Today's study is a focus on two Toyota gasoline cars and the new generation drivers that our driver development department has conceived for them.
In particular, we will concentrate on these two vehicles:

- 2013 TOYOTA TUNDRA 5700 V8 VVT-i 381 PS

- TOYOTA CAMRY 2400 V6 VVT-i 145 PS

 

2013 TOYOTA TUNDRA 5700 V8 VVT-i 381 PS

Its 5.7L V8 (3UR-FE) engine produces 381 HP at 5,600rpm and 544 Nm of torque at 3,600rpm. This engine is also mounted on Toyota Sequoia and Toyota Land Cruiser; you can find it also on Lexus LX 570.

It doesn't feature the D-4S gasoline direct injection but has the Dual VVT-i that will be better described later. A stainless steel exhaust manifold incorporating a 3-way catalytic converter is used. The engine is currently assembled at Toyota Motor Manufacturing in Alabama. The engine has been tested for over 1.3 million kilometers. The engine's weight is just 222 kg.

It is also available with Toyota Racing Development Eaton's supercharger kit (TRD) that bumps power up to 504 hp and 750 Nm of torque. Being manufactured and developed by TRD, the supercharger kit can be installed by Toyota dealers.

There is also the ethanol version of this engine, which is identified by engine code 3UR-FBE. The VVT-i (Variable Valve Timing intelligent) is a variable intake valve timing system. The VVT-i system consists of a variator that hydraulically controls the camshaft that apply the intake valves, modifying its pitch (up to a maximum of 60°) with respect to the drive shaft. This phasing action is allowed by a central unit (ECU), that takes into account the engine charge and running conditions, making the oil pressure vary within the VVT-i drive unit placed at the end of the camshaft; such pressure acts on a screw that modifies the shaft pitch with respect to the distribution chain, thus changing its phasing.

This system changes the timing of valves and of their crossing with the exhaust valves, according to the running conditions adapting to the engine needs so as to enhance its performance and grant optimum combustion, thus allowing torque enhancement and better consumption and emission values. As a result, combustion is optimal with high gas temperatures and the quantity of nitrogen oxides in the exhaust gas decreases.

The Dual VVT-i system adjusts both intake and exhaust timing.

 

From 2006 to 2011 TOYOTA CAMRY 2400 V6 VVT-i 145 PS

Its 2.4L (2AZ-FE) engine produces 145 HP at 6,000rpm and 200 Nm of torque at 6,000rpm. This engine is also mounted on Toyota Alphard, Toyota Estima and Toyota Harrier.

The following versions of this engine have a power of 161 HP (120 kW) for Scion TC, 177 HP (132 kW) for Rav4, and 158 HP (118 kW) for Camry, Corolla XRS, and Scion xB.  A TRD kit with supercharger is available for Scion TC.

 

How to find and read the control unit (ECU)?

 

TOYOTA TUNDRA 5700 V8 VVT-i 381PS

 

 

Control Unit details

Manufacturer: Denso
Model: 275036-3560
Micro controller: 76F0070
EEPROM: 93C86

 

It is possible to read it in three different ways:

- with positioning frame;
- direct with welding adapter;
- with free wires.

As for the connection with positioning frame, you will need:

- 14P600KT02 cable;
- 14P800ADBO positioning frame;
- 14AM00T16M adapter;
- flat cable 144300T102;
- welding wire

 

As for the direct connection with welding adapter, you will need:

- 14P600KT02 cable;
- 14AS00T09S adapter;
- welding pin strip;
- flat cable 144300T102;

As for the connection with free wires, you will need:

- 14P600KT02 cable;
- 16-pole rainbow flat cable 144300T105;
- welding wire

It is also possible to perform ID (identification) and writing through OBD by using protocol 517, the original file will be automatically downloaded from ksuite after saving the ID on your computer.

 

 

TOYOTA CAMRY 2400 V6 VVT-i 145PS

 

 

Control Unit details

Manufacturer: Denso
Model: 275036-9160
Micro controller: 76F0038AGD
EEPROM: 93C56

 

 

 

You can read it by using the free wire connection mode and you will need:

- 14P600KT02 cable
- 16-pole rainbow flat cable 144300T105
- welding wire

It is also possible to perform ID (identification) and writing through OBD by using protocol 517, the original file will be automatically downloaded from ksuite after saving the ID on your computer.

 

Let's see now the maps found on the ECM driver

 

 

Desired engine charge

This map represents the ideal rate of air entering the engine according to the number of engine RPM and the torque requested by the driver through the accelerator pedal.

 

 

Optimal engine torque

This map represents the optimal torque of a vehicle, according to the number of engine RPM and the filling percentage.

 

 

Base map timing

This map represents the engine timing used in a vehicle's standard running condition, according to the number of engine RPM and the engine charge expressed in %Air. It supplies the correct deg BTDC value.  It can also control the timing according to the specifications of the fuel found in the tank.

 

 

RPM limiters

 

Base map injection

It allows the engine to stop the closed loop function (when the injection is regulated to keep lambda =1), thus injecting more gasoline by high engine revolutions and load. This map depends on the engine revolutions and TPS revolutions.

 

 

TOYOTA CAMRY 2400 V6 VVT-i 145PS/6000rpm, 200Nm/6000rpm

 

Exhaust gas temperature

It represents the temperature (°C) of exhaust gases depending on the engine RPM and the air rate.

 

 

Enrichment injection

It is expressed as "factor" and represents the enrichment on the injection depending on the engine RPM and the air rate.

 

 

Full load injection

It represents the LAMBDA according to the motor revolutions and TPS degrees.

 

 

Correction injection f(ECT)

It is expressed as "factor" and represents the correction on the injection depending on the engine RPM and the cooling fluid temperature (ECT).

 

 

Intake

There is also the variable phasing map, the intake is adjusted according to the engine RPM and air rate.