DTC U0100: Engine ECU CAN timeout; DTC U0114 AWD-ECU CAN timeout; DTC U0126 SAS CAN timeout; DTC U0141 ETACS-ECU CAN timeout: Diagnosis

STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics
CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) SEALANT ."
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result normal?

YES: Go to Step 3.

NO: Repair the CAN bus lines (Refer to - CAN BUS DIAGNOSTICS TABLE ). On completion, go to Step 2.
STEP 2. DTC recheck after resetting CAN bus lines
1. Erase the DTC.
2. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
3. Check if the DTC is set.
Q: Is DTC U0100, U0114, U0126 or U0141 set?

YES: Go to Step 3.

NO: This diagnosis is complete.
STEP 3. Scan tool (M.U.T.-III) DTC
Use scan tool (M.U.T.-III) to check if the same DTC (time-out) is set in the other ECU.

Q: Is any DTC set?

YES (DTC U0100 is set): Replace the ECM (Refer to - ENGINE CONTROL MODULE (ECM) <2.4 L Engine>, - ENGINE CONTROL MODULE (ECM) <3.0 L Engine>), and then go to Step 4.

YES (DTC U0114 is set): Replace the AWD-ECU (Refer to - Troubleshooting/INSPECTION CHART FOR DTC ) <Vehicles without S-AWC> or AWC-ECU (Refer to - Troubleshooting/INSPECTION CHART FOR DTC <CVT (Vehicles with S-AWC)> or - Troubleshooting/INSPECTION CHART FOR DTC <A/T (Vehicles with S-AWC)>), and then go to Step 4.

YES (DTC U0126 is set): Replace the steering wheel sensor (Refer to --> STEERING WHEEL SENSOR ), and then go to Step 4.

YES (DTC U0141 is set): Replace the ETACS-ECU (Refer to - ETACS ), and then go to Step 4.

NO (No DTC is set.): Go to Step 4.
STEP 4. Check whether the DTC is set again.
1. Erase the DTC.
2. Turn the ignition switch from the LOCK (OFF) position to the ON position.
3. Check if the DTC is set.
Q: Is DTC U0100, U0114, U0126 or U0141 set?

YES: Replace the EPS-ECU (Refer to ELECTRIC POWER STEERING CONTROL UNIT (EPS-ECU) ). Then go to Step 5.

NO: Intermittent malfunction (Refer to - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
STEP 5. Check whether the DTC is set again.
1. Erase the DTC.
2. Turn the ignition switch from the LOCK (OFF) position to the ON position.
3. Check if the DTC is set.
Q: Is DTC U0100, U0114, U0126 or U0141 set?

YES: Return to Step 1.

NO: This diagnosis is complete.