Code No.U0151 SRS-ABG CAN timeout


caution
  • If the diagnosis code No. U0151 is set, be sure to diagnose the CAN bus line.
  • When replacing the CAN box unit, always check that the communication circuit is normal. (Check that the voltage is 10 V or more.)

DIAGNOSTIC FUNCTION


If the signal from SRS-ECU cannot be received, the CAN box unit sets the diagnosis code No. U0151.

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 SRS-ECU cannot be established for 2,500 ms or more, the CAN box unit 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 ).

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


Check again if the diagnosis code is set to the SRS-ECU.

Q. Is the diagnosis code set?

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

Go to Step 3.

STEP 3. Check the M.U.T.-III Diagnosis code for other systems


Check if the diagnosis code No. U0151 is set to combination meter.

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 CAN box unit.
(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 SRS-ECU.

A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the CAN box unit and the SRS-ECU. (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 CAN box unit.
(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 CAN box unit.

A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the CAN box unit and the SRS-ECU. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)


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