Code No.B1406
Malfunction of G-sensor inside right front impact sensor
Code No.B1416 Malfunction
of G-sensor inside left front impact sensor
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If the diagnosis code B1406
or B1416 is set to SRS-ECU, be sure to diagnose the CAN bus line.
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TROUBLE JUDGEMENT
- Analogue G-sensor in front impact sensor does not operate.
- Characteristics of analogue G-sensor in front impact sensor are abnormal.
- Output of analogue G-sensor in front impact sensor is abnormal.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of right front impact sensor (with code No. B1406)
- Malfunction of left front impact sensor (with code No. 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)A front impact sensor is checked in the following way.
- Replace the front impact sensor with new part.
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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 the diagnosis code set?
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Go to Step 3
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The procedure is complete.
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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)Replace the SRS-ECU with a new one (Refer to ).
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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 the diagnosis code set?
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Return to Step 1.
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The procedure is complete.
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