C1617

DTC C1617: AWC CAN Main Data System (data not received)

CAUTION:
^ If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code 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 various data from ECU via CAN communication.

DIAGNOSTIC TROUBLE CODE SET CONDITIONS
The code is set when the signal necessary for AWC control cannot be received.

PROBABLE CAUSES
^ The CAN bus line is defective.
^ Malfunction of engine control module
^ Malfunction of ASC-ECU
^ Malfunction of steering wheel sensor
^ Malfunction of the ETACS-ECU
^ Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.

Q: Is DTC No. C1617 set?
YES: Go to Step 3.
NO: This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check if the AWC-related DTC No. U0100, U0101, U0121, U0126, or U0141 is set.

Q: Is the DTC set?
YES: Perform the relevant troubleshooting.
NO: Go to Step 4.

STEP 4. Scan tool diagnostic trouble code
^ Check the engine diagnostic trouble code.
^ Check the ASC diagnostic trouble code.
^ Check the ETACS diagnostic trouble code.

Q: Is the DTC set?
YES: Perform the relevant troubleshooting.
NO: Go to Step 5.

STEP 5. Check whether the DTC is reset.

Q: Is DTC No. C1617 set?
YES: Replace the AWC-ECU. Then go to Step 6.
NO: Intermittent malfunction.

STEP 6. Check whether the DTC is reset.

Q: Is DTC No. C1613 set?
YES: Return to Step 1.
NO: This diagnosis is complete.