DTC C1581: Assist Map Number Un-Writing [07/2015 - ]: Procedure

1. Perform assist map writing. Refer to CALIBRATION [07/2015 - ]
2. Check for DTCs. Refer to DTC CHECK / CLEAR [07/2015 - ]
   RESULT
   
   

   Result	Proceed to
   DTC C1581 is output.	A
   DTC C1581 is not output.	B

   NOTE:

   DTC C1581 is cleared after the assist map is written.

Result:  B

B 

END 

Result:  A

A 

See step  2

1. Check for DTCs. Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] for with Central Gateway ECU, Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] for without Central Gateway ECU
   RESULT
   
   

   Result	Proceed to
   DTCs are not output.	A
   DTCs are output (w/ Central Gateway ECU).	B
   DTCs are output (w/o Central Gateway ECU).	C

Result:  B

B 

GO TO CAN COMMUNICATION SYSTEM (w/ Central Gateway ECU) 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

Result:  C

C 

GO TO CAN COMMUNICATION SYSTEM (w/o Central Gateway ECU) 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

Result:  A

A 

See step  3

1. Check if any of the parts listed below have been replaced with an incorrect part in the past.

   Related Part	ECM
   	Hybrid vehicle control ECU assembly
   	Main body ECU (Multiplex network body ECU)
   	Skid control ECU (Brake booster with master cylinder assembly)

   NOTE:

   When removing a related part to check it, be sure to follow the appropriate procedures and precautions.

   • Refer to the following procedures to remove the ECM. Refer to REMOVAL [07/2015 - ]
   • Refer to the following procedures to remove the hybrid vehicle control ECU assembly. Refer to REMOVAL [07/2015 - ]
   • Refer to the following procedures to remove the main body ECU (multiplex network body ECU). Refer to REMOVAL [07/2015 - ]
   • Refer to the following procedures to remove the skid control ECU (brake booster with master cylinder assembly). Refer to PROCEDURE - Step 17

   HINT: 

   • DTC C1581 is stored when a part with an incorrect part number is installed for the related parts listed above.
   • When DTC C1581 is output when parts have not been exchanged, replace the power steering ECU assembly as it may have an internal malfunction.
   RESULT
   
   

   Result	Proceed to
   All installed related parts have correct part number	A
   Part with incorrect part number is installed	B

Result:  A

A 

REPLACE POWER STEERING ECU ASSEMBLY 

Refer to REMOVAL [07/2015 - ]

Result:  B

B 

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER