Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJLM
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): Security Indicator Light Circuit; 2016 - 2020 MY Sienna [12/2015 -        ]

Security Indicator Light Circuit

DESCRIPTION

The security indicator light blinks continuously due to a continuous signal received from the certification ECU while the engine immobiliser is set.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the certification ECU is replaced, register the key and ECU communication ID (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION ).

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

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

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

Smart Key

Tester Display

Test Part

Control Range

Diagnostic Note

Security Indicator

Security indicator light

ON or OFF

-

OK:

The security indicator light turns on and off according to operation via the Techstream.

OK

REPLACE CERTIFICATION ECU

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL )
NG

2.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - COMBINATION METER ASSEMBLY)

(a) Disconnect the certification ECU connector.

(b) Disconnect the combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D88-2 (INDS) - D146-3 (LP)

Always

Below 1 Ω

D88-2 (INDS) - Body ground

Always

10 kΩ or higher

D146-3 (LP) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BODY GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D145-20 (ES) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Combination Meter Assembly)
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR