Toyota Tundra Service Manual: Key Cannot be Registered

DESCRIPTION

A maximum of 5 master key ID codes can be registered.

WIRING DIAGRAM

Refer to "System Diagram".

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CAUTION / NOTICE / HINT

NOTICE:

If the transponder key ECU assembly is replaced, refer to Registration.

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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 registration mode, insert the key into the ignition key cylinder and check the security indicator light.

HINT:

If the new key ID code registration fails, code 2-1 will be output through the security light. 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 ID codes exceeds the maximum limit, code 2-3 will be output through the security indicator light. The output details are shown in the following illustration.

Result

Proceed to

Code 2-1 or Code 2-3 is output

A

Code 2-2 is output

B

B

END (REGISTERED KEY WAS USED)

A

3.

READ VALUE USING TECHSTREAM (TRANSPONDER S-CODE, TRANSPONDER M-CODE)

(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) Read the Data List according to the display on the Techstream.

Immobiliser

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Transponder M-Code

Number of registered master key / Min. 0, Max. 3

Number of registered master key

-

Result

Proceed to

5 is displayed for "Transponder M-code"

A

Values are other than above

B

A

MAXIMUM NUMBER OF KEYS ALREADY REGISTERED

B

4.

KEY REGISTRATION

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

Number of Keys Registered

Proceed to

0

New key ID code registration

1 to 4

Additional key ID code registration

(b) Check if an additional key can be registered.

OK:

Additional key can be registered.

OK

END (KEY MALFUNCTION)

NG

REPLACE TRANSPONDER KEY ECU ASSEMBLY

5.

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

(a) Remove the unlock warning switch assembly.

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(b) Inspect the unlock warning switch assembly.

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NG

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

OK

6.

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

(a) Disconnect the J26 transponder key ECU assembly connector.

(b) Disconnect the J18 unlock warning switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J18-1 - J26-3 (KSW)

Always

Below 1 Ω

J18-2 - Body ground

Always

Below 1 Ω

J18-1 - Body ground

Always

10 kΩ or higher

J26-3 (KSW) - Body ground

Always

10 kΩ or higher

OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    How To Proceed With Troubleshooting

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