Network, generic

U05A7 Invalid Data Received From Safety Integration Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The Safety Integration Control Module appears in the SAE code catalogue, yet no carmaker explains in public what this unit does or which models carry it; the name suggests a controller that ties several safety functions together. U05A7 is stored by a receiving module that still gets the unit's frames but refuses what they contain. Safety-related signals are normally secured end to end: the AUTOSAR E2E protocol attaches a CRC to detect altered bits, a counter to spot repeated or reordered frames and a data ID so that a wrong sender is recognised. Failing one of these checks is the typical trigger. No manufacturer documents U05A7 or its partner U02A6, which stands for a module that has gone silent. Expect warnings and reduced assistance, not an emissions fault.

Likely causes

Software fault or outdated software in the safety integration module
Module replaced or reprogrammed without matching vehicle configuration
Corrupted frames from wiring, connector or termination faults on the bus
Low supply voltage during start or after battery discharge

Symptoms

  • Warning message about safety or assistance systems
  • Individual assistance functions unavailable
  • Further network codes stored in several modules

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

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

Parts involved

safety integration module

Related codes

U02A6

References: autosar.org, en.wikipedia.org.