Code No.U0155 Meter CAN timeout


caution
  • If the diagnosis code No. U0155 is set, be sure to diagnose the CAN bus line.
  • When replacing the radio and CD player, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION
If the signal from combination meter cannot be received, the radio and CD player sets the diagnosis code No. U0155.

JUDGEMENT 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 communication with combination meter cannot be established for 2,500 ms or more, the radio and CD player determines that a problem has occurred.

PROBABLE CAUSES

  • Malfunction of CAN bus line
  • Malfunction of combination meter
  • Malfunction of radio and CD player

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 combination meter.

Q. Is the diagnosis code set?
Troubleshoot the combination meter (Refer to ), and then go to Step 3.
Go to Step 3.

STEP 3. Check the M.U.T.-III Diagnosis code for other systems
Check if the diagnosis code No. U0155 is set to A/C-ECU.

Q. Is the diagnosis code set?
Go to Step 4.
Go to Step 5.

STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set to the radio and CD player.
(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 radio and CD player and the combination meter. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 5. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the radio and CD player.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3)Check if 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 radio and CD player and the combination meter. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)