Technical Bulletin
Model(s)

Year

Jetta, Jetta
Wagon

2009

Golf, Jetta, Jetta
SportWagen

2010-2013

Passat

2012-2013

Touareg

2009-2010

Touareg

2011-2013

Beetle

2013

Eng. Code

Trans. Code

VIN Range From

VIN Range To

All

All

All

All

All

All

All

All

All

All

All

All

All

All

All

All

All

All

2.0L TDI
(CBEA)
2.0L TDI
(CJAA)
2.0L TDI
(CKRA)
3.0L TDI
(CKRA)
3.0L TDI
(CNRB)
2.0L TDI
(CJAA)

Condition
01 12 31 October 24, 2012 2023591 Supersedes T. B. V011015 dated November 10, 2010 to add additional text
and model year applicability.
TDI Clean Diesel I/M (Inspection Maintenance) Testing Issues due to Readiness Not Set
DTCs were recently erased from the vehicle’s engine control module (ECM).
A Volkswagen TDI clean diesel is not ready for I/M (Inspection Maintenance) testing due to readiness codes not
being fully set.
Tip:
This does not indicate any technical problems with the vehicle, only that more driving may be necessary to set full
OBD readiness.
Certain environmental conditions and customer driver profiles may extend the drive time required to fully set
readiness on TDI clean diesel vehicles. Fully setting the DPF monitoring function requires a cycle of building soot
and burning the soot off during a regeneration process.
Tip:
If possible, advise customer not to service vehicle directly before I/M inspection. If the readiness bits are reset,
this can create a condition where extensive driving is required prior to setting full readiness.

Page 1 of 8
© 2012 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 Bulletin
Technical Background
Some readiness codes on TDI clean diesel vehicles require special driving conditions to be set. If DTCs have
been recently erased from the vehicle’s ECM, it may take additional driving under different conditions to fully set
OBD readiness parameters.
MVB 89 (on non-UDS protocol ECM’s) will store correct data concerning OBD readiness. Figure 1 illustrates how
to manually read OBD readiness codes.

Figure 1. An example of a possible MVB 89 reading. Actual values will depend on vehicle tested and OBD
readiness status.

Tip:
Information on the readiness status on UDS protocol vehicles is available by reading the Mode 1 – Mode 10 data
in the OBD section of the scan tool.

Page 2 of 8
© 2012 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 Bulletin
Additional Information:
Interpreting Bit Values:
MVB89 is displayed as an 8-bit value. Depending on which diagnostic tester is used, the measurement value may
be displayed as follows: „1010 0100“. All positions in the measurement value are described in bits, where Bit0 is
the rightmost position and Bit7 is the leftmost position.
Example:
MVB89/4 = 1000 0011
Bit0

1

Test NMHC catalyst monitoring (1 = not complete; 0 = complete)

Bit1

1

Test NOx/SCR aftertreatment monitoring (1 = not complete; 0 = complete)

Bit2

0

optional

Bit3

0

Test Boost pressure system monitoring (1 = not complete; 0 = complete)

Bit4

0

optional

Bit5

0

Test Exhaust gas sensor monitoring (1 = not complete; 0 = complete)

Bit6

0

Test PM filter monitoring (1 = not complete; 0 = complete)

Bit7

1

Test EGR system monitoring (1 = not complete; 0 = complete)

MVB 89 (EOBD Status 1)
MVB 89/1

MVB 89/2

Monitor status since
Monitor Status since
DTCs cleared DATA A DTCs cleared DATA B

MVB 89/3

MVB 89/4

Monitor Status since
DTCs cleared DATA
C

Monitor Status since
DTCs cleared DATA
D

" MVB 89/1" Describes whether DTCs are stored and how many
_000 XXXX

# of DTCs stored in this ECU

X000 0001

1 DTCs stored

X000 0010

2 DTCs stored

X000 0011

3 DTCs stored

....

......................

X000 1000

8 DTCs stored

0XXX XXXX

MIL-Lampe off

1XXX XXXX

MIL-Lampe on

Page 3 of 8
© 2012 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 Bulletin
"MVB 89/2" Describes which functions are supported and the fuel type
Bit0

Support: Misfire monitoring (1 = supported; 0 = not supported)

Bit1

Support: Fuel system monitoring (1 = supported; 0 = not supported)

Bit2

Support: Comprehensive component monitoring (1 = supported; 0 = not supported)

Bit3

Compression ignition monitoring = Diesel

Bit4

Test Misfire monitoring (1 = not complete; 0 = complete)

Bit5

Test Fuel system monitoring (1 = not complete; 0 = complete)

Bit6

Test Comprehensive component monitoring (1 = not complete; 0 = complete)

Bit7

optional

" MVB 89/3" Describes which monitors are supported on this vehicle
Bit0

Support: NMHC catalyst monitoring (1 = supported; 0 = not supported)

Bit1

Support: NOx/SCR after-treatment monitoring (1 = supported; 0 = not supported)

Bit2

optional

Bit3

Support: Boost pressure system monitoring (1 = supported; 0 = not supported)

Bit4

optional

Bit5

Support: Exhaust gas sensor monitoring (1 = supported; 0 = not supported)

Bit6

Support: PM filter monitoring (1 = supported; 0 = not supported)

Bit7

Support: EGR system monitoring (1 = supported; 0 = not supported)

" MVB 89/4" provides the readiness status of the SUPPORTED systems from MVB 89/3
Bit0

Test NMHC catalyst monitoring (1 = not complete; 0 = complete)

Bit1

Test NOx/SCR after-treatment monitoring (1 = not complete; 0 = complete)

Bit2

optional

Bit3

Test Boost pressure system monitoring (1 = not complete; 0 = complete)

Bit4

optional

Bit5

Test Exhaust gas sensor monitoring (1 = not complete; 0 = complete)

Bit6

Test PM filter monitoring (1 = not complete; 0 = complete)

Bit7

Test EGR system monitoring (1 = not complete; 0 = complete)

Production Solution
No Production Solution required.

Page 4 of 8
© 2012 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 Bulletin
Service
1. To check the correct status of OBD readiness, refer to MVB 89 and the supplemental information in the
Technical Background section (applies to non-UDS protocol vehicles). For ECMs with UDS protocol, readiness
status can be obtained by reading the Mode 1 – Mode 10 data within the OBD section of the scan tool.
2. If any OBD system indicates incomplete monitoring (“1” shown in Byte 4) with no DTCs stored in the ECM, no
repair is necessary.
Tip:
There is no need to repair any vehicle system due to readiness not being set. Repair work is required only if there
is a relevant DTC stored within the ECM and the MIL is illuminated. Ignore pending DTCs.
Tip:
Do not reset the ECM unless a DTC is saved in memory and the MIL is illuminated. Ignore pending DTCs.
Resetting the ECM will erase the readiness codes and additional driving will be required to set the readiness
codes.
3. The vehicle requires additional driving to complete the OBD readiness checks. Drive the vehicle until all
required monitoring systems indicate complete readiness before attempting emissions testing. Do not send a
customer to I/M testing until the readiness meets the minimum state requirements.
4. Contact the VW Technical Helpline (TAC) if there are difficulties setting readiness on a TDI clean diesel vehicle.
Procedure:
Required conditions for running this procedure:
Switch OFF accessories (ex. Heated seats, rear defroster, climate control, lights, etc.).
No fault entries recorded in the Engine Control Module (ECM).