Toyota Diesel Common Rail

Toyota Diesel Frequent Rail automobiles include a excessive stress system that reduces gas consumption, in addition to minimal polluting emissions. The system consists of a Denso high-pressure pump, a set of injectors on a standard rail, and a pc that processes info from sensors and actuators.

These diesel engines are the evolution of conventional diesel engines. Right here the distinction lies within the ranges of excessive stress that the system can face up to.

Along with its fashionable digital programs that enable excessive efficiency in several situations.

However how complicated is the system for its upkeep? To resolve this query, we’re going to clarify intimately the operation of the system, in addition to the process for altering the excessive stress pump.

Toyota Frequent Rail Diesel System

As we talked about earlier, the excessive stress diesel system that comes from the Toyota producer has particular traits.

To start with, the system raises the stress to a better stage, in comparison with different producers (1800 Bars virtually 26,000 to 30,000 Psi).

For this, the system has prime quality elements from the Denso model. The primary part that stands out is the ECU or Pc.

The pc is extraordinarily vital as it’s the mind of all the engine operation. Denso has digital administration with excessive information processing capability.

The software program or firmware of this laptop permits to manage voltages, amperages and information in actual time of the injection.

The second part that stands out are the excessive stress injectors. The injectors have an prolonged vary of life below good high quality gas situations.

To increase the life of those injectors it’s endorsed to make use of gas with licensed high quality exams. In addition to altering the primary gas filter. This filter contains a water entice that collects water in a built-in reservoir.

This filter has a handbook water entice drain operate, and in addition whenever you change this filter, it’s essential to schedule the filter change on the dashboard based on the mileage advisable by the service handbook.

If this programming will not be carried out, a warning mild will robotically come on indicating that it’s essential to change the filter.

Denso Toyota Excessive Stress Pump โ€“ Pump Operation and Alternative

The denso pump fitted to Toyota automobiles, for instance HILUX 1KD โ€“ 2KD, is a piston kind pump. This pump works by rotating the shaft, with an eccentric cam that enables the alternating motion of the pistons contained in the pump.

Excessive stress pump operation.

The operation of the pump is easy. The shaft with eccentric cam is moved by the combustion engine, every time the eccentric turns it permits the alternating motion of the pistons, every of the pistons has an consumption valve and an exhaust valve.

Eccentric lever

The consumption valve communicates with the switch stress line coming from a gear pump put in in the identical pump meeting.

The passage of fluid to the consumption valves is managed by a valve (Solenoid) that’s electronically managed by the ECM or ECU. This sign is by pulses, and relies upon largely on the stress that the system needs to generate, this valve is named SCV Suction Management Valven.

Every time the pistons obtain the fluid by the consumption valve on the down stroke of the piston, they fill the chamber with gas, on the following motion of the piston pushed by the eccentric, it compresses the gas by opening the exhaust valve and sending the fluid on to the rail stress, the place the ECM electronically measures the stress with the FRP rail stress sensor. This stress is named excessive stress and might attain as much as 1800 Bars.

Within the decrease picture you’ll be able to see the element of every of the weather.


These components may be seen in {a photograph} of the pump proven beneath. It’s price clarifying that when this technique suffers inside harm, the service handbook requests to alter the entire set of the pump together with the excessive stress pipes.

Pressure Pump

Effectively, as in these programs, the stress management is totally digital, there are a collection of changes that the ECM makes, repeatedly, on the pump system. A big a part of these changes are centered on the share of digital management that the system performs on the valve.

Curso Diesel Frequent Rail.

On the time of fixing the pump for a brand new or used one, there’s an adjustment worth carried over with the earlier pump and this information is saved within the ECM.

These working values โ€‹โ€‹of the used pump may cause system malfunction.

The issues mainly come up as a result of the pc sends working alerts from a worn out pump to a model new pump.

To carry out a knowledge correction within the ECU and inform it that we’re performing the pump substitute, it’s essential to carry out an digital adjustment process, which is carried out with the suitable scanner.

Nevertheless, we are going to element a handbook process for the case of TOYOTA.

The steps required to carry out this process are defined beneath.

Steps to alter a Diesel Frequent Rail excessive stress pump in Toyota

1. With the ignition change OFF, I made a JUMPER bridge, it may be with a cable or a metal click on, between terminals 4 and 13 of the 16-pin connector kind OBD II, which is positioned within the footwell of the automobile. driver below the instrument console, the photograph exhibits that are the pins of this process.

Diesel High Pressure Pump

2. Flip the ignition change to the ON place, the test engine on the sprint ought to come on and flash.

3. Go away on this situation (contact ON) for precisely three minutes.

4. After this time, flip the ignition change to the OFF place.

5. Take away the bridge that had been made between terminals 4 and 13 of the 16-pin DLC connector.

6. Begin the engine with out accelerating, if it doesn’t begin for any purpose, proceed to hold out the method once more from step 1.

7. Let the engine freewheel with out accelerating till the next situations are reached. Water temperature 60 levels Celsius minimal. Gasoline temperature 20 levels Celsius minimal.

8. Initialization is completed.

Toyota Diesel Frequent Rail