2018 / ECLIPSE CROSS / EC - Workshop Manual
35 -SERVICE BRAKES > 35C-ACTIVE STABILITY CONTROL SYSTEM (ASC) > TROUBLESHOOTING<ASC-ECU><ASC-ECU> > DIAGNOSIS CODE PROCEDURES > CODE NO. U0440: Implausible AWC data<Vehicles with S-AWC><Vehicles with S-AWC>
Code No.U0440: Implausible AWC Data
| 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
 ). - If diagnosis code No.U0440 is set in ASC-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnosis code may be set. In this case, the set diagnosis code is not highly reliable.
- Before replacing the ECU, ensure that the communication circuit is normal.
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OPERATION
S-AWC related signals are sent or received to and from between AWC-ECU and engine-ECU via CAN bus lines.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when the S-AWC malfunction has been detected.
PROBABLE CAUSES
- S-AWC system malfunction
- Engine-ECU malfunction
- ASC-ECU malfunction
- External noise interference
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnosis
STEP 2. Check whether the diagnosis code is set again.
Is Code No.U0440 set?
Go to Step 3.
The procedure is complete.
STEP 3. M.U.T.-IIISE other system diagnosis code
Use M.U.T.-IIISE to check that other diagnosis code is set in the ECU corresponding to the relevant diagnosis.Is other diagnosis code set?
Troubleshoot for the relevant diagnosis code. Go to Step 4.
STEP 4. Check whether the diagnosis code is set again.
