Network, generic

U015E Lost Communication With Automated Driving System Interface Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

U015E concerns interface module A, the link that passes commands from an automated driving computer to the base vehicle's brakes, steering and powertrain and reports their state back. Such interfaces belong to the act layer of the sense-think-act chain that Bosch uses to describe automated driving. When its messages stop, the automation computer can no longer command the actuators, so it has to hand control back to the driver or reach a safe stop. No manufacturer documents U015E publicly, and SAE J3016 defines only the automation levels, not the hardware. U015F is interface module B, U015C and U015D are the control modules, U045F flags implausible data from A.

Likely causes

Interface module A without power or ground
Bus or Ethernet connection to the interface damaged or strained
Interface and automation computer on mismatched software
Interface module A internally faulty

Symptoms

  • Automated driving mode cannot be activated
  • Takeover request or controlled stop during automated driving
  • Driver assistance warning in the cluster

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–3,000
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ads interface module acan bus

Related codes

U015FU015CU015DU045F

References: law.cornell.edu, bosch-mobility.com, en.wikipedia.org.