A872474202012414
Service Bulletin Details
Public Details for: A872474202012414
This bulletin provides information when the air conditioning is no longer operative; dtc 00457, 00256, 01592.
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Technical Service Bulletin 87 Air conditioning inoperative; DTC 00457, 00256, 01592 87 24 74 2020124/14 April 29, 2024. Supersedes Technical Service Bulletin Group 87 number 15-69 dated August 24, 2015 for reasons listed below. Model(s) Year A6 2007 - 2014 A6 Avant 2007 - 2011 VIN Range Vehicle-Specific Equipment All Not Applicable 2007 - 2011 S6 2013 - 2014 A5, and S5 2008 - 2014 2008 - 2013 R8 2014 A4, A4 Avant, and Q5 2009 - 2014 S4, A5 cabriolet, S5 Cabriolet 2010 - 2014 A8 2011 - 2014 R8 Spyder 2011 - 2012 2014 R8 GT, and R8 GT Spyder 2012 A7 2012 - 2014 RS 5, RS 5 Cabriolet, S7, Q5 2013 - 2014 Hybrid, and SQ5 Condition REVISION HISTORY Revision Date Purpose 14 - Revised header (Corrected model codes and model years). Revised Warranty (Changed damage code, corrected labor operations) Revised Required Parts and Tools (Update sensor part number) 13 08/24/2015 © 2024 Audi of America, Inc. Internal Revised Required Parts and Tools (Added sensor seal) Page 1 of 8 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 Audi 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 12 4/25/2014 Revised Warranty (Changed damage code, corrected labor operations) • Air conditioning is inoperative. • The HVAC blower functions normally. • Battery discharged; however, when charged, there is no bus silence when vehicle ignition is off. Technical Background • The A/C pressure/temperature sensor, G395, leaks refrigerant. This causes sensor G395 to show an incorrect or implausible value when reading MVBs. An incorrect signal or a low refrigerant level in the system can cause the air conditioning compressor to deactivate. • The LIN cable connecting the vehicle electrical system control module, J519, to sensor G395 is pinched or cut. This affects the A4/S4, A5/S5 Coupe and Cabriolet, and Q5 vehicles. The A6 and A8 are not affected by this type of failure. • The pressure sensor G395/G65 sends an incorrect signal that prevents bus silence, and the battery is discharged. Tip: Sensor G395 is a LIN slave of the vehicle electrical system control module. The vehicle electrical system control module transfers the information provided by the sensor via the comfort data bus to the climate control module, J255. Production Solution An improved sensor G395 was introduced into series production and the wiring manufacturer’s processes were optimized. Service For A4/S4 (8K), A5/S5 Coupe/Cabriolet (8T/8F), Q5, A6, A7, R8: If DTCs for sensor G395 are stored in the climate control module, J255, then check the system pressures and refrigerant volume. • If system pressures and refrigerant volume are low, check for refrigerant leaks at sensor G395. If a leak is found, then replace sensor G395. • If the system pressure and refrigerant volume are correct, perform guided fault finding (GFF). If an implausible pressure value is found in MVB 1, field 4, then replace sensor G395. Tip: Install only the improved G395. See part numbers in Required Parts and Tools. © 2024 Audi of America, Inc. Internal Page 2 of 8 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 Audi 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 Only for A4/S4 (8K), A5/S5 Coupe/Cabriolet (8T/8F), Q5: 1. Check the diagnostic fault memory for two possible DTC scenarios: DTC Scenario 1 08 - Climate Control Module - J255: DTC 00457 - Vehicle Electrical System Control Module – J519- Please check DTC memory DTC 00256 - A/C Pressure/temperature Sensor –G395- Incorrect Signal -AND09 - Vehicle Electrical System Control Module – J519: DTC 00256 - A/C Pressure/temperature Sensor –G395- No signal/communication DTC Scenario 2 08 - Climate Control Module - J255: DTC 00457 - Vehicle Electrical System Control Module – J519- Please check DTC memory DTC 00256 - A/C Pressure/temperature Sensor –G395- Incorrect Signal -AND09 - Vehicle Electrical System Control Module – J519: DTC 01592 - Air Quality Sensor –G238- No signal/communication DTC 00256 - A/C Pressure/temperature Sensor –G395- No signal/communication If scenario 1 is the case, perform step 7. If scenario 2 is the case, perform steps 2–6. Tip: The existing LIN cable connecting the vehicle electrical system control module to sensor G395 could be pinched or cut if scenario 2 is the case. 2. Check the LIN cable connecting the vehicle electrical system control module to sensor G395 according to GFF. 3. Check the wire terminals in the connector at sensor G395 for proper attachment, possible corrosion, and for any pins that may be pushed back or widened. 4. Check to make sure there is proper voltage going to the sensor and verify the ground is not intermittently open (wiggle test). © 2024 Audi of America, Inc. Internal Page 3 of 8 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 Audi 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 5. Check the integrity of the wire harness. There are two known sections in the wiring harness that can be affected, but the potentially affected areas are not limited to these two known sections. One of the known sections is in the driver’s footwell area where the wire harness enters the interior of the car from the engine bay (Figure 1). Figure 1. Wire harness in driver footwell area. The second known section is in the wire harness located under the driver’s side headlight (Figure 2). Figure 2. Wire harness under driver’s side headlight. 6. If a cut wire is found, install an overlay wire for the LIN bus signal. Do not attempt to repair the existing wire harness. © 2024 Audi of America, Inc. Internal Page 4 of 8 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 Audi 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 a. Route the new LIN bus wire from the vehicle electrical system control module, J519, to the sender for sensor G395 so that it enters the interior of the vehicle through the driver’s side fender/lower A-pillar area through the grommet indicated in the images at right (Figures 3 and 4). Tip: Do not route the wire through the same opening used by the existing wire harness. Figure 3. Grommet in driver’s side fender/lower A-pillar area used for pass-through for new overlay wire. Figure 4. Access hole in grommet. Tip: The LIN bus between the vehicle electrical system control module and sensor G395 may contain a junction point shared with other modules depending on the vehicle. Ensure that the junction points are maintained when routing the overlay. © 2024 Audi of America, Inc. Internal Page 5 of 8 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 Audi 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 On vehicles with a charisma switch (ride selection switch located on the instrument panel) route the new cable of the sender for sensor G395 to junction B549 (Figure 5, red arrow). Figure 5. Cable routing with charisma switch option. b. Seal off the opening around the wire with Butyl sealant to prevent water intrusion (Figure 6). Figure 6. Access hole in grommet to be sealed with Butyl sealant. 7. Replace the sender for sensor G395 and the o-ring. © 2024 Audi of America, Inc. Internal Page 6 of 8 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 Audi 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 Warranty Claim Type: • 110 Up to 48 Months/50,000 Miles. • G10 for CPO Covered Vehicles – Verify Owner. • If vehicle is outside of any warranty, this Technical Service Bulletin is informational only. Service Number: 8757 – Pressure sensor inspection / replacement or refrigerant circuit repairs 9715 – Electrical wiring inspection and repairs Damage Code: 0040 - Pressure sensor inspection / replacement or refrigerant circuit repairs 0033 - Electrical wiring inspection and repairs Labor Operations: Diagnostic Time: Check front left wiring loom 9709 0199 175 TU Repair front left wiring loom 9709 4199 165 TU Drain and refill refrigerant (if necessary) 8703 1700 See SRT with associated operations Replace A/C pressure/temperature sensor (G395) 8709 XXXX See SRT with associated operations GFF 0150 0000 (See Elsa) Time stated on the diagnostic protocol (Max 50 TU) Claim Comment: Road test prior to service procedure No allowance 0 TU Road test after service procedure No allowance 0 TU As per TSB 2020124/14 All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty. Required Parts and Tools Part Number Part Description Quantity 4H0959126C Pressure sensor 1 7H0820896 O-ring 1 © 2024 Audi of America, Inc. Internal Page 7 of 8 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 Audi 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 Additional Information All parts and service references provided in this TSB (2020124) are subject to change and/or removal. ©2024 Audi of America, Inc. All rights reserved. The 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 Audi 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. © 2024 Audi of America, Inc. Internal Page 8 of 8 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 Audi 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.