The following items must be initialized for normal system operation in cases such as after the battery is reconnected, or maintenance is performed on the vehicle.

Initialization
For ownersRemoval
REMOVAL
PROCEDURE
1. REMOVE AUTOMATIC TRANSAXLE ASSEMBLY (for 2GR-FE)
See page
2. REMOVE AUTOMATIC TRANSAXLE ASSEMBLY (for 1AR-FE)
See page
3. REMOVE TRANSFER ASSEMBLY
(a) Remove the 2 bolts and 6 nuts.
...
Light Control Switch Circuit
DESCRIPTION
The main body ECU (driver side junction block assembly) receives the following
switch information:
Light control switch position off, tail, head or AUTO
Dimmer switch position high, low or high flash (pass)
Fog light switch posit ...
Cooling Fan Circuit
DESCRIPTION
The ECM turns on or off the fan relays using signals calculated from the engine
coolant temperature, air conditioning (ON/OFF), air conditioner refrigerant pressure,
engine speed, and vehicle speed signals.
The ECM switches the circuit of the ...