DTC U0401-53, U0401-92 (Millimeter Wave Radar)

DTC U0401-53  : Temporary stop of Integrated Driver Support System (Received stop request by PGM-FI System)

DTC U0401-92  : Temporary stop of Integrated Driver Support System (Rejected control request by PGM-FI System)

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If these DTC are recorded, the following is suspected:
• • ACC operation is inhibited this way when there is a transmission malfunction, transmission and transmission fluid temperatures are too high, or if the PCM determines ACC is still active when the brake pedal is pressed.
  • The brake pedal position switch is failed or out of adjustment, or the brake pedal was pressed lightly while driving. (electric brake booster equipped models)
  • If this sets due to transmission fluid temperature, a warning will also be displayed in the MID.
• If these DTC are recorded, some of the integrated driver support system functions are temporarily canceled but it is not a failure.
• When the PCM becomes ready to receive a control request from the millimeter wave radar and the multipurpose camera unit, the temporarily cancelled integrated driver support system functions are re-activated.
• The functions of the integrated driver support system that will be temporarily canceled when these DTC are recorded can be confirmed with the DTC troubleshooting index .

DTC (IDAS)

1. DTC check

   -1. Turn the vehicle to the ON mode, then wait for at least 6 seconds.

   -2. Check for DTCs with the HDS.

   DTC Description	DTC

   Is there any DTC(s) other than DTC U0401-53 or U0401-92?

   YES 

   Perform a troubleshooting for the recorded DTC.

   NO 

   Clear the DTC with the HDS and explain to the customer that it is not a failure.