Toyota Venza manuals

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)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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)



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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