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- A failure may have occurred in the calibration of the G & yaw rate
sensor.
- Some drivers mistake a brake dragging for HSA operation.
- If the suspension is modified, the vehicle posture changes, and the ASC-ECU judges
that the vehicle is on a steep slope and may activate HSA.
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- ASC-ECU malfunction
- Brake drag
- Damaged wiring harness and connectors
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Check if the HSA works on a flat road with one occupant (driver) only in the vehicle.
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Q.
Does the HSA work on a flat road?
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This diagnosis is complete.
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Check the following data list (Refer to ).
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Q.
Is the check result normal?
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Carry out the calibration of the G and yaw rate sensor (Refer to ).
Then go to Step 4.
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Check the brake system for drag.
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Q.
Is the check result normal?
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Repair the brake drag, and then go to Step 4.
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Check if the HSA works on a flat road with one occupant (driver) only in the vehicle.
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Q.
Does the HSA work on a flat road?
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Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
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This diagnosis is complete.
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