Toyota Venza: ECU Power Source Circuit

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

DESCRIPTION

This circuit provides power for main body ECU (driver side junction block assembly) operation.

WIRING DIAGRAM

PROCEDURE

1.	CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU (POWER SOURCE))

(a) Disconnect the 2C driver side junction block assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
2C-24 - Body ground	Always	11 to 14 V
2C-30 - Body ground	Always	11 to 14 V

Text in Illustration

*1	Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BODY GROUND)

(a) Disconnect the 2F main body ECU (driver side junction block assembly) connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
2F-16 - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly))

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Security Indicator Light Circuit

DESCRIPTION Even when the theft deterrent system is in the disarmed state, the security indicator blinks due to a signal output from the immobiliser system. The security indicator blinks continuo ...

Unlock Warning Switch Circuit

DESCRIPTION The key unlock warning switch assembly turns on when the ignition key is inserted into the ignition key cylinder and turns off when the ignition key is removed. The main body ECU (driv ...

Other materials about Toyota Venza:

Precaution
PRECAUTION NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following system after the cable is reconnected. System Name See Procedure Back Door Closer System ...

Headlight Relay Circuit
DESCRIPTION The main body ECU (driver side junction block assembly) controls the headlight relays. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection proc ...

Room Temperature Sensor Circuit (B1411/11)
DESCRIPTION The room temperature sensor is installed in the instrument panel. It detects the cabin temperature to control the air conditioning AUTO mode. The resistance of the room temperature sensor changes in accordance with the cabin temperature. As ...