Code No. C1607 Abnormality in ASC-ECU


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 - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION
ASC-ECU always monitors the inside of ECU while the system is working. If the ECU detects any faults, it sets this diagnosis code.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when ASC-ECU has malfunction.

PROBABLE CAUSES
ASC-ECU malfunction

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 - CAN Bus Diagnostics Table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines
Erase the diagnosis code.

Q. Is the diagnosis code No.C1607 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ). Then go to Step 3.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).

STEP 3. Diagnosis code recheck after resetting CAN bus lines
Erase the diagnosis code.

Q. Is the diagnosis code No.C1607 set?
Return to Step 1.
This diagnosis is complete.