Active Stability Control System (ASC)
DTC U0100: Engine time-out error
DTC U0101: A/T or CVT time-out error
DTC U0114: AWD time-out error
DTC U0126: Steering wheel sensor time-out error
DTC U0141: ETACS time-out error
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 Controller Area Network (CAN)).
- If diagnostic trouble codes U0100, U0101, U0114, U0126, and U0141 are set in ASC-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnostic trouble code may be set. In this case, the set diagnostic trouble code is not highly reliable.
- Before replacing the ECU, ensure that the communication circuit is normal.
- When the steering wheel sensor is replaced, always carry out calibration to make ASC-ECU learn the neutral point (Refer to Testing and Inspection).
- 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 (Refer to Testing and Inspection, Testing and Inspection and Testing and Inspection).
CIRCUIT OPERATION
ASC-ECU communicates with the engine control module, TCM, AWD-ECU or AWC-ECU the steering wheel sensor, and ETACS-ECU via the CAN bus lines.
DTC SET CONDITIONS
This diagnostic trouble code is set if ASC-ECU cannot receive the signal sent from other ECU for a certain period.
PROBABLE CAUSES
DTC U0100
- Wiring harness or connector failure of CAN bus line
- Engine control module malfunction
- ASC-ECU malfunction
- Connector disconnected or improperly connected
- Stretched or broken wires
DTC U0101
- Wiring harness or connector failure of CAN bus line
- Malfunction of TCM
- ASC-ECU malfunction
- Connector disconnected or improperly connected
- Stretched or broken wires
DTC U0114
- Wiring harness or connector failure of CAN bus line
- AWD-ECU or AWC-ECU malfunction
- ASC-ECU malfunction
- Connector disconnected or improperly connected
- Stretched or broken wires
DTC U0126
- Wiring harness or connector failure of CAN bus line
- Steering wheel sensor malfunction
- ASC-ECU malfunction
- Connector disconnected or improperly connected
- Stretched or broken wires
DTC U0141
- Wiring harness or connector failure of CAN bus line
- Malfunction of ETACS-ECU
- ASC-ECU malfunction
- Connector disconnected or improperly connected
- Stretched or broken wires
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. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q. Is the check result normal?
YES Go to Step 2.
NO Repair the CAN bus lines CAN Bus Diagnostics Chart).
On completion, go to Step 3.
STEP 2. Check whether the DTC is reset.
Q. Is DTC U0100, U0101, U0114, U0126 or U0141 set?
YES Go to Step 3.
NO The procedure is complete.
STEP 3. Connector check: ASC-ECU connector
Q. Is the check result normal?
YES Go to Step 4.
NO Repair the defective connector. Then go to Step 4.
STEP 4. M.U.T.-III other system DTC
Use scan tool to check that other diagnostic trouble code is set in the ECU corresponding to the relevant diagnosis.
Q. Is other DTC set?
YES Troubleshoot for the relevant diagnostic trouble code.
NO Go to Step 5.
STEP 5. ETACS-ECU coding data check
Programming and Relearning.
Vehicle line
OK: OUTLANDER
Transmission
OK (A/T): 6AT
OK (CVT): CVT
Engine type
OK (2.4L engine): 2.4L D4 MPI VVT
OK (3.0L engine): 3.0L S4 MIVEC
Engine power
OK: Normal
Chassis type for A.S.C.
OK : Type 2
Final drive
OK (FWD): Front Drive
OK (AWD): 4WD FF Base
Front differential
OK (except S-AWC): Open
OK (S-AWC): ELSD
Transfer
OK (FWD): FWD
OK (AWD): ECC
SAS
OK: Present
4WD/AWD
OK (FWD): Not present
OK (AWD): Present
TCM
OK: Present
ACDAYC
OK: Not present
Q. Is the check result normal?
YES Go to Step 6.
NO Replace the ETACS-ECU Electronic Time and Alarm Control System (ETACS)-ECU Removal and Installation), and then go to Step 6.
STEP 6. Check whether the DTC is reset.
Erase the DTCs.
Q. Is DTC U0100, U0101, U0114, U0126 or U0141 set?
YES Replace the hydraulic unit (integrated with ASC-ECU) (Refer to Service and Repair).
NO The procedure is complete.