Last Modified: 4-30-2014 6.6 C Doc ID: RM000001EG6000X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: 5-1; LEXUS Link Communication Error; 2006 MY LX470 [05/2005 -        ]

DTC

5-1

LEXUS Link Communication Error

DESCRIPTION

This DTC is output when one of the following occurs: 1) the mayday ECU assembly is malfunctioning; 2) multiplex network body ECU (main) is malfunctioning; or 3) the BEAN line is open or short.

DTC No.

DTC Detection Condition

Trouble Area

5 - 1

Communication or communication line is abnormal between mayday ECU and other ECU
  • Mayday ECU assembly
  • Light control switch circuit
  • Multiplex network body ECU (main)
  • Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK FOR DTC (BLINKING PATTERN)

(a) Turn the ignition switch from ON to OFF.

(b) Turn the ignition switch ON and wait 10 seconds.

(c) Check for the DTC again and wait for 20 seconds.

OK:

DTC 5-1 is not output.

OK

CLEAR HISTORIC DTC

NG

2.

CHECK FOR DTC

(a) Check for DTC using the intelligent tester (with CAN VIM).

HINT:

The mayday ECU assembly is connected to the BEAN. Check that there are no multiplex communication system DTCs present.

Proceed to

Result

Proceed to

No DTC

A

Related to multiplex communication system

B
B

GO TO MULTIPLEX COMMUNICATION SYSTEM

A

3.

CHECK HEADLIGHT DIMMER SWITCH

(a) When the headlight dimmer switch is set to the low beam position, check that the combination meter indicator dims.

HINT:

The mayday ECU assembly uses the BEAN communication stop judgment to check for the dim signal from the multiplex network body ECU (main).

OK:

Combination meter indicator dims.

NG

GO TO LIGHTING SYSTEM

OK

REPLACE MAYDAY ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION