LIGHTING (INT): LIGHTING SYSTEM: Engine Switch Illumination Circuit; 2016 MY Sienna [12/2015 - 08/2016]

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VJNK
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 08/2016]
Title: LIGHTING (INT): LIGHTING SYSTEM: Engine Switch Illumination Circuit; 2016 MY Sienna [12/2015 - 08/2016]

Engine Switch Illumination Circuit

DESCRIPTION

The illuminated entry system controls the engine switch illumination.

WIRING DIAGRAM

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) According to the display on the Techstream, perform the Active Test.

Smart Key

Tester Display	Test Part	Control Range	Diagnostic Note
Power/Engine SW Light	Engine switch illumination	ON/OFF	-

OK:

Engine switch illumination comes on.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.	INSPECT ENGINE SWITCH

(a) Remove the engine switch (See page ).

(b) Apply battery voltage to the terminals and check that the engine switch comes on.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → Terminal 11 (SWIL)

Battery negative (-) → Terminal 5 (GND)

Engine switch illumination comes on

Text in Illustration

*a

Component without harness connected

(Engine Switch)

*b

Illumination

(c) Reinstall the engine switch.

NG

REPLACE ENGINE SWITCH

OK

3.	CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - CERTIFICATION ECU AND BODY GROUND)

(a) Disconnect the D33 engine switch connector.

(b) Disconnect the D88 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D33-11 (SWIL) - D88-11 (SWIL)	Always	Below 1 Ω
D33-5 (GND) - Body ground	Always	Below 1 Ω
D33-11 (SWIL) - Body ground	Always	10 kΩ or higher

(d) Reconnect the certification ECU (smart key ECU assembly) connector.

(e) Reconnect the engine switch connector.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR