DTC B2602: Key Unlock Warning Switch Circuit Malfunction; DTC B2606: Key Code Confirm Signal Malfunction: Procedure

HINT: 

The power tilt and power telescopic steering column system uses the CAN communication system, so check its diagnostic system before proceeding to troubleshooting.

1. Check if DTC B2621 is output.
   RESULT
   
   

   Result	Proceed to
   B2621 is not output	A
   B2621 is output	B

   HINT: 

   • If DTC B2621 is output, perform troubleshooting for B2621 first.
   • DTC B2621 indicates a communication interruption for the power tilt and power telescopic steering column system.

B → See step   5 

A: Go to next step 

1. Use the Data List to check if the communication of the key code and the engine switch are functioning properly.
   TILT & TELESCOPIC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   IG Switch (CAN)	Communication state of engine switch/ON or OFF	ON: Communication normal OFF: Communication interrupted	-
   Key Code Confirm (CAN)	Communication state of key code confirmation signal/ON or OFF	ON: Communication normal OFF: Communication interrupted	-

   OK

   "ON" is displayed.

NG → See step   6 

OK: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Check for DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC B2602 and/or B2606 is not output.

NG → See step   7 

OK → See step   4