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DTC C1623: Brake Control Abnormality
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
AWC-ECU receives brake control signal from ASC-ECU via the CAN communication.
 
 
DTC SET CONDITION
This DTC is stored when the abnormality below is detected:
  • The diagnostic trouble code will be stored when the brake control operates for a prolonged period.
 
 
PROBABLE CAUSES
  • Malfunction of AWC-ECU

 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
Use scan tool (M.U.T.-III) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ). After repairing the CAN bus line, go to Step 2.
 
STEP 2. Check whether the DTC is stored again.
Is DTC No.C1623 stored?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Scan tool (M.U.T.-III) DTC.
Check other AWC diagnostic trouble code. (Refer to .)
Is the DTC stored?
Perform the relevant troubleshooting.
Go to Step 4.
 
STEP 4. Check whether the DTC is stored again.
Is DTC No.C1615 stored?
Replace the AWC-ECU (Refer to ). Then go to Step 5.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
 
STEP 5. Check whether the DTC is stored again.
Is DTC No.C1615 stored?
Replace the AWC-ECU (Refer to ). Then return to step 1.
This diagnosis is complete.