Code No. C2275: Rear Diff. Lock State Signal


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
  • When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ).

OPERATION


The ACC/FCM-ECU receives information on the rear differential lock from the transfer-ECU.

DIAGNOSIS CODE SET CONDITION


The ACC/FCM-ECU sets the diagnosis code when it receives an invalid information from the transfer-ECU.
note A diagnosis code is not set as a historic fault.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.
Check if the diagnosis code is set in the transfer-ECU (Refer to GROUP 23A - Troubleshooting <SS4 II>, Diagnosis Function).

Q. Is the diagnosis code set?
Troubleshoot the transfer-ECU diagnosis code (Refer to GROUP 23A - Troubleshooting <SS4 II>, Diagnosis Code Chart).
Go to Step 3.

STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the ACC/FCM-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Start the engine.
(4)Press the ACC ON/OFF switch to turn the ACC system to ON.
(5)On completion, check that the diagnosis code is set again.

Q. Is diagnosis code No. C2275 set?
Replace the ACC/FCM-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).