Toyota Sienna Service Manual: Dtc clear
(A) when using the obd ii scan tool or intelligent tester: clearing the dtcs.
(1) Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
(2) Turn the ignition switch to the ON position and turn the OBD II scan tool or the intelligent tester main switch on.
(3) When you use intelligent tester: Select the item "DIAGNOSIS/ENHANCED OBD II/DTC INFO/ CLEAR CODES [YES] button".
HINT: When operating the OBD II scan tool (complying with SAE J1978) or intelligent tester to erase the codes, the DTCs and freeze frame data will be erased. (See the OBD II scan tool's instruction book for operating instructions.) (b) When not using the OBD II scan tool or intelligent tester: Clearing the DTCs.
(1) Disconnect the battery cable or remove the EFI and ETCS fuses from the engine room J/B for 60 seconds or more. However, if you disconnect the battery cable, perform do the "INITIALIZE" procedure.