Code No. U0164: A/C CAN time-out


caution
  • If diagnosis code No. U0164 is set, be sure to diagnose the CAN bus line.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION


If the signal from A/C-ECU cannot be received, the electric tailgate control unit sets diagnosis code No. U0164.

JUDGMENT CRITERIA


With the statuses that the ignition switch is at ON position, system voltage is 10 to 16 V (data from ETACS-ECU), and there is no malfunction to the power supply fuse, or odometer value is 80.5 km or more, if the communication with A/C-ECU cannot be established for 2,500 ms or more, the electric tailgate control unit determines that a problem has occurred.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


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


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

Q. Is the check result normal?

Go to Step 2.

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

STEP 2. M.U.T.-III diagnosis code for other systems


Check if the A/C-ECU-related diagnosis code is set.

Q. Is the diagnosis code set?

Perform troubleshooting for A/C-ECU. (Refer to GROUP 55 - Troubleshooting .)

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code


Check if the diagnosis code No. U0164 is set to the KOS-ECU, OSS-ECU, combination meter, ETACS-ECU, MMCS or radio and CD player.

Q. Is the diagnosis code set?

Go to Step 4.

Go to Step 5.

STEP 4. Check whether the diagnosis code is reset.


Check again if the electric tailgate control unit sets a diagnosis code.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?

Replace the radio and CD player.

An intermittent malfunction may be present. (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 electric tailgate control unit sets a diagnosis code.
(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 electric tailgate control unit.

An intermittent malfunction may be present. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)