DTC C1789: Vehicle Identification Malfunction (TO 08/2009): Procedure

1. Check for DTC C1781. Refer to DTC CHECK / CLEAR

   Result

   Condition	Proceed to
   DTC C1781 is not output	A
   DTC C1781 is output	B

B → See step   7 

A: Go to next step 

1. Perform registration of vehicle identification information. Refer to REGISTRATION

NEXT: Go to next step 

1. Check for DTC C1789. Refer to DTC CHECK / CLEAR

   Result

   Condition	Proceed to
   DTC C1789 is not output	A
   DTC C1789 is output	B

B → See step   4 

A → END 

1. Check the CAN communication system for any malfunctions. Refer to DIAGNOSIS SYSTEM .

   Result

   Condition	Proceed to
   CAN communication system is normal	A
   CAN communication system is malfunctioning	B

B → See step   8 

A: Go to next step 

1. Check if the part number of the installed ECM is correct.

   OK

   An ECM with the correct part number is installed.

NG → See step   9 

OK → See step   6