Code No. C2270: Current Gear Signal Fail
Code No. C2278: ACC/FCM Signal (A/T No Response)


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 gear shifting information from the AT-ECU.

DIAGNOSIS CODE SET CONDITION


If the ACC/FCM-ECU receives no or an invalid gear shifting information from the A/T-ECU, the ECU sets the diagnosis code.
note Diagnosis code No. C2270 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 A/T-ECU (Refer to GROUP 23A - Troubleshooting <A/T>, Diagnosis Function).

Q. Is the diagnosis code set?
Troubleshoot the A/T-ECU diagnosis code (Refer to GROUP 23A - Troubleshooting <A/T>, 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 FCM and UMS ON/OFF switch to turn the FCM system to ON.
(5)On completion, check that the diagnosis code is set again.

Q. Is diagnosis code No. C2270 or C2278 set?
Replace the ACC/FCM-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions).