Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MANUAL UP / DOWN FUNCTION
1. Check that the manual UP / DOWN function using the master switch and regulator switch can operate all the power windows.
  OK: Manual UP / DOWN function operates normally.
NG: OTHER PROBLEM

OK: Go to Next Step

CHECK FOR DTC

Operate the ignition switch. Check if DTC B2780 is output.

Result

RESULT REFERENCE CHART

Result	Proceed to
DTC B2780 is not output	A
DTC B2780 is output	B

B: GO TO ENGINE IMMOBILISER SYSTEM

A: Go to Next Step

CHECK OPERATION OF FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY
1. Check that the map light illuminates when the driver side door is opened.
  OK: Map light illuminates normally.
NG: GO TO LIGHTING SYSTEM

OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH