Figure 14. Location and connection of the
adaptors for the rear unit A/C lines
Note:
Later models may have a dowel pin in the high
pressure refrigerant line that does not allow the VAS
6338/60 to be installed. The pin must be temporarily
removed to install the VAS 6338/60. . DO NOT cut
the pin flush with the refrigerant. Side cutters can be
used to remove the pin and pliers to reinstall the pin
(Figure 15 and 16).

Figure 15. Removal of dowel pin.

Page 12 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Figure 16. Installation of rear refrigerant line dowel
pin.

25. Connect the VAS 6338/48 to adaptor VAS
6338/60
26. Connect flush tank hose (Yellow) to the high
side compressor hose adaptor VAS 6338/3. (Figure
17)
Note:
Reverse flushing not required for rear A/C unit
cleaning.

Page 13 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Figure 17. Attaching service station and flush
hoses to rear A/C lines.

27. Perform an extended 3 cycle flush on the rear A/C unit.
Note:
Do not use the short flush option in the ACX1281 service menu. This is for clearing the ACX1281
machine hoses only and does not flush the vehicle refrigerant system.
28. When complete, remove any adapters that were installed from the VAS 6338/1.
29. Install a new rear Expansion Valve and reinstall all the refrigerant lines.
30. Connect the station in the usual manner through the service fittings and perform the normal
evacuation and refrigerant recharge operations.
31. Print the extended flush log of the job and attach to the repair order.
32. Connect the station in the usual manner through the service fittings and perform the normal
evacuation and refrigerant recharge operations
A/C Components Replacement
The following components must be replaced:
 Expansion Valve
 Rear Expansion Valve (If equipped)
 Receiver-drier/cartridge

Page 14 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Warranty
Note:
The procedure outlined in this Technical Bulletin must be included with the warranty repair(s) and not
claimed independently.
You may claim $8.50 per A/C System flush for the A/C System Flush filter 0268056100 (which represents
1/5 the cost of a replacement filter)
A print out from the approved R1234yf servicing machine of the flush procedure must be attached to the
warranty claim.
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

All Models

2018-2022

All

All

All

All

SAGA Coding
Claim Type:

Service Number:

Use Service Number
of Defective
Component

Use applicable Claim Type 1)
Damage
Code
Use damage
code appropriate
for root cause of
failure

Labor Operation 3) : Refrigerant drain and fill

HST

Damage
Location
(Depends on
Service No.)

--

Use applicable
when indicated in
Elsa (L/R)

Parts Manufacturer
(removed part)

Use Vendor code from failed
component
_ _ _2)

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

(Except Atlas)
Labor Operation 3): Air Conditioner Check, All
Vehicles. (Except Atlas)

87010150 = See Elsa for the latest time units

Labor Operation 3): Air Conditioner Clean, All
Vehicles, Front A/C only (except Atlas)

87012999 = 110 TU

Labor Operation 3): Replace Receiver-Drier
(Except Atlas)

8755XXXX = Claim appropriate SRT for vehicle and
engine in Elsa
Page 15 of 20

© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Labor Operation 3): Replace Expansion Valve, 8770XXXX = Claim appropriate SRT for vehicle and
if equipped. (Except Atlas)
engine in Elsa
Atlas with Rear A/C unit.
Labor Operation 3) : Refrigerant drain and fill

87031700 = See Elsa for the latest time units

Labor Operation 3): Air Conditioner Check

87010150 = See Elsa for the latest time units

Labor Operation 3): Air Conditioner Clean

87013099 = 300 TU

Labor Operation 3): Replace Receiver-Drier

87555550 = See Elsa for the latest time units

Labor Operation 3): Front grille remove and
reinstall.

66051999 = 20 TU

Labor Operation 3): Replace Expansion Valve

87701950 = See Elsa for the latest time units

Labor Operation 3): Replace Rear Expansion
Valve

88701900 = See Elsa for the latest time units

All Vehicles
Outside Material: R1234yf Flush Kit filter
0268056100

8.50 total per A/C System Flush which accompanies a
repair (this amount equals 1/5 of the cost of the A/C
flush machine filter)
Diagnostic Time 4)

GFF Time expenditure

01500000 = 00 TU max.

Road Test

01210002 = 00 TU
01210004 = 00 TU

Technical Diagnosis

01320000 = 00 TU max.

NO
NO
NO

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.

Page 16 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Required Parts and Tools
Part Description

Part No:

Quantity

Receiver-Drier

Vehicle Specific

1

Expansion Valve

Vehicle Specific

1

Rear Expansion Valve (Atlas only)

3QF820712A

1

Self-locking bolt

WHT000729A

3

Rivet (if unable to be re-used)

N03854994

1

Clamping Washer

N90335004 with WHT003386

1

Tool Description

Tool No:

Air Conditioning Service System

MAHLE R1234yf A/C Service Unit
VAS581005
Or
Robinair R1234yf - ROB1234YFX

R1234yf Flush Kit
RTI360831840
Air Conditioning System Flushing Device Filter

R1234yf Air Conditioning Unit - Filter - External
Flush
Item: 0268056100

Page 17 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

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

Refrigerant circuit adapter for expansion valve
bypass

VAS 6338/18

Page 18 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Adapter bypass for A/C compressor line

VAS 6338/3

Adapter bypass for A/C compressor line

VAS 6338/12

Additional adapter bypass for Atlas rear A/C unit
high side rear line.

VAS 6338/60

Additional adapter for Atlas rear A/C line block off.

VAS6338/63

Page 19 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

87-18-08 - Air Conditioning, Cleaning of the R1234yf Refrigerant
Circuit (U.S. Only)

Transaction
No:

2049039/11

Release date:

7/28/2021

Additional adapter bypass for Atlas rear A/C unit
low side rear line.

VAS 6338/3

Additional adapter for Atlas rear A.C line block off.

VAS6338/5

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.

Page 20 of 20
© 2021 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.