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DTC C1615: Brake Control Prohibited Request
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. 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 CONDITIONS
The DTC is set when brake control prohibition request is received from ASC-ECU.
 
 
PROBABLE CAUSES
  • Malfunction of ASC-ECU
  • Malfunction of AWC-ECU

 
 
DIAGNOSIS
STEP 1. Scan tool (M.U.T.-IIISE) CAN bus diagnostics.
Use scan tool (M.U.T.-IIISE) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ).
 
STEP 2. Scan tool (M.U.T.-IIISE) DTC.
Check the ASC DTC (Refer to GROUP 35C - Diagnosis, Diagnostic Trouble Code Chart ).
Is the DTC set?
Perform the relevant troubleshooting.
Go to Step 3.
 
STEP 3. scan tool (M.U.T.-IIISE) DTC.
Check other AWC DTC (Refer to ).
Is the DTC set?
Perform the relevant troubleshooting.
Go to Step 4.
 
STEP 4. Check whether the DTC is set again.
Is the DTC C1615 set?
Replace the AWC-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).