DTC 2-3

CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: 2-3: Digital Signal Processor Communication Error

DTC 2-3 - Digital Signal Processor Communication Error

DTC 2-4 - GPS Communication Error

DESCRIPTION

These DTCs are stored when a communication error occurs between the CPU and each interface in the telephone ECU assembly.










INSPECTION PROCEDURE

PROCEDURE

1. RESET TELEPHONE ECU ASSEMBLY
(a) Exit diagnosis mode and wait for 10 seconds.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for 10 minutes.
NOTICE:
- After the engine 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 engine 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 Repair Instruction - Initialization.
(c) Reconnect the cable to the negative (-) battery terminal, and wait for 10 seconds.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(d) Turn the engine switch on (IG), and then check for the current DTC and historic DTC again Reading and Clearing Diagnostic Trouble Codes.

Result





B -- CLEAR HISTORIC DTC
A -- Continue to next step.
2. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY
NEXT -- PERFORM REGISTRATION