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Home >> Toyota >> 2016 >> Camry LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Automatic Transmission (U660E) (Diagnostic Codes (P0500-U0100) & Circuit Tests) (Except Hybrid)) >> Automatic Transaxle System >> DTC U0100: Lost Communication with ECM / PCM "A" [08/2015 - ] >> Description

DTC U0100: Lost Communication with ECM / PCM "A" [08/2015 - ]: Description

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The engine control unit communicates with the TCM using the Controller Area Network (CAN).

If there is a problem in this communication, the TCM sets a DTC.

DTC No. DTC Detection Condition Trouble Area
U0100 Following conditions are met for 1.25 seconds (1 trip detection logic):
  • Engine switch on (IG)
  • Battery voltage is 10.5 V or more
  • No communication between the engine control ECU (ECM) and TCM
  • Harness and connector
  • ECM
  • TCM