Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000017X4005X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1218; Body No. 2 ECU Communication Stop; 2007 MY LX470 [08/2006 -        ]

DTC

B1218

Body No. 2 ECU Communication Stop

DESCRIPTION

HINT:

"Body No. 2 ECU" refer to the multiplex network body ECU No. 2 (sub).

  • This DTC is output when communication stops between the multiplex network body ECU No. 2 (sub) and multiplex network body ECU (main).

    DTC No.

    DTC Detection Condition

    Trouble Area

    B1218

    No signal from multiplex network body ECU No. 2 (sub) for more than 10 seconds.
    • Multiplex network body ECU No. 2 (sub)
    • Wire harness

WIRING DIAGRAM

  • Refer to DTC B1214, and 1215 2007 MY LX470 [08/2006 -        ]; MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1214,B1215; Short to B+ in Door System Communication Bus Malfunction+ .

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK MULTIPLEX NETWORK BODY ECU NO. 2 (SUB)

(a) Check that the rear wiper system operates normally.

HINT:

In this inspection, whether or not the multiplex network body ECU No. 2 (sub) CPU functions normally can be diagnosed.

NG

REPLACE MULTIPLEX NETWORK BODY ECU NO. 2 (SUB)

OK

2.

CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU NO. 2 (SUB) - 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

Multiplex network body ECU No. 2 (Sub) - Multiplex network body ECU (Main)

S27-2 (MPX+) - B7-23 (MPX2)

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 MULTIPLEX NETWORK BODY ECU NO. 2 (SUB)