Code No.U0184 Audio CAN timeout
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- 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.
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FUNCTION
When the signals from 6-disc CD changer and AM/FM radio cannot be received, the SRS-ECU sets the diagnosis code No. U0184.
TROUBLE JUDGMENT
Because of the CAN-B bus circuit malfunction, if SRS-ECU becomes unable to perform the normal data transmission, SRS-ECU determines that an abnormality is present.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of SRS-ECU
- Malfunctions of 6-disc CD changer and AM/FM radio
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 6-disc CD changer and AM/FM radio diagnosis code
Check again if the diagnosis code is set to the 6-disc CD changer and AM/FM radio.
Q.
Is the diagnosis code set?
Troubleshoot the 6-disc CD changer and AM/FM radio (Refer to GROUP 54A - radio and tape player/radio and CD player - Troubleshooting ).
Go to Step 3.
STEP 3. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the SRS-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the SRS-ECU (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).