DTC U0154: Occupant Classification-ECU 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 occupant classification-ECU diagnostic trouble code.
Check if the DTC is stored in the occupant classification-ECU.

Q: Is the DTC stored?
1. YES: Carry out troubleshooting of the occupant classification-ECU or the occupant classification sensor system (Refer to DIAGNOSTIC TROUBLE CODE CHART < Occupant classification-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. U0154 for other system.
Check if DTC U0154 is stored in ETACS-ECU, combination meter, A/C-ECU.

Q: Is the DTC stored?
1. YES: Replace the passenger seat cushion frame assembly (Refer to FRONT SEAT ASSEMBLY ).
2. NO: Go to Step 4.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the SRS-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 SRS-ECU.
2. NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).