Last Modified: 4-30-2014 6.6 C Doc ID: RM0000017X1001X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1269; Theft Deterrent ECU Communication Stop; 2006 MY LX470 [05/2005 -        ]

DTC

B1269

Theft Deterrent ECU Communication Stop

DESCRIPTION

HINT:

"Theft deterrent ECU" refer to the theft warning ECU.

  • This DTC is output when communication stops between the theft warning ECU and multiplex network body ECU (main).

DTC No.

DTC Detection Condition

Trouble Area

B1269

No signal from theft warning ECU assembly for more than 10 seconds.
  • Theft warning ECU assembly
  • Wire harness

WIRING DIAGRAM

  • Refer to DTC B1214 and 1215 2006 MY LX470 [05/2005 -        ]; MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1214,B1215; Short to B+ in Door System Communication Bus Malfunction+ .

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK WIRE HARNESS (THEFT WARNING ECU ASSEMBLY - MULTIPLEX NETWORK BODY ECU (MAIN))

(a) Disconnect the ECU connectors mentioned in the table below.

(b) Check the continuity of the wire harness between the connectors.

Wire harness side connector of ECU

Terminal

Theft warning ECU assembly - Multiplex network Body ECU (Main)

T6-31 (MPX1) - B9-26 (MPX3)

OK:

There is continuity between the connectors.

HINT:

If there is an open in any wire harness, repair it.

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE THEFT WARNING ECU ASSEMBLY