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Home >> Toyota >> 2017 >> Highlander LE Plus, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (UA80F) - Diagnostic Codes (P0795-12 - U1103-87) (Except Hybrid) >> Automatic Transaxle System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [11/2016 - ] >> Description

DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [11/2016 - ]: Description

The engine control unit and transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit using CAN communication.

If there is a problem in this intercommunication, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U010087 Lost Communication with ECM/PCM "A" Missing Message 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
  1. The ignition switch is ON and battery voltage is 9.5 V or more.
  2. No intercommunication between engine control unit and transmission control unit
  3. 1.25 seconds or more
  4. 1-trip detection logic
 ECM Comes on DTC stored SAE Code: U0100
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