Code No.U0151 SRS-ABG CAN timeout


caution
  • If diagnosis code No. U0151 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 SRS-ECU cannot be received, the combination meter sets diagnosis code No. U0151.

JUDGEMENT CRITERIA


With the ignition switch is at ON position, diagnosis code No. U1190 is not set and diagnosis code No. U1195 is not set, if the communication with SRS-ECU cannot be established for 2500 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 ). Repair the CAN bus line and go to Step 5.

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


Check that the SRS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Diagnose the SRS-ECU (Refer to GROUP 52B - Troubleshooting ).

Go to Step 3.

STEP 3. Check whether the diagnosis code is set again.


Check again if the diagnosis code is set in the combination meter.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is set again.

Q. Is the diagnosis code set?

Replace the SRS-ECU and then go to Step 4.

A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the SRS-ECU and the combination meter (Refer to GROUP 00 - How to use troubleshooting/Inspection Service Points ).

STEP 4. Check whether the diagnosis code is set again.


Check again if the diagnosis code is set in the combination meter.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is set again.

Q. Is the diagnosis code set?

Replace the combination meter. and then go to Step 5.

A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the SRS-ECU and the combination meter (Refer to GROUP 00 - How to use troubleshooting/Inspection Service Points ).

STEP 5. Check whether the diagnosis code is set again.


Recheck if the diagnosis code is set in the combination meter.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is set again.

Q. Is the diagnosis code set?

Return to Step 1.

The procedure is complete.