DTC B1406: Malfunction of front impact sensor (RH); DTC B1416: Malfunction of front impact sensor (LH): 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. Check the front impact sensor (RH).
1. Check that the negative battery terminal is disconnected. If the negative battery terminal is connected, disconnect it.
2. Alternate the front impact sensor (RH) and the front impact sensor (LH), and then install the alternated sensor.
3. Connect the negative battery terminal.
4. After erasing the DTC memory, check the DTC again.
5. Disconnect the negative battery terminal.
Q: Is either DTC B1406 or B1416 stored?
1. YES: Replace the front impact sensor with a new one (Refer to FRONT IMPACT SENSORS ).
2. NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is stored.
1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is stored.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is either DTC B1406 or B1416 stored?
1. YES: Replace SRS-ECU (Refer to SRS CONTROL UNIT (SRS-ECU) ).
2. NO: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).