Toyota Venza manuals

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)



NG

REPLACE DOME CUT RELAY


OK

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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.

(c) Reconnect the 2R 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))


OK

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


NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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