DESCRIPTION
WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT NOTICE: If the transponder key ECU assembly or key is replaced, refer to Registration. Click here PROCEDURE
(a) Clear the DTCs. Click here
(a) Check for DTCs. Click here HINT: Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
(a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Engine and ECT / Data List. (e) Read the Data List according to the display on the Techstream. Engine and ECT
OK: OFF is displayed after the engine is started.
(a) Check that the security indicator light turns off when a registered key is inserted into the ignition key cylinder. OK: Security indicator light turns off.
(a) Check that the security indicator light turns off when another registered key is inserted into the ignition key cylinder. OK: Security indicator light turns off.
(a) Using another registered key, turn the ignition switch to ON. (b) Check that the engine starts 5 seconds after the ignition switch was turned to ON. OK: Engine starts normally.
(a) Replace the transponder key coil. Click here
(a) Using a registered key, turn the ignition switch to ON. (b) Check that the engine starts 5 seconds after the ignition switch was turned to ON. OK: Engine starts normally.
(a) Replace the transponder key ECU assembly with a new one. Click here
(a) Register the key. Click here
(a) Register the ECU communication ID. Click here
(a) Using a registered key, turn the ignition switch to ON. (b) Check that the engine starts 5 seconds after the ignition switch was turned to ON. OK: Engine starts normally.
(a) Replace the key. NOTICE: Key ID code registration is necessary when replacing the key. Click here
(a) Using a registered key, turn the ignition switch to ON. (b) Check that the engine starts 5 seconds after the ignition switch was turned to ON. OK: Engine starts normally.
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Toyota Tundra Service Manual > Can Communication System: Check Bus 5 Lines for Short Circuit
DESCRIPTION There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is below 54 Ω. Symptom Trouble Area Resistance between terminals 15 (CA5H) and 16 (CA5L) of ...