DTC U1109: ETACS CAN timeout: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line
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 ."
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 CAN bus line found to be normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus line (Refer to DIAGNOSIS ).
STEP 2. Using scan tool (M.U.T.-III), read the ETACS-ECU diagnostic trouble code
Check again if the DTC is stored to the ETACS-ECU.

Q: Is the DTC stored?
1. YES: Diagnose the ETACS-ECU. Then go to Step 4.
2. NO: Go to Step 3.
STEP 3. Using scan tool (M.U.T.-III), read diagnostic trouble code No. U1109 for other system.
Check if the DTC U1109 stored in SRS-ECU, combination meter, A/C-ECU.

Q: Is the DTC stored?
1. YES: Replace the ETACS-ECU (Refer to ETACS-ECU ).
2. NO: Go to Step 4.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is stored to the occupant classification-ECU.
1. Erase the DTC.
2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
3. Check if DTC is stored.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC stored?
1. YES: Replace the front seat cushion cover and pad assembly (Refer to FRONT SEAT ASSEMBLY ).
2. NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).