87 Technical Air conditioning Service Bulletin inoperative Transaction Release date: No.: Apr 2020124/2 Condition 23, 2010 REVISION Revision Date HISTORY 2 - Purpose Revised 1 2/27/2009 Original publication Technical Background, Production Solution, and Service Air The conditioning HVAC blower is inoperative. Technical Background functions normally. The to low show A/C Pressure/Temperature incorrect or implausible Sensor value G395 when leaks reading refrigerant. MVBs. An This incorrect causes signal Sensor or G395 deactivate. refrigerant level in the system can cause the air conditioning compressor to a type The pinched LIN or cable cut. connecting This affects the the J519 A4, A5, Central and Electrics S5 vehicles. Control The unit A6 is to not Sensor affected G395 by is Tip: of Sensor failure. G395 is a LIN slave of Vehicle Electrical System Control Module J519. this Production Vehicle sensor via Electrical Solution the comfort System data Control bus to Module Climate J519 Control transfers Module the J255. information provided by the An Service improved A/C Pressure/Temperature Sensor G395 was introduced into series production. If check For DTCs A6, the A4 are system (8K), stored A5/S5 pressures in the (8T): J255 and Climate refrigerant Control volume. Module for the G395 pressure sensor, then
If a system leak is found, pressures then and replace refrigerant the G395. volume are low, check for refrigerant leaks at G395. If Tip: If an the implausible Install system only the pressure improved and value refrigerant G395. is found See volume in part MVB numbers are 1, field correct, in 4, Required then perform replace Parts guided G395. and fault Tools. finding. If 1. Only Check for A4 for (8K), these A5/S5 three (8T): DTC Control (Vehicle Module Electrical J255, DTC address codes: System 08. Control Module J519- Please check DTC memory) in Climate DTC address (A/C 08. Pressure/temperature Sensor G395- Incorrect Signal) in Climate Control Module J255, System DTC (A/C Control Pressure/temperature Module J519, address Sensor 09. G395- No signal/communication) in Vehicle Electrical Perform Pressure Tip: The steps Sensor LIN 2-6 cable could only connecting if be all pinched three the DTCs or J519 cut are if Vehicle all stored. of the Electrical codes are System stored. Control module to the G395 2. according Check the to LIN guided cable fault connecting finding. the J519 Central Electrics Control unit to the G395 pressure sensor 3. corrosion, Check the and wire for terminals any pins that the connector may be pushed at the back G395 or pressure widened. sensor for proper attachment, possible 4. Check intermittently to make open sure (wiggle there is test). proper voltage going to the sensor and verify the ground is not
5. Check integrity wire the There harness. are of two the known in harness the wiring sections can affected, be that the potentially areas but are to known these not limited sections. two of the known is One the footwell driver s area in where harness interior the enters wire the car engine from bay of (Figure 1). Figure 1. Wire harness in driver footwell area.
The known is second harness in the section located under wire the side (Figure driver s headlight 2). 6. If a cut is found, Figure then 2. install Wire harness an overlay under wire driver s for the side LIN headlight. existing wire harness. bus signal. Do not attempt to repair the a. Route new bus wire LIN the that the interior it enters so of vehicle through the driver s fender/lower side the A-pillar through grommet area the Figure 3. Grommet in driver s side fender/lower A-pillar area used for pass-through for
indicated Figures and 4. 3 in new overlay wire. not the Tip: route wire Do through same opening the used existing harness. by wire the b. Seal opening around off the the wire Butyl sealant with prevent water to intrusion. Warranty Figure 4. Seal off access hole in grommet with Butyl sealant. Claim Type: Service Use applicable Bulletin claim is informational type. If vehicle only. is outside any warranty, this Technical Service Number: 8709 Damage 0010
Code: Labor Operations: Use specified applicable in ElsaWeb. labor operations appropriate for the necessary repair as Diagnostic Time: GFF 01500000 protocol Time stated on diagnostic Road procedure test prior to service No allowance TU Road procedure test after service No allowance 0 TU details) Technical (Refer to Section diagnosis 2.2.1.2 at dealer s and Audi discretion Warranty Online for DADP allowance All Claim Comment: warranty claims As submitted per TSB #2020124/2 Policies Required and Parts Procedures and Tools Manual. for payment Claims are must subject be in to accordance review audit with the by Audi Warranty. Part 8K0 959 Number 126B Part Pressure Description sensor A4, A5, S5 Quantity -or- 4F0 Additional 959126C Information Pressure sensor - A6 1 Always All parts check and service with your references Parts Department provided in and this service TSB are manuals subject for to the change latest and/or information. removal.
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