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:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Lighting system data can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs. 2. CHECK DLC3 (a) C ...

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL FRONT SIDE MARKER LIGHT BULB (a) Install the front side marker light bulb to the front side marker light socket. (b) Turn the front side marker light socket with the front side marker light bulb in the directi ...

Rear Occupant Classification Sensor RH Circuit Malfunction (B1783)
DESCRIPTION The rear occupant classification sensor RH circuit consists of the occupant classification ECU and rear occupant classification sensor RH. DTC B1783 is recorded when a malfunction is detected in the rear occupant classification sensor RH circ ...