Code No.B1406 Malfunction of Inside Front Impact Sensor (RH)
Code No.B1416 Malfunction of Inside Front Impact Sensor (LH)
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If diagnosis code B1406 or B1416 is set in the SRS-ECU, be sure to diagnose the CAN bus line.
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- When the front impact sensor does not operate
- When the front impact sensor’s property is abnormal
- When the front impact sensor sends an abnormal signal
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- Malfunction of CAN bus line
- Malfunction of front impact sensor (RH) (for diagnosis code B1406) or front impact sensor (LH) (for diagnosis code B1416)
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STEP 1. M.U.T.-III CAN bus diagnostics.
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Use M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting  ).
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STEP 2. Front impact sensor check.
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(1)Check that the negative battery terminal is disconnected. If the negative battery terminal is connected, disconnect it.
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(2)Alternate the front impact sensor (RH) and the front impact sensor (LH), and then install the alternated sensor.
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(3)Connect the negative battery terminal.
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(4)After erasing the diagnosis code memory, check the diagnosis code again.
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(5)Disconnect the negative battery terminal.
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Q.
Is diagnosis code B1406 or B1416 set?
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Replace the SRS-ECU (Refer to ).
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The procedure is complete.
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