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Home >> Lexus >> 2006 >> IS 250 RWD, Automatic >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Engine Immobilizer >> Engine Immobilizer System >> DTC B2785, B2786, B2789: Communication Malfunction between ECUs Connected by LIN; No Response from Steering Lock ECU; No Response from ID BOX >> Description

DTC B2785, B2786, B2789: Communication Malfunction between ECUs Connected by LIN; No Response from Steering Lock ECU; No Response from ID BOX: Description

This DTC is output when LIN communication from the certification ECU stops for a certain amount of time.

DTC DETECTION CONDITION - TROUBLE AREA TABLE

DTC No. DTC Detection Condition Trouble Area
B2785 LIN communication from certification ECU stops for a certain amount of time
  • Open or short in wire harness between ECUs
  • Wire harness
  • Certification ECU
  • ID code box
  • Power source control ECU
  • Steering lock ECU
B2786 Certification ECU does not receive LIN communication from steering lock ECU for 10 seconds.
  • Wire harness
  • Certification ECU
  • Steering lock ECU
B2789 Certification ECU does not receive LIN communication from ID code box
  • Open or short in wire harness between ECUs
  • Wire harness
  • Certification ECU
  • ID code box