Toyota Venza manuals

Toyota Venza: IG Power Source Circuit

DESCRIPTION

The main power source is supplied to the A/C amplifier when the ignition switch is ON.

The power source is used for operating the A/C amplifier and servo motor, etc.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

Start the engine before inspection. Check the IG1 relay or battery if the engine does not start.

PROCEDURE

1.

INSPECT A/C AMPLIFIER

(a) Remove the A/C amplifier with its connectors still connected.


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

D47-1 (IG+) - D47-14 (GND)

Ignition switch off

Below 1 V

D47-1 (IG+) - D47-14 (GND)

Ignition switch ON

11 to 14 V

Text in Illustration

*1

Component with harness connected

(A/C Amplifier)


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

2.

CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)

(a) Disconnect the A/C amplifier connector.


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

D47-1 (IG+) - Body ground

Ignition switch off

Below 1 V

D47-1 (IG+) - Body ground

Ignition switch ON

11 to 14 V

Text in Illustration

*1

Front view of wire harness connector

(to A/C Amplifier)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D47-14 (GND) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to A/C Amplifier)



OK

REPLACE A/C AMPLIFIER


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Blower Motor Circuit
DESCRIPTION The blower motor is operated by signals from the A/C amplifier. Blower motor speed signals are transmitted in accordance with changes in the duty ratio. WIRING DIAGRAM CAUTION / NOT ...

Back-up Power Source Circuit
DESCRIPTION The back-up power source circuit for the A/C amplifier is shown below. Power is supplied even when the ignition switch is turned off. The power is used for diagnostic trouble code mem ...

Other materials about Toyota Venza:

Transponder Key Ecu
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE AIR CONDITIONING UNIT ASSEMBLY HINT: Refer to the procedure up to Remove Air Conditioning Unit Assembly (See page ). 2. REMOVE TRANSPONDER KEY ECU ASSEMBLY (a) ...

Speed Sensor(when Using The Engine Support Bridge)
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE TRANSMISSION VALVE BODY ASSEMBLY See page 2. REMOVE SPEED SENSOR (a) Disconnect the speed sensor connector. (b) Remove the 2 bolts and speed sensor from the tra ...

Afs Ecu
Components COMPONENTS ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL AFS ECU (a) Engage the guide. (b) Install the AFS ECU with the bolt. (c) Connect the connector. 2. INSTA ...

© 2016-2025 Copyright www.tovenza.com

0.1179