DTC C1581: Assist Map Number Un-Writing: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The power steering ECU assembly outputs this DTC when it determines that the assist map is not written in the ECU
HINT:
The assist map is data written in the power steering ECU assembly to control the degree of assistance The assist map is selected based on the vehicle's specified communication data (designation and grade package information).
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Item | Trouble Area |
|---|---|---|
| C1581 | Assist map is not written in the power steering ECU assembly |
|