C1581

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Hatchback): C1581: Assist Map Number Un-Writing
C1581 - Assist Map Number Un-Writing

DESCRIPTION

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





INSPECTION PROCEDURE

NOTICE:
* If the power steering ECU assembly has been replaced, perform the torque sensor zero point calibration and assist map writing Programming and Relearning.

PROCEDURE

1. PERFORM ASSIST MAP WRITING

(a) Perform assist map writing Programming and Relearning.

NEXT -- Continue to next step.

2. CONFIRM DTC

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC C1581 is not output.

HINT
DTC C1581 will be cleared after the assist map is written.

NG -- CHECK CAN COMMUNICATION SYSTEM

OK -- END

3. CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs of the CAN communication system.





Result





B -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How To Proceed With Troubleshooting (from 07/2011)

C -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How To Proceed With Troubleshooting (from 07/2011)
A -- Continue to next step.

4. CHECK ECM

(a) Check if an ECM that complies with the vehicle specifications is installed.

OK:

The ECM that complies with vehicle specifications is installed.

NG -- REPLACE ECM Removal (from 07/2011)

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal (from 07/2011)