Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000018GY003X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: THEFT DETERRENT: THEFT DETERRENT SYSTEM: Engine Hood Courtesy Switch Circuit; 2007 MY LX470 [08/2006 -        ]

Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine hood courtesy switch is built into the engine hood lock assembly and turns ON when the engine hood is opened and turns OFF when the engine hood is closed.

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 (ENGINE HOOD COURTESY SWITCH) *1

(a) Check the DATA LIST for proper functioning of the engine hood courtesy switch.

Theft warning ECU assembly

Item

Measurement Item / Display (Range)

Normal Condition

Diagnostic Note

HOOD COURTESY SW

Engine hood courtesy switch signal / ON or OFF

ON: Engine hood is open

OFF: Engine hood is closed

-

OK:

On tester screen, item changes between ON and OFF according to above chart.

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH) *2

(a) Measure the resistance of the switch.

Standard resistance:

Tester Connection

Condition

Specified Condition

1 - 2

LOCK

10 kΩ or higher

UNLOCK

Below 1 Ω
NG

REPLACE HOOD LOCK ASSEMBLY

OK

3.

CHECK WIRE HARNESS (SWITCH - ECU AND BODY GROUND)

(a) Disconnect the E3 switch connector.

(b) Disconnect the T6 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection

Specified Condition

E3-1 - T6-34 (DSWH)

Below 1 Ω

E3-2 - Body ground
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE