Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000018CF001X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): Ignition Switch Circuit; 2007 MY LX470 [08/2006 -        ]

Ignition Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT FUSE (ECU-IG1)
NG

CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED TO FUSE, AND REPAIR THEM

OK

2.

CHECK POWER SEAT CONTROL ECU (IG VOLTAGE)

(a) Remove the power seat control ECU without disconnecting its connectors.

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

OK:

Ignition Switch

Specified Condition

ON

10 to 14 V

OFF

Below 1 V
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE