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Last Modified: 11-27-2007 1.6 C
Service Category: Audio/Visual/Telematics Section: Cellular Communication
Model Year: 2008 Model: LX570 Doc ID: RM000001EFU00DX
Title: CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: DESCRIPTION (2008 LX570)

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.

DTC Code

DTC Detection Condition

Trouble Area

2-3

A DSP interface communication error in the telephone ECU assembly.

Telephone ECU assembly

2-4

A GPS interface communication error in the telephone ECU assembly.

Telephone ECU assembly

Current DTC

Historic DTC only

Disconnect and reconnect battery. Check for current DTCs. If DTC returns, replace telephone ECU assembly and mayday battery (backup battery).

If this is only a historic DTC, the system has already recovered normally and should be operating normally. Clear historic DTCs.

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:

(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 INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION (2008 LX570) .

(d) Turn the engine switch on (IG), and then check for the current DTC and historic DTC again CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

Current DTC 2-3 or 2-4 is output

A

Historic DTC 2-3 or 2-4 is output

B
A

3.

REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY
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