DESCRIPTION A maximum of 5 master key ID codes can be registered. WIRING DIAGRAM Refer to "System Diagram". Click here CAUTION / NOTICE / HINT NOTICE: If the transponder key ECU assembly is replaced, refer to Registration. Click here PROCEDURE
(a) Check that the system enters registration mode. OK: System enters registration mode.
(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. 
(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
(a) Refer to the table below to determine if additional keys can be registered.
(b) Check if an additional key can be registered. OK: Additional key can be registered.
(a) Remove the unlock warning switch assembly. Click here (b) Inspect the unlock warning switch assembly. Click here
(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:
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Toyota Tundra Service Manual > Sfi System: Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION When troubleshooting OBD II (On-Board Diagnostics) vehicles, the Techstream (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle's ECM (Engine Control Module) can then be read. OBD II regulations ...
