A871237 2020124-
Service Bulletin Details
Public Details for: A871237 2020124-
Supersedes technical service bulletin group 87 number 12-32 dated september 5, 2012. Air conditioning is inoperative. The hvac blower functions normally. Battery discharged; however, when charged, there is no bus silence when vehicle ignit
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Technical Service Bulletin 87 Air conditioning inoperative 87 12 37 2020124/8 November 16, 2012. Supersedes Technical Service Bulletin Group 87 number 12-32 dated September 5, 2012 for reasons listed below. Model(s) Year VIN Range A4 2009-2011 All A5, S5 2008-2011 All Cabrio 2010-2011 All A6 2005-2011 All A8 2004-2010 All Vehicle-Specific Equipment Not Applicable Condition REVISION HISTORY Revision Date Purpose 8 - Revised header data (added D3 pull ahead) Revised Service Revised Warranty (Additional SRT) 7 9/5/2012 Revised Service (Added labels a-d) Revised Warranty 6 7/23/2012 Revised Service (Added an additional descriptive note and text) 5 8/15/2011 Revised Service (Added additional steps and images) Revised Warranty 4 4/8/2011 Revised Condition, Technical Background, Production Solution 3 3/22/2011 Revised header data (Added models and model years) Revised Technical Background, Production Solution, Service, and Required Parts and Tools 2 4/23/2010 Revised Technical Background, Production Solution, and Service Page 1 of 9 © 2012 Audi 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 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 1 2/27/2009 Original publication 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 J519 Central Electrics Control unit to Sensor G395 is pinched or cut. This affects the A4/S4, A5/S5 Coupe and Cabriolet, and Audi 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 Vehicle Electrical System Control Module J519. Vehicle Electrical System Control Module J519 transfers the information provided by the sensor via the comfort data bus to Climate Control Module J255. Production Solution An improved A/C Pressure/Temperature 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), Audi Q5, A6, A8: If DTCs are stored in the J255 Climate Control Module for the G395 pressure sensor, then check the system pressures and refrigerant volume. Page 2 of 9 © 2012 Audi 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 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 If system pressures and refrigerant volume are low, check for refrigerant leaks at G395. If a leak is found, then replace the G395. If the system pressure and refrigerant volume are correct, perform guided fault finding. If an implausible pressure value is found in MVB 1, field 4, then replace G395. Tip: Install only the improved G395. See part numbers in Required Parts and Tools. Page 3 of 9 © 2012 Audi 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 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), Audi 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 Page 4 of 9 © 2012 Audi 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 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 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 J519 Vehicle Electrical System Control module to the G395 Pressure Sensor could be pinched or cut if scenario 2 is the case. 2. Check the LIN cable connecting the J519 Central Electrics Control unit to the G395 pressure sensor according to guided fault finding. 3. Check the wire terminals in the connector at the G395 pressure sensor 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). 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. Page 5 of 9 © 2012 Audi 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 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 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. a. Route the new LIN bus wire from the power system control unit J519 to the sender for refrigerant pressure/temperature 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 Figures 3 and 5. Tip: Do not route the wire through the same opening Figure 3. Grommet in driver’ s side fender/lower A-pillar area used for used by the existing wire pass-through for new overlay wire. harness. Tip: The LIN bus between J519 and G395 may contain a junction point shared with other modules depending on the vehicle. Ensure to maintain the junction points when routing the overlay. Page 6 of 9 © 2012 Audi 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 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 refrigerant pressure/temperature G395 to junction B549 as indicated by the red arrow in Figure 4. Figure 4. Cable routing with charisma switch option. Page 7 of 9 © 2012 Audi 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 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 b. Seal off the opening around the wire with Butyl sealant to prevent water intrusion. Figure 5. Seal off access hole in grommet with Butyl sealant. 7. Replace the sender for refrigerant pressure/temperature G395. Warranty Claim Type: Use applicable claim type. If vehicle is outside any warranty, this Technical Service Bulletin is informational only. Service Number: 8709 Damage Code: 0010 Labor Operations: Repair front left wiring loom 97 15 99 99 165 TU Drain and refill refrigerant (if necessary) 87 03 17 00 50 TU Check front left wiring loom 97 15 99 99 175 TU Replace A/C Pressure/temperature Sensor – Use appropriate Use appropriate G395- published labor published SRT in operation in ElsaWeb based ElsaWeb based on on model. model. Page 8 of 9 © 2012 Audi 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 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 Diagnostic Time: GFF 01 50 00 00 Time stated on diagnostic protocol not to exceed 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 #2020124/8 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 4H0 959 126 Pressure sensor 1 Additional Information All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information. Page 9 of 9 © 2012 Audi 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 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.