Mitsubishi Recalls Outlander and Eclipse Cross Vehicles; Brake Safety Systems May Stop Operating
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Mitsubishi Recalls Outlander and Eclipse Cross Vehicles; Brake Safety Systems May Stop Operating

A software anomaly could turn off certain safety systems while they are in use

September 25, 2018

Mitsubishi is recalling certain 2018 Mitsubishi Outlander Sport vehicles equipped with a Forward Collision Mitigation (FCM) system and 2018 Mitsubishi Outlander PHEV and Eclipse Cross vehicles and 2017-2018 Outlander vehicles equipped with an Adaptive Cruise Control (ACC) system and/or an Electric Parking Brake (EPB) system. The software for the Hydraulic Unit Electronic Control Unit (HU-ECU) may be incorrect, possibly preventing the intervention of these safety systems when any are in use.

What's the Problem?

The problem first arose in March 2017 when Mitsubishi received a report of an "ACC CHECK" warning appearing in the instrument cluster while driving and two additional reports through August 2017. Mitsubishi was unable to reproduce the problem with the returned parts through standard testing, only later able to reproduce it with an on-vehicle test.

Mitsubishi and the part supplier conducted further investigations from December 2017 through April 2018. Mitsubishi determined that inappropriate software in the HU-ECU generated electrical noise when the pump motor operated, which caused the HU-ECU to reset. The software was corrected in production.

The FCM, ACC, and EPB safety systems, as well as the Anti-lock Braking System (ABS), rely on the proper functioning of the HU-ECU to operate. If the HU-ECU resets, these other systems will be disabled. The following are possible consequences if the HU-ECU software resets while any of the safety systems are in operation at the time:

  • If ACC system and/or FCM system is in operation, automatic braking
    will be cancelled.
  • If ABS is in operation, the wheels will lock momentarily.
  • If ASC is in operation the electrical stability control function will be
    cancelled momentarily.
  • If the Brake Auto Hold (BAH) function is in operation, the brake will be

If any brake functions were to not operate properly, it could increase the risk of a crash. There have been no reported injuries or accidents due to this condition.

What happens next?

Mitsubishi will notify owners and dealers will update the Hydraulic Unit-ECU software free of charge. The recall is expected to begin October 16, 2018.

Owners may contact Mitsubishi customer service at (888) 648-7820. Mitsubishi's number for this recall is SR-18-008.