DTC B1428: Side impact sensor (front: RH) communication error; DTC B1429: Side impact sensor (front: RH) communication impossible: 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. 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 the DTC stored?
1. YES: Go to Step 3.
2. NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
STEP 3. Right side impact sensor check.
1. Check that the negative battery terminal is disconnected. If the negative battery terminal is connected, disconnect it.
2. Alternate the right side impact sensor and left side impact sensor, and then install the alternated sensors.
3. Connect the negative battery terminal.
4. After erasing the DTC memory, check the DTC again.
5. Disconnect the negative battery terminal.
Q: Is DTC B1428 or B1429 stored?
1. YES: Replace the side impact sensor (front: RH) with a new one (Refer to SIDE IMPACT SENSOR ).
2. NO: Go to Step 4.
STEP 4. Check of short to power supply, short to ground, and open circuit in SSR-, SSR+ line in between SRS-ECU connector and side impact sensor (front: RH) connector.
Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Repair the connectors or harness wires.
STEP 5. Check whether the DTC is stored again.
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 DTC B1428 or B1429 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 ).