WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

Procedures necessary when battery terminal is disconnected/reconnected

BATTERY TERMINAL DISCONNECTED/RECONNECTED PROCEDURES REFERENCE

Necessary Procedures	Procedure Details	Effects/Inoperative Functions When Necessary Procedures are not Performed	Notes
Navigation system initialization	After turning the ignition switch on (IG), insert the map disc.	Navigation system	If the map disc is inside when disconnecting the cable from the battery terminal, this procedure is not necessary

NOTE: After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.

Procedures necessary when ECU or other parts are replaced

ECU OR OTHER PARTS REPLACEMENT DISCONNECTED/RECONNECTED PROCEDURES REFERENCE

Replacement Part	Necessary Procedures	Effects/Inoperative Functions When Necessary Procedures are not Performed	Notes
ECM	Register VIN	DTC P0630 is output	-
Automatic transmission assembly Engine assembly ECM	Reset memory	Large shift shock	-
Tire pressure warning ECU	Register transmitter IDs Initialize tire pressure warning system	When DTC detection conditions of "transmitter ID not received" DTC is met, tire pressure warning light blinks for 1 minute, and then illuminates Tire pressure monitoring function	-
Tire pressure warning valve and transmitter	Register transmitter IDs Initialize tire pressure warning system	When DTC detection conditions of "transmitter ID not received" DTC is met, tire pressure warning light blinks for 1 minute, and then illuminates Tire pressure monitoring function of replaced wheel	Even if only one wheel is replaced, IDs for all 4 wheels must be registered.
Skid control ECU	Deceleration sensor zero point calibration Master cylinder pressure sensor zero point calibration	ABS warning light illumination VSC OFF indicator light illumination	-
Yaw rate sensor	Zero point calibration data clearance Deceleration sensor zero point calibration	ABS warning light illumination VSC OFF indicator light illumination VSC control is prohibited or operation is incorrect	-
Front Wheel Alignment Adjustment	Zero point calibration data clearance Deceleration sensor zero point calibration Perform initialization of steering angle sensor	ABS warning light illumination VSC OFF indicator light illumination	Complete the adjustment of the steering wheel and wheel alignment, and then initialize the steering angle sensor. If the order is reversed, the steering wheel and wheel alignment will become misaligned.
Occupant classification ECU	Zero point calibration Sensitivity check	Occupant classification system Passenger airbag ON/OFF indicator Airbag system (Front passenger side) Seat belt warning system (Front passenger side)	-
Transponder key ECU ECM Key	Registration	Engine starting	-
Door control transmitter Door control receiver	Register recognition code	Wireless door lock operation	-
Inner rear view mirror	Compass zone setting Compass calibration Register transmitter code	Direction is not displayed correctly Garage door opener system	-
Sliding roof driver gear (Sliding roof ECU) Sliding roof housing Sliding roof glass	Initialize sliding roof system	Auto operation Jam protection function Sliding roof operation after ignition switch is turned OFF Key-linked operation function (Driver side door only)	-

DESCRIPTION
HINT:

This registration section consists of two parts: Read VIN and Write VIN.
1. Read VIN: Explains the VIN reading process in a flowchart. This process allows the VIN stored in the ECM to be read in order to confirm that the two VINs, provided with the vehicle and stored in the vehicle's ECM, are the same.
2. Write VIN: Explains the VIN writing process in a flowchart. This process allows the VIN to be input into the ECM. If the ECM is changed, or the ECM VIN and vehicle VIN do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.
READ VIN
1. Confirm the vehicle VIN.
2. Connect Techstream to the DLC3.
3. Turn the ignition switch ON.
4. Turn the tester ON.
5. Enter the following menus: Powertrain/Engine and ECT/Utility/VIN/VIN Read.
WRITE VIN
1. Confirm the vehicle VIN.
2. Connect Techstream to the DLC3.
3. Turn the ignition switch ON.
4. Turn the tester ON.
5. Enter the following menus: Powertrain/Engine and ECT/Utility/VIN/VIN Write.
RESET MEMORY
NOTE:
- Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM.
- The RESET MEMORY can be performed only with the Techstream.
HINT:

The ECM memorizes the control conditions of the automatic transmission assembly and engine assembly. Therefore, when the automatic transmission assembly, engine assembly, or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information. Reset procedure is as follows.
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON and push the tester switch ON.
3. Enter the following menus:
  1. Select: Powertrain/Engine and ECT/Utility/Reset Memory.
    NOTE: After performing the RESET MEMORY, be sure to perform the ROAD TEST described earlier.
    
    HINT:
    
    The ECM learns through the ROAD TEST.
DESCRIPTION OF CODE REGISTRATION
It is necessary to register the transmitter ID in the tire pressure warning ECU when replacing the tire pressure warning valve and transmitter and/or tire pressure warning ECU.

Prepare all transmitter ID data before starting registration.
1. Before registration
  1. In case of tire pressure warning ECU replacement:
    - Read the registered transmitter IDs that are stored in the old ECU using the Techstream and note them down.
    - If reading stored transmitter IDs is impossible due to malfunctions of components such as the tire pressure warning antenna and receiver, remove the tires from the wheels and check the IDs located on the tire pressure warning valves and transmitters.
  2. In case of tire pressure warning valve and transmitter replacement: Take a note of the 8 digit number (transmitter ID) written on the tire pressure warning valve and transmitter.
    
    Fig 1: Identifying 8 Digit Number (Transmitter ID)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Safety Warning

Repair Instruction: Initialization

Use the Manual With the Right Hardware

When to See a Mechanic