DTC C1582: Assist Map Number Mismatch [08/2020 - ]: Procedure

1. Check for DTCs.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

   Result

   Result	Proceed to
   CAN communication system DTCs are not output.	A
   CAN communication system DTCs are output.	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

A 

See step  2

1. Check if the part below has been replaced with an incorrect part in the past.

   Related Part	ECM
   	Skid control ECU (Brake actuator assembly)
   	AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

   NOTE:

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

   • ECM

     For 2GR-FKS: Refer to REMOVAL [10/2019 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

     For A25A-FKS: Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   • Skid control ECU (Brake actuator assembly)

     Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

     Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

2. When DTC C1582 is output and parts have not been exchanged, replace the power steering ECU (rack and pinion power steering gear assembly) as it may have an internal malfunction.
   NOTE:

   If the rack and pinion power steering gear assembly has been replaced, perform assist map writing.

   Refer to CALIBRATION [06/2018 - ]

   Result

   Result	Proceed to
   The related part has an incorrect part number.	A
   The related part has the correct part number, or a related part and rack and pinion power steering gear assembly have not been replaced.	B

Result: 

B 

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

A 

See step  3

1. Replace the related part with one that has the correct part number.
   • ECM

     For 2GR-FKS: Refer to REMOVAL [10/2019 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

     For A25A-FKS: Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   • Skid control ECU (Brake actuator assembly)

     Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

     Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check for DTCs.

   Chassis > EMPS > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output.	A
   DTCs are output.	B

Result: 

A 

END 

Result: 

B 

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ]