Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine hood courtesy switch is built into the hood lock assembly. This switch turns on when the engine hood is closed and turns off when the engine hood is opened.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM (HOOD COURTESY SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Hood Courtesy SW

Engine hood courtesy switch

ON or OFF

ON: Engine hood open

OFF: Engine hood closed

-

Body Electrical > Main Body > Data List

Tester Display

Hood Courtesy SW

OK:

The Techstream display changes correctly in response to the engine hood courtesy switch (hood lock assembly) status.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

2.

INSPECT ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)

(a) Remove the hood lock assembly.

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(b) Inspect the engine hood courtesy switch (hood lock assembly).

Click here

NG

REPLACE ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - BODY GROUND)

(a) Disconnect the J8 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J8-11 (HCTY) - A11-1

Always

Below 1 Ω

J8-11 (HCTY) or A11-1 - Body ground

Always

10 kΩ or higher

A11-2 - Body ground

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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