DTC U0121[00] EHCU Signal Timeout (Radar Sensor (Right))

1. DTC U0121[00] description

The radar sensor (Right) communicates the control information with the EHCU via the Chassis CAN communication circuit and radar sensor (Left). If the radar sensor (Right) cannot obtain the control information sent from the EHCU, the DTC is set.

2. Condition for setting DTC U0121[00]

Condition for running the DTC

  • The ignition voltage is 10.0 to 16.0 V.
  • 5 seconds or more have passed with the ignition switch ON.
  • DTC U0055[88] is not set.

Refer to "75.Driver Assistance System 10W.Troubleshooting(Radar Sensor (Right)) DTC U0055[88] Chassis CAN bus Off".

Condition for setting the DTC

  • The radar sensor (Right) detects that the control information sent from the EHCU cannot be obtained.

3. Action taken when DTC U0121[00] sets

  • The BSM OFF indicator light illuminates.
  • All of the functions are deactivated.
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