C1581

POWER STEERING: POWER STEERING SYSTEM: C1581: Assist Map Number Un-Writing

DTC C1581 - Assist Map Number Un-Writing

DESCRIPTION

The power steering ECU outputs this DTC when it determines that the assist map is not written in the ECU.






INSPECTION PROCEDURE
NOTE: If the steering column or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration .

PROCEDURE

1. PERFORM ASSIST MAP WRITING
(a) Turn the ignition switch to ON.
(b) Wait for 1 second or more.
(c) Check for DTCs.
HINT: Approximately 1 second after turning the ignition switch ON, the assist map writing is automatically performed. After the automatic assist map writing, DTC C1581 is erased.

OK:
C1581 is not output.
NG -- CHECK DTC (CAN COMMUNICATION SYSTEM)
OK -- END (COMPLETION OF ASSIST MAP WRITING RETURNS SYSTEM TO NORMAL)
2. CHECK DTC (CAN COMMUNICATION SYSTEM)
(a) Check for DTCs.
OK:
DTC is not output.
NG -- GO TO CAN COMMUNICATION SYSTEM
OK -- REPLACE POWER STEERING ECU