A21-046

Service Bulletin
April 27, 2021
21-046
Version 1
Product Update: 2016-20 HR-V Software Update and CVT Inspection
AFFECTED VEHICLES
Year
Model
Trim Level
VIN Range
2016-20
HR-V (CVT models only)
ALL
Check the iN VIN status for eligibility.
BACKGROUND
An incorrect value in the PCM may cause a pressure problem in the CVT under certain driving conditions, causing
increased surface pressure on the belt leading to a partial or complete breakage as well as possible ring breakage. New
PCM software will increase the overall durability of the CVT primary belt within the transmission. This is accomplished by
revising operational loads placed on the belt under certain driving conditions. DTC P271E is added so at the early stages
of a CVT primary belt failure, the D light will flash, the MIL will come on, and engine power output will be reduced. This will
lessen the chances of an unexpected, sudden loss of acceleration and allow the customer an opportunity to get the vehicle
to a Honda dealer
CUSTOMER NOTIFICATION
Owners of affected vehicles will be sent a notification of this campaign.
Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.
Some vehicles affected by this campaign may be in your new or used vehicle inventory. Repair these vehicles before they
are sold.
CORRECTIVE ACTION
Update the PCM software and inspect the transmission to verify if the internal components are prematurely deteriorating
within the transmission.
NOTE:
• Failure to follow the inspection procedure correctly may result in the customer’s vehicle experiencing a transmission
failure after the repair. Improper repairs could be subject to debit.
• Failure to perform the software update will result in the vehicle not having the ability to detect CVT belt slippage, trigger
the MIL, and set a DTC which could cause the CVT belt to break and the vehicle not move when accelerating.
CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment,
and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not
assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact
an authorized Honda automobile dealer.
© 2021 American Honda Motor Co., Inc. – All Rights Reserved
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REQUIRED MATERIALS
Part Name
Part Number
Quantity
Disposable Paint Strainer (pack of 250) or Commercially
equivalent (fixes 250 vehicles)
PMICSM6
1
Fine Point Permanent Marker (Black or Red) or Equivalent
Commercially Available
1
NOTE: Available through the Honda Tool and Equipment Program. Call (888) 424-6857 or use the fax order form provided
in the Honda Tool and Equipment Program Catalog. Phone lines are open Monday through Friday from 7:30 AM to 7:00
PM Central Time.
TOOL INFORMATION
Tool Name
Part Number
Quantity
Belt Fragment Detection Kit (includes belt fragment detection
template and a magnet, 5 kits were shipped to each dealership)
07AAJ-52NA100
1
WARRANTY CLAIM INFORMATION
Operation
Number
Description
Flat Rate
Time
1255G3
Update the PCM
Software.
0.2 hr.
A
Do the PCM idle learn
procedure.
0.1 hr.
B
Inspection. (Includes
time to remove and
install lower engine
cover on 2WD).
0.3 hr.
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
6MT00
EAU00
A21046A
37820-51M-A63
Skill Level: Repair Technician
SOFTWARE INFORMATION
This new software will increase the overall durability of the CVT belt within the transmission. This is accomplished by
revising operational loads placed on the belt under certain driving conditions. DTC P271E was added so at the early
stages of a CVT belt failure, the D light will flash, the MIL will come on, and engine power output will be reduced. This will
lessen the chances of an unexpected, sudden loss of acceleration and allow the customer an opportunity to get the vehicle
to a Honda dealer.
NOTE: Unnecessary or incorrect repairs resulting from a failure to update the diagnostic and reprogramming software are
not covered under warranty.
Before beginning the repair, make sure all diagnostic and reprogramming software are updated as listed.
i-HDS Software Version
1.006.026 or later
HDS Software Version
3.104.014 or later
J2534 Rewrite Software Information
PC Application Version
1.2.1.1
Database Update
05-APR-2021 or later
NoticeDB Version
05-APR-2021 or later
Update only the systems and software listed in this service bulletin.
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American Honda has validated and approved the Denso DST-I as the vehicle communication interface (VCI) to
support this service bulletin.
For more information about updating vehicle systems, refer to service bulletin 01-023, Updating Control Units/Modules.
Year/Model
Drivetrain
Trim Level
Vehicle System
Program ID (or later)
2016 HR-V
2WD
LX
PCM
37805-51M-A54
2016 HR-V
2WD
EX, EXL
PCM
37805-51M-A64
2016 HR-V
AWD
LX
PCM
37805-51M-A74
2016 HR-V
AWD
EX, EXL
PCM
37805-51M-A84
2017 HR-V
2WD
LX
PCM
37805-51M-C53
2017 HR-V
2WD
EX, EXL
PCM
37805-51M-C63
2017 HR-V
AWD
LX
PCM
37805-51M-C73
2017 HR-V
AWD
EX, EXL
PCM
37805-51M-C83
2018 HR-V
2WD
LX
PCM
37805-51M-C22
2018 HR-V
2WD
EX, EXL
PCM
37805-51M-C32
2018 HR-V
AWD
LX
PCM
37805-51M-C42
2018 HR-V
AWD
EX, EXL
PCM
37805-51M-C92
2019 HR-V
2WD
LX
PCM
37805-51M-L52
2019 HR-V
2WD
EX, EXL
PCM
37805-51M-L72
2019 HR-V
2WD
Sport
PCM
37820-51M-L62
2019 HR-V
AWD
LX
PCM
37805-51M-L82
2019 HR-V
AWD
EX, EXL
PCM
37805-51M-L42
2019 HR-V
AWD
Sport
PCM
37820-51M-L92
2020 HR-V
2WD
LX
PCM
37805-6N8-A52
2020 HR-V
2WD
EX, EXL
PCM
37805-6N8-A72
2020 HR-V
2WD
Sport
PCM
37820-6N8-A62
2020 HR-V
AWD
LX
PCM
37805-6N8-A12
2020 HR-V
AWD
EX, EXL
PCM
37805-6N8-A32
2020 HR-V
AWD
Sport
PCM
37805-6N8-A22
REPAIR PROCEDURE
NOTE:
•
•
•
•
•
•
•
Make sure the 12-volt battery is fully charged before starting an update.
Connect a fully charged jumper battery to the vehicle, and leave it connected during the entire procedure to maintain
steady voltage.
Do not use the GR8 because the vehicle requires a steady electrical current.
Control module failure caused by the improper completion of a software update (early key cycle, low battery voltage,
disconnected DLC cable, etc.) is not covered by warranty.
If an error occurs during the update or the i-HDS freezes, do not disconnect the battery or turn the ignition to OFF.
Reboot the i-HDS, and start over.
To prevent control unit damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power
windows, door locks, etc.) during the update.
Warranty reimbursement for technician labor is not allowed for routine checking/installation of any available software
update.
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1. Update the PGM-FI software using the J2534 Rewrite software with the DST-i. Refer to service bulletin 01-023,
Updating Control Units/Modules.
2. ECM/PCM Idle Learn.
NOTE: Make sure all electrical items (the A/C, the audio, the lights, etc.) are off.
3. Turn the vehicle to the ON mode, and wait 2 seconds.
4. Start the engine. Hold the engine speed at 3,000 rpm without load (CVT in P or N) until the radiator fan comes on, or
until the engine coolant temperature reaches 194 °F (90 °C).
5. Let the engine idle for about 5 minutes with the throttle fully closed.
NOTE: If the radiator fan comes on, do not include its running time in the 5 minutes.
6. Turn the vehicle to the OFF (LOCK) mode.
7. Jump the SCS line with the HDS.
8. Wait 60 seconds, and exit the SCS mode with the HDS.
CVT INSPECTION
The CVT inspection uses a special magnet to detect any metal fragments that may have been shed from the CVT belt.
These fragments will collect in the oil pan. The inspection will be performed by placing a clear template on the CVT oil pan;
tracing the slots on the template onto the pan with a marker, removing the template and then slowly sliding the magnet
over lines 1 through 7 on the pan to the inspection area. If the magnet sticks to the inspection area, then the transmission
will need to be replaced.
NOTE: Click HERE to see video of the transmission inspection.
1. Remove the engine undercover (2WD models).
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2. Remove the front splash shield.
3. Wipe the oil pan with a shop towel, removing any dirt or contamination.
4. Remove the clear protective wrapper from the template.
5. Place the clear template (07AAJ-52NA100) on the oil pan as shown below. Line up the template with the oil pan bolts and
the center of the transmission oil pan with the dashed lines.
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6. While holding the template with one hand, apply pressure to keep the left side of the template flat against the pan, and trace
the grooves on that side with a permanent marker as shown above. Keeping it in position, press against the right side of the
template so the right-side grooves are now flush against the oil pan and trace the remaining lines including the inspection
area circle on that side. Next, trace grooves on Letter “A” with a permanent marker.
7. Remove the template from the oil pan.
8. Starting on line #1, place a magnet on each of the lines starting from the outside, slowly trace each line to the center
inspection circle on the template, then lift the magnet off the inspection area (shown in black below).
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9.
Repeat until you have traced all 7 lines with the magnet.
NOTE: It is important to slide the magnet smoothly from outside (bolt side) of the oil pan slowly, following the 7 lines
you traced to the inspection area circle. While sliding the magnet on the oil pan, you may feel the magnet sticking in
some areas shown on illustration above. This is normal as there are some bolts under the oil pan that attach the valve
body to the transmission.
10. After tracing all 7 lines from the outside to the inspection area, let go of the magnet to see if it sticks in place. If the
magnet sticks to the oil pan in the inspection area there is a problem with the transmission, go to service bulletin 21047, Warranty Extension 2016 - 20 HR-V CVT Premature Belt Deterioration. If the magnet does not stick to the oil
pan, go to the next step.
11. Place the magnet in the inspection area and slowly trace the “A” lines with the magnet to the lower right-side magnet
shown on the oil pan (see image below). This is done to move any metal contaminates too small to hold the test
magnet to the internal transmission magnet. Inspection is complete.
12. Install the engine undercover (2WD models) and front lower splash shield.
13. California residents only: Fill out a Vehicle Emissions Recall – Proof of Correction certificate, and use EAU as the recall
number. Have the service advisor give the certificate to your customer, and advise him or her to keep it as proof that
the recall was completed. Your customer will need to submit this certificate to the DMV only if the DMV requests it. If
you need more certificates, use reorder number Y0657.
END
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