Service Bulletin

18-090

November 14, 2023

Version 5

Product Update: 2018 Clarity Plug-In Hybrid E-VTC & 3-Way Valve
Software Update (P100C/P0010/P26A3)
Supersedes 18-090, dated October 17, 2019, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year

Model

Trim Level

VIN Range

2018

Clarity Plug-In Hybrid

ALL

Check the IN VIN status for eligibility

REVISION SUMMARY
Under REPAIR PROCEDURE, Vehicle Emission Recall-Proof of Correction Certificate reorder information was added.
BACKGROUND
There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve
malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control
[VTC] malfunction). There are up to three updates that must be performed on applicable vehicles. Check the iN VIN status
inquiry for applicability.


18-089: Product Update: 2018 Clarity Plug-In Hybrid Climate Control Unit Replacement



18-090: Product Update: 2018 Clarity Plug-In Hybrid E-VTC & 3-Way Valve Software Update (P100C/P0010/P26A3)



18-091: Product Update: 2018 Clarity Plug-In Hybrid Driver Display Software Update (Mileage)



18-096: Product Update: 2018 Clarity Plug-In Hybrid Warranty Information CD

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
Clear the DTC’s and update the PGM-FI software with the latest version.
WARRANTY CLAIM INFORMATION
Operation
Number

Description

Flat Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

1225A1

Update the PCM
software.

0.2 hr

6VT00

U2600

A18090A

37805-5WJ-A61

Skill Level: Repair Technician

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.

© 2023 American Honda Motor Co., Inc. – All Rights Reserved

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SOFTWARE INFORMATION
NOTE: Unnecessary or incorrect repairs resulting from a failure to update the i-HDS are not covered under warranty.
i-HDS Software Version: 1.005.033 or later
J2534 Rewrite Software Information:


PC Application Version: 1.1.0.6 or later



Database update: 17-SEP-2019 or later

Before beginning the repair, make sure that both the i-HDS and J2534 rewrite software are updated as listed
above. Do only the update list in this service bulletin.
You cannot apply the updates with the MVCI as a standalone tool. To update the vehicle, you must use the MVCI
interface with the J2534 Rewrite PC application on the i-HDS.
For more information about updating the i-HDS, MVCI, DST-i, and vehicle systems, refer to service bulletin 01-023,
Updating Control Units/Modules.
Year/Model

Software System

Program ID (or later)

Program P/N (or later)

2018 Clarity Plug-In Hybrid

PGM-FI

WJA610

37805-5WJ-A61

REPAIR PROCEDURE
1. Update the PGM-FI software using the i-HDS J2534 rewrite software with the MVCI or DST-i. Refer to Service Bulletin
01-023, Updating Control Units/Modules.
2. Fill out a Vehicle Emissions Recall - Proof of Correction certificate and use U26 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, go to Helminc.com or call at 800-782-4356, and use order number Y0657.

Check for and complete any open campaigns for this vehicle.

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