Toyota Venza: Taillight Relay Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Taillight Relay Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) controls the operation of the TAIL relay.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Check that the relay operates.

Main Body

Tester Display	Test Part	Control Range	Diagnostic Note
Taillight Relay	Taillight relay	ON/OFF	-

OK:

Taillight relay operates. (Taillights illuminate.)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT TAILLIGHT RELAY (TAIL)

(a) Remove the taillight relay from the main body ECU (driver side junction block assembly).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 5	Voltage is not applied between terminals 1 and 2	10 kΩ or higher
3 - 5	Apply the battery voltage between terminals 1 and 2	Below 1 Ω
3 - 4	Voltage is not applied between terminals 1 and 2	Below 1 Ω
3 - 4	Apply the battery voltage between terminals 1 and 2	10 kΩ or higher

REPLACE TAILLIGHT RELAY

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

(a) Disconnect the 2A 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
2A-1 - 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))

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Parking Brake Switch Circuit

DESCRIPTION The main body ECU (driver side junction block assembly) detects the condition of the parking brake switch. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHS ...

Headlight Beam Level Control Actuator Circuit

DESCRIPTION The headlight leveling ECU assembly actuates the headlight leveling motor according to vehicle conditions. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHS ...

Other materials about Toyota Venza:

Installation
INSTALLATION PROCEDURE 1. INSTALL ROOF DRIP SIDE FINISH MOULDING CLIP (w/o Sliding Roof) NOTICE: If reusing the clips, do not remove the double-sided tape remaining on the clips and where the clips will be installed on the body. If installi ...

Engine
General Maintenance GENERAL MAINTENANCE CAUTION / NOTICE / HINT HINT: Perform these procedures after the engine has cooled down. PROCEDURE 1. INSPECT DRIVE BELT Engine Type See Procedure 2GR-FE See pag ...

Air Inlet Damper Control Servo Motor Circuit (B1442/42)
DESCRIPTION The air inlet control servo motor sends pulse signals to indicate the damper position to the A/C amplifier. The A/C amplifier activates the motor (normal or reverse) based on these signals to move the air inlet mode selection air inlet control ...