Toyota Venza: Interior Light Power Source Circuit

Toyota Venza Service Manual / Lighting (int) / Lighting System / Interior Light Power Source Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) controls operation of the DOME CUT relay in order to supply power to the interior lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	INSPECT DOME CUT RELAY

(a) Remove the DOME CUT relay.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage applied to terminals 1 and 2	Below 1 Ω
3 - 5	Battery voltage not applied between terminals	10 kΩ or higher

Text in Illustration

*1	Component without harness connected (DOME CUT Relay)

REPLACE DOME CUT RELAY

2.	CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY))

(a) Disconnect the 2C main body ECU (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-27 - Body ground	Ignition switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (DOME CUT RELAY - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) AND BODY GROUND)

(a) Disconnect the 2R main body ECU (driver side junction block assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Relay Terminal 5 - 2R-6	Always	Below 1 Ω
Relay Terminal 2 - 2R-7	Always	Below 1 Ω
Relay Terminal 5 - Body ground	Always	10 kΩ or higher
Relay Terminal 2 - Body ground	Always	10 kΩ or higher
Relay Terminal 1 - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Install the DOME CUT relay.

(b) Reconnect the 2C main body ECU (driver side junction block assembly) connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
2R-6 - Body ground	Ignition switch off	11 to 14 V
2R-7 - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*1	Component with harness connected (Main Body ECU (Driver Side Junction Block Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR (DOME CUT RELAY - EACH LIGHT)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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