NHTSA ID Number: 10120384
Manufacturer Communication Number: 07-007-17-3384
TSB/Document Date: 2017-10-21
Summary
Some customers may complain about poor heater performance even after the engine reaches normal operating temperature. This may be caused by a clogged heater unit. For Mazda6 and CX-5, the check engine light may illuminate with the DTC P011A:00 stored at the same time. P011A:00 ECT sensor No.1/No.2 performance problem. NOTE: Refer to TSB 01-015/15 if the customer is using a block heater at temperatures below freezing.
Technical
Service Bulletin
Mazda North American Operations
Irvine, CA 92618-2922
Subject:
POOR HEATER PERFORMANCE WITH DTC P011A:00
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
APPLICABLE MODEL(S)/VINS
2014-2016 Mazda3 Japan Built vehicles with VINs lower than JM1 BM ****** 355940 (produced before June
23, 2016)
2014-2016 Mazda3 Mexico Built vehicles with VINs lower than 3MZ BM ****** 330142 (produced before
Sept 03, 2016)
2017-2018 Mazda3
2014-2016 Mazda6 vehicles with VINs lower than JM1 GJ ****** 488592 (produced before June 30, 2016)
2017 Mazda6
2017-2018 Mazda6 Mexico
2013-2017 CX-5 vehicles with VINs lower than JM3 KE ****** 921726 (produced before Dec 21, 2016)
DESCRIPTION
Some customers may complain about poor heater performance even after the engine reaches normal
operating temperature. This may be caused by a clogged heater unit.
For Mazda6 and CX-5, the check engine light may illuminate with the DTC P011A:00 stored at the same
time.
P011A:00 ECT sensor No.1/No.2 performance problem
NOTE: Refer to TSB 01-015/15 if the customer is using a block heater at temperatures below freezing.
Customers having this concern should have their vehicle repaired using the following repair procedure.
DIAGNOSIS PROCEDURE
Perform the following diagnosis procedure to determine if the concern is caused by a clogged heater core.
NOTE: DTC P011A:00 (ECT2 sensor on the heater hose) is available only for CX-5 and Mazda6.
Page 1 of 9
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.
© 2017 Mazda
North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
Page 2 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
NOTE A: DTC P011A:00 (ECT sensor No.1/No.2 performance problem) is for CX-5 and Mazda6 only.
The purpose of having two ECT sensors is to mutually monitor their performances. If two temperature
values detected by the sensors are different beyond the specified value, the DTC
P011A:00 is set.
Location of ECT sensors
(Mazda6 is shown)
NOTE B Check ECT Sensors for output performance
Page 3 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
Perform the following inspection during a cold soak (vehicle sitting overnight without starting).
Read the temperature values of the following PIDs in M-MDS Datalogger.
ECT: Engine Coolant Temperature.
ECT2_V: ECT sensor No.2 voltage.
AMB_TEMP: Ambient Temperature.
Use below table to convert ECT2_V (voltage) into the temperature.
Output (V) 4.84 4.79 4.72 4.64 4.55 4.43 4.30 4.14 3.96 3.77 3.56
Temp (°C) -40 -35 -30 -25 -20 -15 -10
-5
0
5
10
Temp (°F) -40 -31 -22 -13
23
32
41
50
-4
5
14
Output (V) 3.33 3.10 2.86 2.63 2.39 2.17 1.95 1.75 1.57 1.40 1.25
Temp (°C) 15
20
25
30
35
40
45
50
55
60
65
Temp (°F) 59
68
77
86
95 104 113 122 131 140 149
Output (V) 1.11 0.99 0.87 0.78 0.69 0.61 0.55 0.48 0.43 0.38 0.34
Temp (°C) 70
75
80
85
90
95 100 105 110 115 120
Temp (°F) 158 167 176 185 194 203 212 221 230 239 248
ETC1 and ECT2 sensor voltage values must match the AMB_TEMP values (during a cold soak).
If the detected values are not equivalent to the ambient temperature and/or any of the following DTCs is
stored, failure of the ECT sensor related system is possible.
DTC No.
Condition
P0116:00 ECT sensor No.1 circuit range/performance problem
P0117:00 ECT sensor No.1 circuit low input
P0118:00 ECT sensor No.1 circuit high input
P2183:00 ECT sensor No.2 circuit range/performance problem
P2184:00 ECT sensor No.2 circuit low input
P2185:00 ECT sensor No.2 circuit high input
Page 4 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
NOTE C: Inspect heater hose IN and OUT for temperature difference.
Using a thick cloth or gloves, touch the heater hose IN and heater hose OUT by hand to feel the
temperature. If there is an obvious difference in temperature between both hoses, the heater core may be
clogged.
NOTE: When doing this inspection, turn the HVAC blower fan OFF. If ON, the heater core radiates heat, so
the temperature difference between IN and OUT hoses will generate heat even if the heater core is not
clogged.
Heater Hose IN (B): Upper side of heater core
Heater Hose OUT (C): Lower side of heater core
With Water Temp Sensor
Without Water Temp Sensor
Mazda
6 is
shown
Page 5 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
REPAIR PROCEDURE
If clogging of the heater core was determined by the diagnosis procedure, replace the heater core with a
new one and replace the contaminated engine coolant twice.
NOTE: Remove the old contaminated coolant by draining the coolant twice and refiling with new coolant.
WARNING:
Never remove the cooling system cap or loosen the radiator drain plug while the engine is running,
or when the engine and radiator are hot. Scalding engine coolant and steam may shoot out and
cause serious injury. It may also damage the engine and cooling system.
Turn off the engine and wait until it is cool. Even then, be very careful when removing the cap.
Wrap a thick cloth around it and slowly turn it counterclockwise to the first stop. Step back while the
pressure escapes.
When you are sure all the pressure is gone, press down on the cap using the cloth, turn it, and
remove it.
1.Replace the heater core. Refer to MGSS online Workshop Manual:
Mazda3 - A/C UNIT REMOVAL/INSTALLATION and A/C UNIT DISASSEMBLY/ASSEMBLY.
Mazda6 - A/C UNIT REMOVAL/INSTALLATION and A/C UNIT DISASSEMBLY/ASSEMBLY.
CX-5 - A/C UNIT REMOVAL/INSTALLATION and A/C UNIT DISASSEMBLY/ASSEMBLY.
2. Make sure the radiator cap is removed, then drain the coolant from the radiator drain plug as much as
possible.
3. Tighten the radiator drain plug.
4. Refill the cooling system with FL22 (55% premix) coolant at the radiator filler neck until it is close to the
top of the filler neck.
NOTE: Do not use water to adjust the coolant concentration. Minerals contained in the water may generate
deposits causing clogging of the cooling system and rust on the parts. Service coolant (FL22 55% prediluted) using a specified quality of water is the solution.
5. Install the radiator cap.
6. Start the engine and warm-up to normal operating temperature to open the thermostat. To confirm that
thermostat is fully open, the lower radiator hose will be hot to the touch.
CAUTION: The lower radiator hose will get hot when the thermostat is opened. Use a thick cloth or gloves
when touching the hose.
Thermostat initial-opening temperature: 177 - 182°F (80.5 - 83.5°C)
Thermostat full-open temperature: 188 - 193°F (86.5 - 89.5°C)
Page 6 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
7. Mix the coolant in the cooling system using the following steps:
a. Run the engine at 2,500 rpm for 5 min.
b. Maintain the engine speed at 3,000 rpm for 5 seconds, then allow the engine to idle.
8. Repeat the step 2 – 7 to replace the coolant at the second time.
9. Allow the engine to cool down so that you can safely remove the reservoir tank.
10. Drain the old coolant from the reservoir tank and then reinstall it.
11. Replace the coolant in the reservoir tank with new FL22.
12. Inspect the engine coolant and reservoir tank levels and adjust with new FL22 as needed.
13. Verify repair.
PARTS INFORMATION
Parts Number
Description
Qty.
Note 1
****-61-A10*
Heater Unit Core
1
---
****-68-162*
2
9YA0-11-00**
1
****-32-099
Bolt, Intermediate Shaft Upper
1
B455-32099B
Bolt, Intermediate Shaft Lower
1
9YA0-20-682
Bolt, Dashboard
2
BBM4-61-J17
O-Ring, Cooler Pipe Low and
Expansion Valve
2
GJ6A-61-J19
O-Ring, Cooler Pipe High
1
GJ6E-61-J19
O-Ring, Expansion Valve
1
BP4K-61-242
2
0000-77508E-20
FL22 Coolant
As
needed
As
needed
5555-FG-002
Non-reusable
part
Note 2
Use GEPC with VIN for
part number
Non-reusable
part
All Models
---
Page 7 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
Mazda6 images are shown
Trim Clip
Heater Unit Core
Bolt, Intermediate Shaft Upper
Bolt, Intermediate Shaft Lower
O-Ring, Expansion Valve
Bolt, Dashboard
O-Ring, Cooler Pipe Low
O-Ring, Cooler Pipe High
Page 8 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/17
Last Issued: 09/08/2017
WARRANTY INFORMATION
NOTE:
This warranty information applies only to verified customer complaints on vehicles eligible for
warranty repair.
This repair will be covered under Mazda’s New Vehicle Limited Warranty term.
Additional diagnostic time cannot be claimed for this repair.
Warranty
Type
A
Symptom
Code
59
Damage
Code
93
Part
Number
Main
Cause
****-61-A10*
Quantity
1
Mazda3
Operation
Number /
Labor
Hours:
XXN7TXRX
Mazda6
CX-5
4.7 Hrs.
4.8 Hrs.
Operation: Perform the diagnosis procedure, replace the heater core and replace engine
coolant twice.
NOTE: Enter coolant, refrigerant and all replacement parts as Related Part.
Page 9 of 9
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.
© 2017 Mazda North American Operations, U.S.A.
- 3X Stronger than the leading full synthetic*
- 10X Better high stress performance**
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TSB/Document ID: 07-007-17-3384
Replacement Service Bulletin Number:
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Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:APPLIANCE:AIR CONDITIONER
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