Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJL8
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): Security Indicator Light Does not Blink; 2016 - 2020 MY Sienna [12/2015 -        ]

Security Indicator Light Does not Blink

DESCRIPTION

  • When the engine immobiliser system is set, the security indicator light blinks continuously, but does not illuminate if the engine immobiliser system is not set.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • When replacing the transponder key ECU assembly, refer to Registration (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION ).

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DTC CHECK / CLEAR 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DTC CHECK / CLEAR ).

OK:

DTC is not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

(See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DIAGNOSTIC TROUBLE CODE CHART 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DIAGNOSTIC TROUBLE CODE CHART )

OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR)

(a) Check that the security indicator light illuminates when operating it with the Active Test (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DATA LIST / ACTIVE TEST ).

Immobiliser

Tester Display

Test Part

Control Range

Diagnostic Note

Security Indicator

Security indicator light

ON/OFF

-

OK:

Security indicator light can be turned on and off using the Techstream.

NG

GO TO STEP 4

OK

3.

READ VALUE USING TECHSTREAM (IMMOBILISER)

(a) Turn the ignition switch off.

HINT:

When using the Techstream with the ignition switch off to troubleshoot: Connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds until communication between the Techstream and vehicle begins.

(b) Using the Techstream, read the Data List (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DATA LIST / ACTIVE TEST ).

Immobiliser

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Immobiliser

Engine immobiliser system status/SET or UNSET

UNSET: Ignition switch ON

SET: Without key

-

OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

GO TO STEP 6

4.

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

(a) Disconnect the D151 transponder key ECU assembly connector.

(b) Disconnect the D145 or D146 combination meter assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D151-8 (IND) - D146-3 (LP)

Always

Below 1 Ω

D145-20 (ES) - Body ground

Always

Below 1 Ω

D151-8 (IND) or D146-3 (LP) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

REPLACE COMBINATION METER ASSEMBLY

(a) Temporarily replace the combination meter assembly with a new one or known good one (See page 2016 - 2020 MY Sienna [12/2015 -        ]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL ).

(b) When the immobiliser is set, check that the security indicator light blinks.

OK:

Security indicator light blinks.

OK

END (COMBINATION METER ASSEMBLY WAS DEFECTIVE)

NG

REPLACE TRANSPONDER KEY ECU ASSEMBLY

6.

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the transponder key ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D151-5 (GND) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D151-1 (+B) - Body ground

Always

11 to 14 V

D151-2 (IG) - Body ground

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Transponder Key ECU Assembly)

OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR