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System Description: System: Fail-safe

When an error occurs in the hydraulic pump electric power steering system, fail-safe brings the system to a halt (manual steering) or restricted (constant steering assist level) state. When the system is in a halt state, fail-safe turns ON the Hydraulic Pump Electric Power Steering Warning Lamp to warn the driver that the hydraulic pump electric power steering system is in the manual steering state.

DTC

Fail-safe condition

C1143

Certain steering assist force

C1601

Manual steering state

C1602

Manual steering state

C1606

Manual steering state

C1607

Certain steering assist force

C1608

Manual steering state

U1000

Normal control

NOTE: If the cause is in a different ECU, the state changes to fixed steering assist force.