C1581
DTC C1581 Assist Map Number Un-WritingDESCRIPTION
This DTC is output when one of the following occurs: 1) the power steering ECU selects assist map according to the vehicle specifications from the suspension control ECU, but the assist map is not written in the power steering ECU, or 2) the power steering ECU determines that the vehicle specifications and the assist map are inconsistent.
C1581:
INSPECTION PROCEDURE