Toyota Venza: Headlight Leveling ECU Power Source Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Headlight Leveling ECU Power Source Circuit

DESCRIPTION

This circuit detects the state of the ignition switch, and sends it to the headlight leveling ECU assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT LEVELING ECU ASSEMBLY)

(a) Disconnect the A40 headlight leveling ECU assembly connector.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A40-1 (IG) - Body ground	Ignition switch ON	11 to 14 V
A40-1 (IG) - Body ground	Ignition switch off	Below 1 V

Text in Illustration

*1	Front view of wire harness connector (to Headlight Leveling ECU assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A40-9 (E1) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Headlight Leveling ECU assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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 ...

Indicator Circuit

DESCRIPTION The headlight beam level control system indicator light in the combination meter assembly comes on for approximately 3 seconds when the ignition switch is turned to ON. The indicator ...

Other materials about Toyota Venza:

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the cruise control system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

How To Proceed With Troubleshooting
PROCEDURE 1. CHECK TIRE AND WHEEL SYSTEM DIAGNOSIS OF IRREGULAR TIRE WEAR GO TO STEP 11 DIAGNOSIS OF TIRE VIBRATION 2. ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART CAN Communication System DTC Code Detection Item Output ECU/Techstream Display See page U0100 Lost Communication with ECM / PCM Power management ...