DTC U1800[86] ECM Communication Interruption/Data Malfunction (eCall unit)

1. DTC U1800[86] description

The eCall unit communicates the control information with the ECM via the CAN communication circuit. If the eCall unit cannot receive the control information sent from the ECM, the DTC is set.

2. Condition for setting DTC U1800[86]

Condition for running the DTC

  • The ignition switch is ON.
  • The ignition voltage is 9 V or more.

Condition for setting the DTC

  • The eCall unit detects that the control information sent from the ECM cannot be received for 5 seconds or more.

3. Action taken when DTC U1800[86] sets

  • The indicator light (red) illuminates.
  • An alarm sounds from the speaker.
  • Current and past failures are set.
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