POWER STEERING SYSTEM, Diagnostic DTC:C1581

DESCRIPTION

This DTC will be stored if the power steering ECU (rack and pinion power steering gear assembly) determines that the assist map is not written in the ECU.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   PERFORM ASSIST MAP WRITING

   
   

   1. Perform assist map writing.

      
      
      1. Chassis > EMPS > Utility

         Tester Display
         Signal Check

      2. 
         
         1. 
            
      3. 
         
         10. 
             

   2. Check for DTCs.

      
      
      1. Chassis > EMPS > Trouble Codes
      2. 
         
      3. 
         

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

   
   
   • AClick here
   • B

     END

2. Click here

   CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Check for DTCs.

      Click here

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

   
   
   • AClick here
   • B

     GO TO CAN COMMUNICATION SYSTEMClick here

3. Click here

   CHECK RELATED PART

   
   

   1. Confirm if the related part has the correct part number.

      Related Part	ECM
      	Main body ECU (Multiplex network body ECU)
      	Skid control ECU (Brake actuator assembly)

      Note:

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

      
      

      • ECM

        for 2AR-FE:Click here

        for A25A-FKS:Click here

        for 2GR-FKS:Click here

      • Main body ECU (Multiplex network body ECU)

        Click here

      • Skid control ECU (Brake actuator assembly)

        for LHD:Click here

        for RHD:Click here

      Result
      Result Proceed to The related part has the correct part number. A The related part has an incorrect part number. B

   
   
   • AClick here
   • BClick here
4. Click here

   CHECK FOR DTC

   
   

   1. Select Health Check on the GTS screen and check if system DTCs of the related part are output.

      Tip:

      If system DTCs of the related part are stored, assist map writing to the power steering ECU (rack and pinion power steering gear assembly) may not be performed properly.

      Result
      Result Proceed to System DTCs of the related part are output. A System DTCs of the related part are not output. B

   
   
   • A

     GO TO DIAGNOSTIC PROCEDURE INDICATED BY OUTPUT DTC

   • B

     REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLYClick here

5. Click here

   REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

   
   

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

      
      

      • ECM

        for 2AR-FE:Click here

        for A25A-FKS:Click here

        for 2GR-FKS:Click here

      • Main body ECU (Multiplex network body ECU)

        Click here

      • Skid control ECU (Brake actuator assembly)

        for LHD:Click here

        for RHD:Click here

      Result
      Proceed to NEXT

   
   
   • NEXTClick here
6. Click here

   CHECK FOR DTC

   
   

   1. Check for DTCs.

      
      
      1. Chassis > EMPS > Trouble Codes
      2. 
         
      3. 
         

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

   
   
   • A

     END

   • B

     REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLYClick here