Toyota Venza: Horn Circuit

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Theft Deterrent System(w/o Smart Key System) / Horn Circuit

DESCRIPTION

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (driver side junction block assembly) transmits a signal to cause the horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM

PROCEDURE

1.	INSPECT HORNS

(a) Press the horn switch and check if the horns sound.

Result	Proceed to
Horns sound	A
Horns do not sound	B

GO TO HORN SYSTEM

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Select the item below in the Active Test and then check that the horns operate.

Main Body

Tester Display	Test Part	Control Range	Diagnostic Note
Vehicle Horn	Vehicle horns	ON / OFF	-

OK:

The vehicle horns sound and stop correctly when operated through the Techstream.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

Engine Hood Courtesy Switch Circuit

DESCRIPTION The security courtesy switch is installed together with the hood lock. This switch turns off when the engine hood is opened and turns on when the engine hood is closed. WIRING DIAGRAM ...

Security Horn Circuit

DESCRIPTION When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (driver side junction block assembly) controls the security horn. WIRI ...

Other materials about Toyota Venza:

Dtc Check / Clear
DTC CHECK / CLEAR 1. DTC CHECK (USING SST CHECK WIRE) (a) Turn the ignition switch off. (b) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3. SST: 09843-18040 (c) Turn the ignition switch to ON. (d) Read and record any DTCs from the tire pre ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART If a trouble code is displayed during the DTC check, check the circuit listed for the code in the table below (refer to the appropriate page). HINT: When the SRS warning light remains on and the DTC output is the norm ...

Disposal
DISPOSAL PROCEDURE 1. DISPOSE OF REAR SHOCK ABSORBER (a) Fully extend the shock absorber piston rod. (b) Using a drill, make a hole in area B shown in the illustration to discharge the gas inside. ...