Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001BCB001X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: SLIDING ROOF: SLIDING ROOF SYSTEM: Ignition Switch Circuit; 2007 MY LX470 [08/2006 -        ]

Ignition Switch Circuit

DESCRIPTION

This circuit sends an ignition switch ON or OFF signal to the ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT FUSE (ECU-IG1, AM1)

(a) Measure the resistance of the ECU-IG1 and AM1 fuses.

Standard resistance:

Below 1 Ω

NG

REPLACE FUSE

OK

2.

CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (IG VOLTAGE)

(a) Remove the ECU with the connectors connected.

(b) Measure the voltage between terminal IG of the ECU connector and body ground when the ignition switch is ON and OFF.

Standard voltage:

Tester Connection

Ignition Switch Condition

Specified Condition

M2-8 (IG) - Body ground

ON

10 to 14 V

M2-8 (IG) - Body ground

OFF

Below 1 V
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE