The ECM commands the control valve to close. The Engine Control Module ( ECM ) supplies 5 volts to the sensor via the 5-volt reference circuit and provides ground via the low reference circuit. The oil is released into the space underneath the valve cover and the rail pressure is reduced. The intake valve actuator is activated by an electric solenoid. Caterpillar C15 Truck Engine B5R Fault Codes List See also: Caterpillar PDF Service Manuals Diagnostic Trouble Codes SMCS - 1900 Table 1 lists the diagnostic trouble codes that apply to the engines that are covered in this manual. Pressurized engine oil flows from the rail to each actuator. Fuel Tank Pressure Sensor (FTPS) 14. Carefully remove the control valve from the engine. (23) Bottom of the tube for the oil supply to the rail. Proceed to Test Step 10. Section view of the components. Illustration 10 g01329453 1. If the pressure is constant throughout the rpm range, there is a problem with the circuit for the engine oil pressure sensor. caterpillar c13 oil pressure sensor location. Illustration 10 g02760158 Unfortunately I have seen this code many times. There are additional codes. The piston contacts rocker arm (58) . Do not crank the engine for more than 30 seconds. The ECM determines if the changes in rail pressure are correct for the commands that were sent to a particular solenoid. ETC Motor [integrated into ETC Module] 17. The following diagnostic codes indicate that there is a mechanical problem or an electrical problem with the system: Illustration 1 g02725693 The locations where oil should not flow on C18 engines are shown in Illustrations 7, and 8. Purge Orifice – purge orifice (16) allows air to purge from the actuator. Result: One or more cylinders failed the “Cylinder Cutout Test”. Result: The spool was fully closed when the control valve was removed from the engine. The system contains the following components: Check Valve (53) – Pressurized engine oil flows to a rail inside the valve cover base. (26) Joint between the quill tube and the jumper tube, (27) Face seal between the jumper tube and the valve cover base. Result: One or more cylinders indicate “Not OK”. Missing O-ring seal or damaged O-ring seal The spool is normally closed. E. Remove the intake valve actuation pressure sensor from the valve cover base. Refer to Troubleshooting for the correct procedure. Replace the check valve. The actuators use the pressurized engine oil and electrical commands from the ECM in order to delay the closing of the intake valves. This can be caused by the following conditions: Engine Intake Valve Actuation System Oil Pressure : Not Responding Properly. 6-22. step 2 = repeat step 1. step 3 = + 120 degrees. Your email address will not be published. This code can be caused by three things. 3. Refer to Illustration 10. It's possible that they are . This code indicates that the difference in rail pressure is incorrect while the control valve is opened and closed. Sounds like your on the gremlin chase just like i was, your code 95 is your # 6 intake valve actuator, or iva system oil pressure, 93 is your #3 or#4 (IVA) This is a general application code for either 1, they are tied together. J. A. Verify that the repair has eliminated the problem in the cylinder. The intake valve actuator is not responding correctly to the commands from the ECM. The sensor is the most common item that causes this fault. Refer to Table 1 for the diagnostic codes that do not require replacement of the intake valve actuation pressure sensors. 1/4 to 1/4 Male NPT The following problems can cause oil to flow from these locations: Access the “Cylinder Cutout Test” in the “Diagnostic Tests” under the “Diagnostics” menu. These sensors failing are very common on C15 ACERT engines. 4. 36s - … Access the “Intake Valve Actuator Test” in the “Diagnostic Tests” under the “Diagnostic” menu. Allow the engine to operate until the coolant temperature is at least The intake valve actuator is a hydraulic system that uses the engine oil to operate. When the diagnostic codes that are associated with the intake valve actuation pressure sensor are logged or if the codes are active, Do Not replace the 224-4535 Pressure Sensor Gp or the 248-2168 Pressure Sensor Gp . Avoid costly engine repairs and maintain performance with this low oil pressure sensor … The actuators use the pressurized engine oil and electrical commands from the ECM in order to delay the closing of the intake valves. Check the intake valve actuator system for debris that could restrict the flow of oil. Disconnect the connectors for the speed timing sensors. Refer to Troubleshooting, “Electronic Service Tools” for more information, if necessary. D. Disconnect the connector for the intake valve actuation pressure sensor. If the problem has not been eliminated, proceed to Test Step 2. The ECM activates a code if the pressure difference is too low. When the valve is fully open, the spool blocks approximately 40 percent of the hole. You may need to apply a load to the engine in order to verify that the problem is resolved. It has three wires. The ECM monitors the rail pressure. The system does not operate until the engine has reached normal operating temperature. Right side view of the rear of a typical C18 engine. Illustration 7 g01313403 Component location. This can be caused by the following conditions: There is an oil leak in the system. 2. Use the Caterpillar Electronic Technician (ET) in order to determine the codes that are active or logged. The pressure relief valve is in the oil pump, in which case, you have to drop the oil pan,and take off the oil pump. On the LKW engine P055B "Intake Camshaft Position Actuator Oil Pressure Sensor Performance" refers to the cylinder head oil pressure sensor. This causes the piston to move down. The IVA housings DO NOT open the intake valves letting exhaust back into the intake. The sensor is the most common item that causes this fault. Illustration 8 g01317964 The following conditions can cause this code: A control valve that contains debris or a control valve that is not operating correctly. The cartridge assembly contains a spool. The ECM commands the control valve to close when the coolant temperature exceeds 20 °C (68 °F). In addition to the pressure regulating assembly, the technician will need a digital multimeter and two 7X-1708 Multimeter Probes . The Engine Intake Valve Actuation System Oil Pressure did not change when the Engine Intake Valve Actuation System Oil Pressure solenoid is toggled. G. Connect the connector for the intake valve actuation pressure sensor to the engine harness. Engine exhaust gases will dilute the incoming air by displacing some of the oxygen in the air being supplied through the intake manifold. The 385-3 is indicating there is an open circuit in the intake valve actuation pressure sensor circuit. Sounds like your on the gremlin chase just like i was, your code 95 is your # 6 intake valve actuator, or iva system oil pressure, 93 is your #3 or#4 (IVA) This is a general application code for either 1, they are tied together. The 385-3 is an open circuit on the Intake Valve Actuation Pressure sensor.

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