DTC 2-3: Digital Signal Processor Communication Error; DTC 2-4: GPS Communication Error: Procedure

1. Exit diagnosis mode and wait for 10 seconds.
2. Disconnect the cable from the negative (-) battery terminal, and wait for 10 minutes.
   NOTE:

   • After the power switch is turned OFF, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
   • When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .
3. Reconnect the cable to the negative (-) battery terminal, and wait for 10 seconds.
   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .

4. Turn the power switch ON (IG), and then check for the current DTC and historic DTC again. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   Current DTC 2-3 or 2-4 exists	A
   Historic DTC 2-3 or 2-4 exists	B

B → See step   2 

A → REPLACE MAYDAY ECU TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION