaPro/Elsa2Go – Body >55 Hoods-Lids
>Hood > Release Cable, Removing and Installing.

Figure 5. Disconnect hood switch and hood cable.
8. Disconnect and set aside the washer solvent filler neck.
(Figure 6)

Figure 6. Set aside washer solvent filler neck.
9. Remove the radiator module bracket.
(Figure 7)

Figure 7. Remove radiator module bracket.
10. Perform the following steps below to remove the lock
carrier.
Remove the four bolts under bumper cover.
(Figure 8)
NOTICE
Refer to ElsaPro/Elsa2Go – Body > 50 Body Front
> Lock Carrier, Removing and Installing.

Figure 8. Bolts under bumper cover.
11. Perform the following steps below to remove the lock
carrier. (continued)
Remove the ten bolts from the lock carrier.
(Figure 9)
NOTICE
Refer to ElsaPro/Elsa2Go – Body > 50 Body Front
> Lock Carrier, Removing and Installing.
Figure 9. Bolts retaining lock carrier.

12. Perform the following steps below to remove the lock
carrier. (continued)
(Figure 10)
Pivot out the lock carrier -1- in the direction of -arrow A- under
the tab -9-.
-Remove the lock carrier -1- in the direction of -arrow B-.
NOTICE
Refer to ElsaPro/Elsa2Go – Body > 50 Body Front
> Lock Carrier, Removing and Installing.

Figure 10. Lock carrier removal
13. Release the radiator fan module.
Disconnect the connector for the Radiator Fan -VX57 - -arrow-.
Push in the left and right tabs -1- for the fan shroud in the direction of the arrow A-. (Figure 11)
NOTICE
Refer to ElsaPro/Elsa2Go - Motor 19 Cooling System >
Radiator/Radiator Fan > Fan Shroud with Radiator
Fan, Removing and Installing.

Figure 11. Release the fan module

14. Lay the fan module away from the condenser to access the
condenser carrier trim piece, (Figure 12)

Figure 12.
15. Access the receiver drier cap by gently pulling back the
condenser carrier trim.
(Figure 13)

Figure 13.

16. Remove receiver drier cap, remove receiver drier cartridge and
reinstall receiver drier cap.
(Figure 14)

Figure 14.

17. Remove expansion valve and install flush plate VAS
6338/38. (Figure 15)

Figure 15. Installation of front expansion valve bypass adaptor VAS 6338/38.

18. Remove expansion valve -N636 - and install adaptor VAS 6338/80
(Figure 16)
NOTICE
At this time place the bypass adaptor in the closed position as
shown in Figure 16.

Figure 16. Installation of A/C Line connection block adaptor VAS
6338/80.

19. Remove A/C Recovery machine high side coupler from hose.
Install flush adaptor VAS 6338/48 to high side A/C recovery machine hose.
(Figure 17)
NOTICE
You do not have to remove low side A/C hose coupler. The low side
coupler will be connected to the flush tank filter adaptor.

Figure 17. A/C hose adaptor 6338/44.

20. Disconnect A/C compressor hoses from the compressor.
Install flush adaptor VAS 6338/3 on the high side compressor hose.
Install flush adaptor VAS 6338/12 on low side compressor hose.
Attach high side A/C Recovery machine hose with VAS 6338/48 fitting to low side
compressor hose adaptor VAS 6338/12.
Attach the Yellow recovery tank hose to high side adaptor VAS 6338/3. (Figure
18)
NOTICE

This connection strategy allows for a system flush in the opposite
direction of the normal refrigerant flow.

Figure 18. Installation of VAS 6338/3 and 6338/12.

21. Connect the low side A/C machine coupler to the flush tank filter adaptor.
(Figure 19)

Figure 19.

22. Perform an extended 3 cycle flush.

23. During the 3rd flush cycle move the VAS6338/80 adaptor valve to the open
position. (Figure 20)

Figure 20.

24. After the flush process completes remove any adapters that were installed from the VAS 6338/1.
25. Install a new Expansion Valve and Receiver Drier Cartridge. Reassemble all refrigerant lines.
26. Print the extended flush log of the job and attach to the repair order.
27. Connect the station in the usual manner through the service fittings and perform the normal evacuation and refrigerant recharge operations.

Warranty
NOTICE
The procedure outlined in this Technical Bulletin must be included with the warranty repair(s) and not claimed
independently. You may claim 1/5 of the cost of A/C System Flush filter 0268056100 (See VWHub/Service/Volkswagen
Special Tools and Equipment for current pricing) A print out from the approved R1234yf servicing machine of the flush
procedure must be attached to the warranty claim and provided in Doc It.

To determine if this procedure is covered under Warranty, always refer to the Warranty Policies and Procedures Manual

1)

Model(s)

Year(s)

Eng. Code(s)

Trans. Code(s)

VIN Range From

VIN Range To

ID.4

2021-2025

All

All

All

All

SAGA Coding
Claim Type:

Use applicable Claim Type 1)
HST

Damage Location
(Depends on Service
No.)

Use Service Number of Defective Use damage code appropriate
Component
for root cause of failure

--

Use applicable when
indicated in Elsa (L/R)

Labor Operation 3 ) : Refrigerant drain and fill

8703XXXX = Claim appropriate SRT for vehicle and engine in Elsa

Labor Operation 3) : Air Conditioner Check

8701XXXX = Claim appropriate SRT for vehicle and engine in Elsa

Labor Operation 3) : Air Conditioner Clean

8701XXXX = Claim appropriate SRT for vehicle and engine in Elsa

Labor Operation 3) : Replace Receiver-Drier

87551999 = 120 TU

Labor Operation 3) : Replace Expansion Valve,

87701950 = 20 TU

Labor Operation 3) : Heating Ventilation unit R/I

85151950 = 50 TU

Labor Operation 3) : Cowl Panel Trim R/I

66441900 = See Elsa for latest time units

Labor Operation 3) : Deactivate HV system

93108300 = 30 TU

Labor Operation 3) : R/I N636 Expansion Valve, ID.4

87701952 = 20 TU

Outside Material: R1234yf Flush Kit filter
0268056100

1/5 of the cost of A/C System Flush Filter (See VWHub
/Service/Volkswagen Special Tools and Equipment for current
pricing).

Damage
Code

Service Number:

Diagnostic Time

Parts Manufacturer
(removed part)
Use Vendor code from failed
component
_ _ _2)

4)

GFF Time expenditure

01500000 = 00 TU max.

NO

Road Test

01210002 = 00 TU
01210004 = 00 TU

NO

01320000 = 00 TU max.

NO

Technical Diagnosis

Claim Comment: Input “As per Technical Bulletin 2049039” in comment section of Warranty Claim.
1)

Vehicle may be outside any Warranty in which case this Technical Bulletin is informational only.

2)

Code per warranty vendor code policy.

3)

Labor Time Units (Tus) are subject to change with ELSA updates.

4)

Documentation required per Warranty Policies and Procedures Manual.

Required Parts and Tools
Part
Description

Part No:

Quantity

Receiver-Drier

Vehicle Specific

1

Expansion Valve

Vehicle Specific

1

Tool Description
Air Conditioning Service System

Air Conditioning System Flushing Device Filter

Engine Bung Set

Tool No:
MAHLE R1234yf A/C Service Unit
VAS581005
Or
Robinair R1234yf – ROB1234YFX
Or
MAHLE RTI4608046401
Or
Ecotechnics EEAC830BVW
R1234yf Flush Kit
RTI360831840
R1234yf Air Conditioning Unit – Filter – External Flush
Item: 0268056100

VAS6122

Adapter set for refrigerant circuits

VAS 6338/1

Refrigerant circuit adapter for MAHLE A/C Service Unit and R1234yf Flush
Kit

VAS6338/48

Refrigerant circuit adapter for expansion valve bypass

VAS6338/38

Adapter bypass for A/C compressor line

VAS 6338/3

Adapter bypass for A/C compressor line

VAS 6338/12

Adapter -N636 - expansion valve bypass.

VAS6338/80

Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal. Always check with your Parts Dept. and
Repair Manuals for the latest information.
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