Code No.U0184 Audio CAN timeout


caution
  • If the diagnosis code No. U0184 is set, be sure to diagnose the CAN bus line.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION


When the signals from radio and CD player cannot be received, the combination meter sets the diagnosis code No. U0184.

JUDGMENT CRITERIA


With the statuses that the ignition switch is at ON position, system voltage is 10 - 16 V (data from ETACS-ECU), and there is no malfunction to the power supply fuse (IOD fuse), or odometer value is 80.5 km or more, if the communications with radio and CD player cannot be established for 2,500 ms or more, the combination meter determines that a problem has occurred.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 2.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code


Check again if the diagnosis code is set to the radio and CD player.

Q. Is the diagnosis code set?

Troubleshoot the radio and CD player. Refer to .

Go to Step 3.

STEP 3. Check the M.U.T.-III Diagnosis code for other systems


Check if the diagnosis code No. U0184 is set to ETACS-ECU.

Q. Is the diagnosis code set?

Go to Step 4.

Go to Step 5.

STEP 4. Diagnosis code recheck


Check again if the combination meter-related diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the radio and CD player.

A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the combination meter and radio and CD player. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 5. Diagnosis code recheck


Check again if the combination meter-related diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the combination meter.

A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the combination meter and radio and CD player. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)


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