2017-2018 Honda Clarity Fuel Cell – Fuel Cell Voltage Misdetection Safety Recall

NHTSA Campaign Number: 18V921
Manufacturer Honda (American Honda Motor Co.)
Components ELECTRICAL SYSTEM, HYBRID PROPULSION SYSTEM
Potential Number of Units Affected 1,082

 

Vehicle May Lose Power

A loss of power can increase the risk of a crash.

 

Summary

Honda (American Honda Motor Co.) is recalling certain 2017-2018 Clarity Fuel Cell vehicles previously repaired under recall 18V-068. The previous software remedy may have been incomplete. As a result, the fuel cell control unit (FC-ECU) may misinterpret a small cell voltage drop, causing the vehicle to have a partial or complete loss of power.

 

Remedy

Honda has notified owners, and dealers will update the FC-ECU software, free of charge. The recall began February 14, 2019. Owners may contact Honda customer service at 1-888-234-2138. Honda’s number for this recall is A3O.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

 

Check if your Honda has a Recall


Owner Notification Letter

February 2019

https://static.nhtsa.gov/odi/rcl/2018/RCONL-18V921-3959.pdf

Download (PDF, 216KB)


Manufacturer Notices

December 21, 2018

https://static.nhtsa.gov/odi/rcl/2018/RCMN-18V921-7147.pdf

Download (PDF, 185KB)


Statement by American Honda Regarding Fuel Cell Voltage Misdetection Recall: 2017-2018 Honda Clarity Fuel Cell

https://static.nhtsa.gov/odi/rcl/2018/RMISC-18V921-4112.pdf

Download (PDF, 68KB)


DEFECT INFORMATION REPORT

https://static.nhtsa.gov/odi/rcl/2018/RMISC-18V921-9980.pdf

Download (PDF, 61KB)


Recall Acknowledgement

February 15, 2019

https://static.nhtsa.gov/odi/rcl/2018/RCAK-18V921-7830.pdf

Download (PDF, 239KB)


Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=18V921&docType=RCL


 

i-HDS Diagnostic Software and J2534 Reprogramming Software

 

Honda J2534 Pass-Thru User Guide

Honda J2534 Pass-Thru Software Download

Latest ECU Software

 

Vehicle Communication Interfaces (VCI)

The i-HDS software supports the use of a generic pass-thru VCI that is compliant with SAE J2534-1 and J2534-2. However, Honda recommends the Denso DST-i or the Bosch MVCI for use on Honda and Acura vehicles, as Honda has worked closely with these manufacturers to ensure their hardware and our software interact safely and within the J2534-1 and -2 specifications, for both diagnostics and reprogramming. If you choose to use a generic VCI, please carefully consider the customer and technical support options you will receive from your chosen device supplier. Honda does not provide technical or customer support for generic VCI devices.

The VCI Application Table below lists devices that either are approved and supported by Honda or are known to have completed and passed an independent, exhaustive validation program with our i-HDS software suite.

Manufacturer Version Information Notes VCI Name
Firmware J2534 API
DENSO 2.00.0010* 04.04 This is the current generation VCI used by Honda and Acura dealers. Honda routinely validates the functionality and provides customer support for this device. DST-i
Bosch 3.01.54* 04.04 This is the previous generation VCI used by Honda and Acura dealers. Honda routinely validates the functionality and provides customer support for this device. MVCI 
Drew Technologies 1.7.7** 04.04 This company has completed an independent i-HDS validation and claims it to function with the i-HDS software. Honda does not provide ongoing validation, nor customer support for this device. MongoosePro Honda 
Dearborn Group 3.303** 04.04 This company has completed an independent i-HDS validation and claims it to function with the i-HDS software. Honda does not provide ongoing validation, nor customer support for this device. d-briDGe Pro 

* These versions may have been superseded. Honda provides the latest supported versions to current i-HDS subscribers.
** Version used in validation program. See Terms and Conditions and Important Notice Regarding Reprogramming below for more details.

CarDAQ-Plus 2 Diagnostic Code Reader and J2534 Programming Tool
Drew Technologies (DRWCDPLUSKIT) CarDAQ-Plus J2534 Flash Reprogramming Kit
CarDAQ-M Modular PassThru J2534 Vehicle Reflash Hardware
VSI J2534 ECU Reprogrammer & Diagnostic Adapter
MAXIFLASH PRO (ALT-MF2534)

 

DST-i Information:

 

MVCI Information:

 

techinfo.honda.com

 

 

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