Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJLE
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): Key Cannot be Registered; 2016 - 2020 MY Sienna [12/2015 -        ]

Key Cannot be Registered

DESCRIPTION

A maximum of 5 master key codes and 3 sub key codes can be registered.

WIRING DIAGRAM

Refer to "System Diagram" (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): SYSTEM DIAGRAM 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): SYSTEM DIAGRAM ).

CAUTION / NOTICE / HINT

NOTICE:

When replacing the key and transponder key ECU assembly, refer to the 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 REGISTRATION MODE

(a) Check that the system enters registration mode.

OK:

System enters registration mode

NG

GO TO STEP 5

OK

2.

CHECK SECURITY INDICATOR LIGHT OPERATION

(a) In the registration mode, when the key inserted in ignition key cylinder, check that the security indicator light.

HINT:

If the new key code registration fails, code 2-1 will be output through the theft warning indicator light assembly. Trying to re-register an already registered key will cause code 2-2 to be output when the key is inserted. If the number of registered key codes exceeds the maximum limit, code 2-3 will be output through the theft warning indicator light assembly. The output details are shown below.

Result

Result

Proceed to

Code 2-1

A

Code 2-2

B

Code 2-3

C

B

REGISTRATION AS ANOTHER KEY

C
A

3.

READ VALUE 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 / Immobiliser / Data List.

(e) According to the display on the Techstream, read the Data List.

Immobiliser

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Transponder S-code

Number of registered sub-keys / min.: 0, max.: 15

Number of registered sub-keys

-

Transponder M-code

Number of registered master keys / min.: 0, max.: 15

Number of registered master keys

-

Result

Result

Proceed to

None of the below

A

Registered master keys: 5, registered sub-keys: 0

B

Registered master keys: 0, registered sub-keys: 3

C

Registered master keys: 5, registered sub-keys: 3

D

B

KEY REGISTRATION (SUB-KEY)

C

KEY REGISTRATION (MASTER KEY)

D

NOT KEY REGISTRATION

A

4.

KEY REGISTRATION

(a) Refer to the table below to determine if additional keys can be registered.

Number of Keys Registered (Master and Sub)

Proceed to

0

New key ID registration

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

1 to 7

Additional key ID registration

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

(b) Check whether key registration.

OK

END (KEY MALFUNCTION)

NG

REPLACE TRANSPONDER KEY ECU ASSEMBLY

5.

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

(a) Inspect the unlock warning switch assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; DOOR LOCK: UNLOCK WARNING SWITCH: INSPECTION ).

NG

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

OK

6.

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - UNLOCK WARNING SWITCH ASSEMBLY)

(a) Disconnect the D26 unlock warning switch assembly connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D26-1 - D151-3 (KSW)

Always

Below 1 Ω

D26-2 - Body ground

Always

Below 1 Ω

D26-1 or D151-3 (KSW) - Body ground

Always

10 kΩ or higher

OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR