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The G and yaw rate sensor outputs the signal to ASC-ECU and AWC-ECU via the special CAN
bus lines (Local CAN).
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This diagnostic trouble code is set if ASC-ECU cannot receive the signal sent from the
G and yaw rate sensor even when the voltage supplied to ASC-ECU is normal.
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- Wiring harness or connector failure in special CAN bus lines (Local CAN)
between ASC-ECU and G and yaw rate sensor.
- G and yaw rate sensor malfunction
- ASC-ECU malfunction
- External noise interference
- Connector disconnected or improperly connected
- Stretched or broken wires
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Required Special Tools:
- MB991958 Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827 M.U.T.-III USB Cable
- MB991910 M.U.T.-III Main Harness A
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Using scan tool MB991958, diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .)
After repairing the CAN bus line, go to Step 3.
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Check if diagnostic trouble code No. U0251, U0440, and U0435 are simultaneously set in
ASC-ECU.
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Q.
Are DTCs U0251, U0440 or U0435 set?
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Perform troubleshooting for the diagnostic trouble code that is set. (Refer to .)
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This diagnosis is complete.
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Q.
Is the check result normal?
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Repair the connector, and then go to Step 8.
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- Open or short circuit check of communication circuit
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Q.
Is the check result normal?
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Repair the wiring harness, and then go to Step 8.
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Replace the G and yaw rate sensor. (Refer to .)
Then go to Step 7.
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Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent
Malfunction .)
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Replace the hydraulic unit (incorporates in ASC-ECU). (Refer to .)
Then go to Step 8.
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The procedure is complete.
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The procedure is complete.
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