Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Engine Switch Illumination Circuit

DESCRIPTION

The illuminated entry system controls the engine switch illumination.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

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PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

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

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Smart Key > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Power/Engine SW Light	Engine switch illumination	OFF or ON	-

Body Electrical > Smart Key > Active Test

Tester Display
Power/Engine SW Light

OK:

Engine switch illumination comes on.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT ENGINE SWITCH

(a) Remove the engine switch.

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(b) Inspect the engine switch.

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REPLACE ENGINE SWITCH

3.	CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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Toyota Avalon (XX50) 2019-2022 Owners Manual