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:

Adjusting the position and opening and closing the air outlets
► Front center outlets Direct air flow to the left or right, up or down. ►Front side outlets 1. Direct air flow to the left or right, up or down. 2. Turn the knob to open or close the vent. ►Rear center outlets 1. Direct air flow ...

Internal Control Module Monitoring Processor Performance (P060A)
MONITOR DESCRIPTION The main CPU and sub CPU of the ECM perform data communication between each other. The main CPU monitors the communications and WDC pulses from the sub CPU. When the signal malfunctions below are detected, the DTC is output. ...

Disassembly
DISASSEMBLY PROCEDURE 1. INSPECT CONNECTING ROD THRUST CLEARANCE (a) Using a dial indicator, measure the thrust clearance while moving the connecting rod back and forth. Standard thrust clearance: 0.160 to 0.512 mm (0.00630 to 0.0202 i ...