DTC C1789: Vehicle Identification Malfunction [09/2014 - ]: Procedure

1. Check for DTCs (See page. Refer to DTC CHECK / CLEAR [09/2014 - ] ).
   RESULT
   
   

   Result	Proceed to
   CAN DTC is not output	A
   CAN DTC is output	B

Result:  B

B 

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) 

(See page. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 10/2015] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result:  A

A 

See step  2

1. Check that vehicle identification information has been stored (See page. Refer to TEST MODE PROCEDURE [09/2014 - ] ).
   RESULT
   
   

   Result	Proceed to
   Information stored	A
   Information not stored	B

Result:  B

B 

PERFORM VEHICLE IDENTIFICATIONINFORMATION REGISTRATION 

(See page. Refer to TEST MODE PROCEDURE [09/2014 - ] )

Result:  A

A 

See step  3

1. If the DTC was output as a result of the replacement of a related part, replace the part with one that has a correct part number.

   Related Part

   Power management control ECU

   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 power management control ECU (See page. Refer to REMOVAL [09/2014 - ] ).

   HINT: 

   If parts have not been replaced and DTC C1789 is output, there may be an internal malfunction in the absorber control ECU. Therefore, replace the absorber control ECU (See page. Refer to REMOVAL [09/2014 - ] ).

Result:  NEXT

NEXT 

See step  4

1. Clear the DTCs (See page. Refer to DTC CHECK / CLEAR [09/2014 - ] ).
2. Turn the power switch off.
3. Check if DTC C1789 is output (See page. Refer to DTC CHECK / CLEAR [09/2014 - ] ).

   OK

   DTC C1789 is not output.

Result:  OK

OK 

USE SIMULATION METHOD TO CHECK 

(See page. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 10/2015] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result:  NG

NG 

REPLACE ABSORBER CONTROL ECU 

(See page. Refer to REMOVAL [09/2014 - ] )