Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000017X3005X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1245; Wiper ECU Communication Stop; 2007 MY LX470 [08/2006 -        ]

DTC

B1245

Wiper ECU Communication Stop

DESCRIPTION

HINT:

"Wiper ECU" refer to the windshield wiper ECU.

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

DTC No.

DTC Detection Condition

Trouble Area

B1245

No signal from windshield wiper ECU for more than 10 seconds.
  • Windshield wiper ECU
  • 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 WINDSHIELD WIPER ECU

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

HINT:

In this inspection, whether or not the windshield wiper ECU CPU functions normally can be diagnosed.

NG

REPLACE WINDSHIELD WIPER ECU

OK

2.

CHECK WIRE HARNESS (WINDSHIELD WIPER ECU - 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

Windshield wiper control ECU - Multiplex network body ECU (Main)

A51-2 (MPX2) - 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 WINDSHIELD WIPER ECU