TB-01-12-04

SB-10043602-4523
Technical Bulletin
Model(s)
Year
Eng. Code
Trans. Code
VIN Range From
VIN Range To
Jetta, Jetta Wagon,
Golf, Rabbit, GTI,
R32
2001-2008
All with Gasoline
Engine
All
All
All
Passat, Passat
Wagon
2001-2008
All with Gasoline
Engine
All
All
All
Beetle, Beetle
Convertible
2001-2008
All with Gasoline
Engine
All
All
All
Touareg
2004-2008
All with Gasoline
Engine
All
All
All
Eos
2006-2008
All with Gasoline
Engine
All
All
All
Phaeton
2004-2006
All with Gasoline
Engine
All
All
All
Tiguan
2008
All with Gasoline
Engine
All
All
All
Condition
01 12 04 February 10, 2012 2028517
Diagnostic Misfire Assistance after performing Campaign 28F/P1 (Gasoline Engines Only)
The following symptoms may also accompany the customers concern:
 Campaign 28F3/P1 has been performed. (model year 2002-2007 only).
 Rough idle.
 Engine may have reduced performance without significant loss of power or stalling.
 MIL ON or flashing.
 One or more of the following DTCs are stored:
DTC
Description
P0300
Randon/Multiple Cylinder Misfire Detected
P0301-P0312
Cyl.1 Misfire Detected- Cyl. 12 Misfire Detected
© 2012 Volkswagen Group of America, Inc.
Page 1 of 4
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 Bulletin
Technical Background
Generation II coils listed in Campaign 28F3/P1 generally are not the root cause of engine misfire
conditions. Replaced ignition coils have commonly been related to conditions such as:
 Incorrect installation of ignition coils.
 Loose or damaged electrical connections.
 Circuit grounds.
 Poor fuel quality.
 A number of other reasons not directly related to ignition coil operation.
Proper GFF misfire diagnosis must be followed before replacing any ignition coils.
Production Solution
Not applicable.
Service
Ensure all campaigns and applicable TSBs have been performed
Due to multiple causes for engine misfire, please ensure all campaigns and applicable TSBs have been
performed.
Repeat repairs must be carefully addressed to identify the root cause of the concern. Please utilize proper
diagnosis steps to ensure that the vehicle is repaired properly and that the concern has been identified, repaired
and verified.
Obtain information from the customer
To repair the vehicle correctly, obtain as much information as possible from the customer about the symptoms of
the condition and when it occurred.
 In what situation (turning, etc.) does the condition occur?
 Under what environmental conditions (road conditions, weather, temperature, start conditions, etc.) does the
condition occur?
 What is the operating situation of the vehicle (activated electrical equipment, gear selection, etc.) when the
condition occurs?
 Can the complaint be reproduced?
© 2012 Volkswagen Group of America, Inc.
Page 2 of 4
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 Bulletin
Workshop procedure
1. Read out the data memory of all engine control modules, and note the environmental conditions on the DTC
log.
 If there are other entries in addition to combustion misfires, address the other entries before addressing the
cylinder misfires.
 If DTC P0301 – P0312 (Cyl.1 Misfire Detected - Cyl.12 Misfire Detected) is accompanied by P1250 (Fuel level
too low), it is likely the faults occurred due to a low fuel level and not a malfunction of the coils.
 Review all applicable TSBs related to cylinder misfires and ECM software improvements before diagnosing
the misfire condition. For example, if data shows that a DTC was set during cold start, search ElsaWeb for
TSBs related to cold start misfires.
2. Try to duplicate customer complaint based on the environmental conditions at the time the DTC was set.
 The freeze-frame data gives important indicators for the traceability of the complaint, in particular if it occurs
sporadically or at cold start.
3. Review the vehicle repair history for previous misfire or maintenance service that could be related to the
current complaint.
4. Observe the requirements of Guided Fault Finding. Perform Guided Fault Finding in full according to the
proposed sequence (test plan). Do not skip any steps.
5. Complete Guided Fault Finding correctly and set the readiness code.
Tip:
This is important to ensure that no subsequent faults occur due to the misfire.
6. In the case of single cylinder misfires:
 Before replacing components, determine whether the misfire migrates to the other cylinders after
exchanging the coils. If necessary, perform a test drive to ascertain this.
 If the misfire migrates to the cylinder the coil was moved to:
 Read the DTC memory, print and attach both diagnostic logs (before and after) to the repair order.
 Return both coils to their original cylinders, and only replace the defective coil.
7. Verify repair under the same environmental conditions (e.g.: engine speed, engine load value, vehicle speed,
coolant temperature, intake air temperature, ambient air pressure, voltage at terminal 30, etc.) as noted on the
DTC log.
© 2012 Volkswagen Group of America, Inc.
Page 3 of 4
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 Bulletin
Warranty
Information only.
Required Parts and Tools
No Special Parts Required.
Tool Description
Tool No:
Midtronics Battery Tester/Charger
InCharge 940 (INC-940)
VAS Diagnostic Tool
VAS-PC, 5051B, 5052A, 6150X
(Base CD V19.01.00 and Brand DVD V19.11.01 or
higher)
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.
© 2012 Volkswagen Group of America, Inc.
Page 4 of 4
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.