Toyota Yaris: Theft Deterrent System / Engine Hood Courtesy Switch Circuit

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Theft Deterrent System / Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine hood courtesy switch is installed together with the hood lock. 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:

If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.

Click here

PROCEDURE

1.

READ VALUE USING GTS (HOOD COURTESY SWITCH STATUS)

(a) According to the display on the GTS, read the Data List.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Hood Courtesy Switch Status

Engine hood courtesy switch

Close or Open

Close: Engine hood closed

Open: Engine hood open

-

Body Electrical > Main Body > Data List

Tester Display

Hood Courtesy Switch Status

OK:

The indicator on the GTS switches between ON and OFF in accordance with the hood lock assembly (engine hood courtesy switch) status.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

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

(a) Disconnect the A58 hood lock assembly (engine hood courtesy switch) connector.

(b) Disconnect the H4 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A58-1 (+) - H4-27 (HCTY)

Always

Below 1 Ω

A58-2 (E) - Body ground

Always

Below 1 Ω

A58-1 (+) or H4-27 (HCTY) - Other terminals and body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)

Click here

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)

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