Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001CHQ004X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: DOOR LOCK: KEY REMINDER WARNING SYSTEM: Unlock Warning Switch Circuit; 2007 MY LX470 [08/2006 -        ]

Unlock Warning Switch Circuit

SYSTEM DESCRIPTION

The key unlock warning switch goes on when the ignition key is inserted in the key cylinder and goes off when the ignition key is removed. The ECU operates the key confinement prevention function while the key unlock warning switch is ON.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

When using the intelligent tester, start from *1. When not using the intelligent tester, start from *2.

PROCEDURE

1.

READ VALUE USING INTELLIGENT TESTER (KEY UNLOCK WARNING SWITCH) *1

(a) Check the DATA LIST for proper functioning of the key unlock warning switch operation 2007 MY LX470 [08/2006 -        ]; DOOR LOCK: KEY REMINDER WARNING SYSTEM: DATA LIST / ACTIVE TEST .

OK

GO TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

NG

2.

CHECK UNLOCK WARNING SWITCH ASSEMBLY *2

(a) Check the unlock warning switch 2007 MY LX470 [08/2006 -        ]; ENGINE IMMOBILISER: UNLOCK WARNING SWITCH: INSPECTION+ .

NG

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

OK

3.

CHECK WIRE HARNESS (WARNING SWITCH - BODY ECU (MAIN))
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

GO TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE