[AWD]

DTC U1417 Variant coding value invalid (includes faulty installation) [AWD]

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.
^ If DTC U1417 is set in ASC-ECU, always diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect DTC may be set. In this case, the set DTC is not highly reliable.
^ Before replacing the ECU, ensure that the communication circuit is normal.
^ When DTC U1417 is set in ASC-ECU, the DTC may also be set in ETACS-ECU.
^ When the DTC is set in ETACS-ECU, carry out the diagnosis of the DTC for ETACS-ECU first.
^ When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor.

OPERATION
ASC-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.

DTC SET CONDITIONS
ASC-ECU communicates with ETACS-ECU via CAN bus lines. This DTC is set when the vehicle information received from the ETACS-ECU is invalid.

PROBABLE CAUSES
^ Malfunction of ETACS-ECU
^ Malfunction of engine control module (ECM)
^ ETACS-ECUs have been interchanged between two vehicles.
^ Malfunction of ASC-ECU
^ External noise interference
^ ASC-ECUs have been interchanged between two vehicles.

DIAGNOSIS

Required Special Tools:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827: M.U.T.-III USB Cable
^ MB991910: M.U.T.-III Main Harness A

STEP 1. Using scan tool MB991958, diagnose the CAN bus lines.
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines (Refer to CAN Bus Diagnostic table CAN Bus Diagnostics Table). On completion, go to Step 2.

STEP 2. DTC recheck after resetting CAN bus lines
Q: Is DTC U1417 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. Using scan tool MB991958, other system diagnostic trouble code
Use scan tool to check whether any diagnostic trouble code related to vehicles information is set or not by the ETACS-ECU or engine control module (ECM).
Q: Is the DTC set?
YES: Troubleshoot for the relevant DTC.
NO: Go to Step 4.

STEP 4. ETACS-ECU coding data check
Refer to Coding List.
Vehicle line
OK: LANCER H/B
Transmission
OK: TC-SST
Engine type
OK: 2.OL D4 VVT T/C
Engine power
OK: Normal
Chassis type for A.S.C.
OK: Type 6
Final drive
OK: AWD FF Base
Transfer
OK: ACD
SAS
OK: Present
4WD/AWD
OK: Not present
TCM
OK: Present
ACDAYC
OK: Present
Q: Is the check result normal?
YES: Go to Step 5.
NO: Replace the ETACS-ECU, and then go to Step 7.

STEP 5. Engine control module (ECM) coding data check
Refer to Coding List.
Q: Is the check result normal?
YES: Go to Step 6.
NO: Replace the engine control module (ECM), and then go to Step 7.

STEP 6. Check the part number of ETACS-ECU
Check the part number of ETACS-ECU.
Q: Is the check result normal?
YES: Go to Step 7.
NO: Replace the ETACS-ECU, and then go to Step 7.

STEP 7. Check the part number of ASC-ECU
Check the part number of ASC-ECU.
Q: Is the check result normal?
YES: Go to Step 8.
NO: Replace the hydraulic unit (ASC-ECU), and then go to Step 9.

STEP 8. Check whether the DTC is reset.
Q: Is DTC U1417 set?
YES: Replace the ASC-ECU, and then go to Step 9.
NO: The trouble can be an intermittent malfunction.

STEP 9. Check whether the DTC is reset.
Q: Is DTC U1417 set?
YES: Return to Step 1.
NO: The procedure is complete.