SA-029-20g

Service Bulletin Details

Public Details for: SA-029-20g

Some customers may experience a "in-vehicle network malfunction" warning message in the instrument cluster with one or more of the following dtc's stored: ??A?A? B119F:01 tcu - tel antenna no. 1 malfunction??A?A? B119F:13 (tcu - tel antenna


- 2020 - 2019 -

Models from 2019
2019 MAZDA MAZDA3
Service Alert
Mazda North American Operations
Irvine, CA 92618-2922
Subject:
"IN-VEHICLE NETWORK MALFUNCTION" INSTRUMENT CLUSTER
WARNING MESSAGE
Service Alert No.: SA-029/20
Last Issued: 09/10/2020
BULLETIN NOTES
This service alert supersedes the previously issued service alert listed below. The changes are noted in
Red text.
Previous Service Alert:
Date(s) Issued:
SA-029/20
07/20/20, 06/29/20, 06/23/20, 06/05/20, 04/17/20, 04/08/20and 02/25/20
SA-014/19
09/05/19 and 04/03/19
APPLICABLE MODEL(S)/VINS
2019-2020 Mazda3
2020 CX-30
DESCRIPTION
Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the
instrument cluster with one or more of the following DTC's stored:










B119F:01 TCU - Tel antenna No. 1 malfunction
B119F:13 (TCU - TEL antenna No.1 circuit malfunction)
B119F:2B (CMU - GPS antenna signal circuit malfunction)
B1252:87 TCU - Communication error with connectivity master unit (CMU)
U0156:00 VCM - Communication error with connectivity master unit (CMU)
U0156:00 BCM - Communication error with connectivity master unit (CMU)
U0198:00 BCM - Communication error with emergency call unit
U212D:00 BCM - Communication error with light control module (RH)
U3000:00 TCU - Telematics communication unit internal malfunction
Low Voltage Battery DTCs
Page 1 of 5
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:15 PM tlawrenc
Service Alert No.: SA-029/20
Last Issued: 09/10/2020
Instrument Cluster
Infotainment Center Display
REPAIR PROCEDURE
1. Verify customer concern.
2. Connect MDARS.
NOTE: Only use MDARS to scan for DTC's. If IDS is used, P0602 (PCM programming error) will falsely set.
Is the TCU shown red or green on the MDARS main screen?


Green: Go to the next step.
Red: Go toMethod For Recovering Missing TCU, then go to next step.
3. Check for:



Missing fuses
Blown fuses
Correct fuse amperage
Page 2 of 5
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:15 PM tlawrenc
Service Alert No.: SA-029/20
Last Issued: 09/10/2020
4. Refer to table below.
DTC
Action
Low Battery with or without
DTC
Perform TCU Reprogramming with the following Calibration.
1. Mazda3: BDGF-67CK2-D
2. CX-30: DGH9-67CK2-C
B119F:01 and one of the
following:
1. B119F:13
2. B119F:2B
Go to TSB 09-021/20.
Check USB cable connections between TCU and CMU.
B1252:87
U0156:00
Refer to the instructions on MGSS.
1. Mazda3: DTC U0156:00 [BODY CONTROL MODULE (BCM)]
2. CX-30: DTC U0156:00 [BODY CONTROL MODULE (BCM)]
Page 3 of 5
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:15 PM tlawrenc
Service Alert No.: SA-029/20
Last Issued: 09/10/2020
Check USB cable connections between TCU and CMU.
U0198:00
U212D:00
Refer to the instructions on MGSS.
1. Mazda3: DTC U212D:00 [BODY CONTROL MODULE (BCM)]
2. CX-30: DTC U212D:00 [BODY CONTROL MODULE (BCM)]
U3000:00
Replace TCU. Refer to the instructions on MGSS.
1. Mazda3: TELEMATICS COMMUNICATION UNIT
REMOVAL/INSTALLATION.
2. CX-30: TELEMATICS COMMUNICATION UNIT
REMOVAL/INSTALLATION.
Other DTC's
Refer to the instructions on MGSS.
5. Verify repair.
Method For Recovering Missing TCU
a.
ID vehicle using
MDARS.
b. IG OFF.
c. Refresh DTC.
Page 4 of 5
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:15 PM tlawrenc
Service Alert No.: SA-029/20
d.
Last Issued: 09/10/2020
IG ON while
refreshing DTC.
TCU now
e. appears.
Go to step 3.
TCU appears
Page 5 of 5
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:15 PM tlawrenc


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