[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
55 -HEATER, AIR CONDITIONER AND VENTILATION > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > U0184 Audio CAN Time-out
Code No. U0184: Audio CAN time-out
 
 
caution
  • If diagnosis code No.U0184 is set in the A/C controller assembly (A/C-ECU), diagnose the CAN main bus line.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.
 
 
TROUBLE JUDGEMENT
The A/C controller assembly (A/C-ECU) receives air conditioner control-related signals from the radio and CD player via the CAN bus lines. If the ECU cannot receive any of the air conditioner control-related signals from the radio and CD player, diagnosis code U0184 will be set.
 
 
 
COMMENTS ON TROUBLE SYMPTOM
Current trouble
  • Connector(s) or wiring harness in the CAN bus lines between the radio and CD player and the A/C controller assembly (A/C-ECU), the power supply system to the radio and CD player, the radio and CD player itself, or the A/C controller assembly (A/C-ECU) may be defective.
Past trouble
  • Carry out diagnosis with particular emphasis on connector(s) or wiring harness in the CAN bus lines between the A/C controller assembly (A/C-ECU) and the radio and CD player, and the power supply system to the radio and CD player. For diagnosis procedures, refer to "How to treat past trouble" (Refer to GROUP 00 - How to Treat Past Trouble ).
    noteFor a past trouble, you can not find it by the M.U.T.-III SE CAN bus diagnostics even if there is any failure in CAN bus lines. In this case, refer to GROUP 00, How to Cope with Intermittent Malfunction and check the CAN bus lines. You can narrow down the possible cause of the trouble by referring to the diagnosis code, which is set regarding the CAN communication-linked ECUs (Refer to GROUP 54C - CAN Bus Line Diagnostic Flow ).
    cautionIf the ignition switch is turned to the ON position without starting the engine, diagnosis code U0184 (past trouble) may be set in the A/C controller assembly (A/C-ECU) after three minutes.
 
 
 
PROBABLE CAUSES
  • Damaged wiring harness or connectors
  • Malfunction of the radio and CD player
  • Malfunction of the A/C controller assembly (A/C-ECU)
 
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics
Use the M.U.T.-IIISE to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C, Troubleshooting ).
 
STEP 2. M.U.T.-IIISE other system diagnosis code
Check if diagnosis code is set in the radio and CD player.
Is the diagnosis code set?
Diagnose the radio and CD player. Refer to GROUP 54A - Radio and CD Player .
Go to Step 3.
 
STEP 3. M.U.T.-IIISE other system diagnosis code
Check if a diagnosis code, which relates to CAN communication-linked systems below, is set.
  • ETACS-ECU
    U0184: Audio-related time-out diagnosis code
Is the diagnosis code set?
Go to Step 4.
Go to Step 5.
 
STEP 4. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: "LOCK" (OFF) to "ON"
(3) Check if the diagnosis code is set.
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 radio and CD player and the A/C controller assembly (A/C-ECU) (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
 
STEP 5. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: "LOCK" (OFF) to "ON"
(3) Check if the diagnosis code is set.
Is the diagnosis code set?
Replace the A/C controller assembly (A/C-ECU).
A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the radio and CD player and the A/C controller assembly (A/C-ECU) (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).