Toyota Tundra Service Manual: 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

PROCEDURE

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) According to the display on the Techstream, read the Data List.

OK:

The indicator on the Techstream 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

(a) Disconnect the A29 hood lock assembly (engine hood courtesy switch) connector.

(b) Disconnect the J165 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Remove the hood lock assembly (engine hood courtesy switch).

Click here

(b) Inspect the 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)