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Certification ECU Communication Stop Mode [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
Detection Item Symptom Trouble Area
Certification ECU Communication Stop Mode Either condition is met:
  • "Certification (Smart)" is not displayed on the CAN Bus Check screen of the Techstream. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
  • Communication system DTCs (DTCs that start with U) that correspond to "Certification ECU Communication Stop Mode" in "DTC Combination Table" are output. Refer to DIAGNOSIS SYSTEM [08/2013 - ]
  • Certification ECU (Smart key ECU assembly) branch line or connector
  • Power source circuit of certification ECU (smart key ECU assembly)
  • Certification ECU (Smart key ECU assembly) ground circuit
  • Certification ECU (Smart key ECU assembly)
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