This bulletin applies to 2014 and 2015 Acura MDX vehicles. After driving in reverse and steering, a buzz or grunt may be heard after shifting from reverse to drive and turning the steering wheel.
The software that manages the electric power steering (EPS) is designed to provide good steering feedback in all operating conditions. To acquire the correct feel, different settings are required in reverse and forward directions.
The improved software is designed to prevent the buzz or grunt during the transition of rapidly changing from reverse to drive while turning the steering wheel. The corrective action involves updating the EP control unit software, using application version 3.01.40 or later and HDS software version 3.015.020 or later.
Before beginning the repair, make sure that both the HDS and MVCI are updated. If the MVCI displays “This vehicle does not need an update at this time” during the update, the software has already been installed.
YEAR/MODEL……………….………… PROGRAM ID ………. PROGRAM P/N
2014-2015 MDX 2WD Tech................. Z5A01......................... 39990-TZ5-A01
2014-2015 MDX 2WD Advance............Z5A61......................... 39990-TZ5-A61
2014-2015 MDX SH-AWD Tech............ Z6A01.........................39990-TZ6-A01
2014-2015 MDX SH-AWD Advance.......Z6A61.........................39990-TZ6-A61
