Tag: Caterpillar Topics

This instruction show you guide on how to solve Caterpillar C9 engine excessive injection actuation pressure error.

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The Engine Control Module (ECM) detected the following conditions:

-The injection actuation pressure is greater than 30 MPa (4351 psi) for more than six seconds.

-Engine speed is greater than O MPH.

-Engine coolant temperature is more than 18 °C (64 °F).

The ECM has been powered for at least three seconds.

-Cold mode is not active.

 

The injection actuation pressure sensor measures the pressure of the oil in the high pressure oil manifold.The high pressure oil in the manifold is used to actuate the injectors and high pressure oil is used to control the fuel injection pressure.Fuel injection pressure is based on inputs from the sensors.The inputs are used by the engine control module ECM for calculating the fuel injection pressure.The ECM uses the reading from the injection actuation pressure sensor in order to control the operation of the injection actuation pressure control valve.

 

Probable Causes:

1) Oil leaks in the HEUI rail

2) Low engine oil level

3) Injection actuation pressure sensor failure

4) Wiring harness between ECM and the fuel injectors

5) ECM Failure

6) Low fuel pressure while cranking (below 25 PSI)

7) Injector failures or Injector o-ring failures

8) Unit injector hydraulic pump

CAT ET 2025A Traction Brake Test function allows the Step, Bleed, and Ramp tests to be performed on a selected brake line. A brake may be manually turned on and monitored.This instruction show you guide on how to use CAT ET 2025A to do accessing traction aid brake test for Caterpillar machine.

 

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Note:The test will not work if the machine speed is over 3 mph. This prevents the brake from overheating.

 

Accessing

To run the Traction Aid Brake Test, select “Diagnostic Test” from the Diagnostics menu, and then select “Brake Test” from the submenu. The Traction Aid Brake Test screen is displayed.

 

Screen Layout

The Traction Aid Brake Test screen has the following areas:

 

Status Parameter Area

There are four status parameter boxes: Left Front Brake Test, Right Front Brake Test, Left Rear Brake Test, and Right Rear Brake Test. Each box includes the following information:

Test Status – Displays the selected test type: Bleed, Ramp, or Step. If a test has not been selected, No Test is displayed.

Current Test Icon – Displays as a visual representation of the selected test.

Desired Pressure Value – Displays as a value measured in PSI (kPa).

 

Wheel Selection Area

The Wheel Selection area is located in the center of the screen. This area allows the user to select the wheel corresponding with the brake to be tested by clicking the radio button next to the wheel name. The Wheel Selection options are:

Front Left Wheel – corresponds with the Left Front Brake Test

Front Right Wheel – corresponds with the Right Front Brake Test

Back Left Wheel – corresponds with the Left Rear Brake Test

Back Right Wheel – corresponds with the Right Rear Brake Test

 

Buttons

The buttons available in the Traction Aid Brake Test screen are:

Stop 

Stop All 

Bleed 

Ramp 

Step 

The Engine Control Module(ECM) detects the following conditions:

The injection actuation pressure is greater than 3 MPa (435 psi) for more than three seconds when the engine is off.

The difference in the actual pressure and the desired pressure is greater than 2 MPa (290 psi) for more than ten seconds with the engine running.

Actual rail pressure is between 11.0 MPa (1595.41 psi) and 17.4 MPa (2523.66 psi) for more than ten seconds.

Sensor current changes more than0.075 Amp and rail pressure changes less than 0.5 MPa (72.5 psi) with the engine on.

The engine is not running and the ECM has been powered for at least four seconds.

Cold mode is not active.

 

Engine speed is 0 rpm for more than 3 seconds and the engine is not running.

The injection actuation pressure sensor measures the pressure of the oil in the high pressure oil manifold. The high pressure oil in the manifold is used to actuate the injectors and the high pressure oil is used to control the fuel injection pressure. Fuel injection pressure is based on inputs from the sensors. The inputs are used by the Engine Control Module (ECM) for calculating the fuel injection pressure. The ECM uses the reading from the injection actuation pressure sensor in order to control the operation of the injection actuation pressure control valve.

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Probable Causes:

1) ECM Connection

2) Injection actuation pressure sensor

3) Injection actuation pressure sensor wiring/connection

CAT ET Injector Solenoid Test function can be used to verify the operation of the injector solenoid on one or all cylinders. Similarly, the Intake Valve Actuator Solenoid test can be used to verify the operation of the intake valve actuator solenoid on one or all cylinders. These tests provide a method for finding wiring or solenoid problems, and they are performed in the same manner. When either test is completed, the data can be analyzed to determine if all of the cylinders are running effectively.

 

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Accessing

To run the Injector Solenoid Test, select “Diagnostic Tests” from the Diagnostics Menu, and then select “Injector Solenoid Test” from the sub-menu. The test screen is displayed.

 

To run the Intake Valve Actuator Solenoid test, select “Diagnostic Tests” from the Diagnostics Menu, and then select “Intake Valve Actuator Solenoid Test” from the submenu. The test screen is displayed.

 

Screen Layout

The Test Screen has the following areas:

 

Tree Area

The Injector Solenoid Test Tree area lists the available ECMs and the selected diagnostic test.

Note: If more than one diagnostic test is available, the selected test will be highlighted.

Note: The Tree Area is not available when performing the Injector Solenoid test on the ATA data link.

 

Display Area

The Display Area has three columns:

Cylinder/Description – Lists the available cylinder numbers

Mode – Displays the current mode of the cylinder; i.e., whether it is “Powered” or “Cutout”

Test Result – Displays “Open,” “Short,” or “OK” after the test has completed

 

Buttons

The Buttons available on Test screen are:

Change – Click to change the state of the cylinder. Changing the state of the cylinder allows solenoid troubleshooting by “cutting out” and subsequently repowering an individual cylinder.

Power All – Click to return all cylinders to the powered, or active, state.

Cutout All – Click to change the state of all cylinders to cutout.

Start – Click to begin the test. Once clicked, this button is disabled until the test is stopped.

Stop – Click to stop the test. Once clicked, this button is disabled until the test is restarted.

Caterpillar C9 engine PID 186-4 PTO engine shutdown switch voltage low solution.

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A short to ground exists in the wiring for the PTO engine shutdown switch. The parameter “PTO Engine Shutdown Switch” must be programmed to “J1/P1:7” or “J1/P1:23”.

 

 

If the vehicle speed is not equal to zero, or if there are active vehicle speed faults, the engine will go to low idle. The engine will not shut down when the vehicle speed falls to zero. When the PTO engine shutdown switch is pressed, a 186-14 will become active. The code will stay active until the engine shuts down. When the engine shuts down, the code will be loggged.

 

Possible Causes:

1) ECM Connection/Harness

2) PTO Shutdown Switch Failure

3) ECM Failure

4) Wiring between PTO shutdown switch and ECM

Caterpillar ET Service Tool diagnostic software Auto Retarder Test function allows the operation of the Auto Retarder Control (ARC) system to be verified while the machine is stationary. The ARC outputs are activated and monitored for correct operation.

 

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Accessing

To run the Auto Retarder Test function, select “Diagnostic Tests” from the Diagnostics menu, and then select “Auto Retarder Test” from the submenu. The Auto Retarder Test will be displayed.

 

Screen Layout

The Auto Retarder Test screen has the following areas:

 

Display Area

The Auto Retarder Test display area has three columns:

Description – Provides the name of the parameter set to run the test

Required Condition – Displays the value that the parameter must meet in order to run the test.

Actual Value – Displays the actual value of the required condition parameters.

 

Status Parameter Area

The Auto Retarder Test status parameter area lists parameters and their current values. The ARC Control Solenoid displays the position in percentage of the ARC Control Solenoid. The ARC Pressure Switch Status displays if the status is “High” or “Low.”

 

Status Line

The Auto Retarder Test status line displays if the test is “On” or “Off.”

 

Buttons

The buttons available in the Auto Retarder screen are:

Start – Click to start the test. When clicked, “On” will be displayed in the status line, and the button will be disabled until the test is stopped.

Stop – Click to stop the test. When clicked, “Off” will be displayed in the status line, and the button will be disabled until Start is clicked again.