0172855 JOHNSON RESERVOIR AND "O" RING ASSY

Table 1
Diagnostic Trouble Code for ARD Loss of Combustion    
CDL Code     Description     Notes    
E1026-1     Aftertreatment #1 Loss of Combustion : Level 1     This code indicates that the Aftertreatment Regeneration Device (ARD) has stopped generating heat 4 or more times during an active high speed regeneration.
Other diagnostic trouble codes may indicate the cause of the loss of combustion. The codes are listed in the troubleshooting procedure.
The code must be cleared with the "Reset All" button on the active diagnostics screen in the electronic service tool. If an active regeneration is initiated with the forced regeneration button on the control console, the Electronic Control Module (ECM) clears this code automatically.    
E1026-2     Aftertreatment #1 Loss of Combustion : Level 2     This code indicates that the ARD has stopped generating heat 4 or more times during an active regeneration.
Other diagnostic trouble codes may indicate the cause of the loss of combustion. The codes are listed in the troubleshooting procedure.
The code must be cleared with the "Reset All" button on the active diagnostics screen in the electronic service tool. If an active regeneration is initiated with the forced regeneration button on the control console, the Electronic Control Module (ECM) clears this code automatically.    System OperationThe combustion air system routes pressurized air from the outlet of the high-pressure turbocharger to the ARD. The combustion air is mixed with fuel inside the ARD combustion head. The air/fuel mixture is ignited and the air/fuel mixture is burned in order to increase the temperature of the exhaust gas. The high temperature exhaust gas burns off the soot in the Diesel Particulate Filter (DPF). This process is known as DPF regeneration.The ECM sends a pulse width modulated signal to the combustion air valve. The actuator in the combustion air valve regulates the combustion air to the ARD combustion head.The ECM also sends pulse width modulated signals to the pilot fuel control valve and the main fuel control valve. The fuel control valves regulate the amount of fuel that is injected into the ARD combustion head.If the amount of fuel or air that enters the ARD combustion head is incorrect, combustion may not occur.Test Step 1. Check for Associated Diagnostic Trouble Codes
Establish communication between the electronic service tool and the engine ECM.
Table 2 lists the diagnostic codes that are associated with "E1026-1 Aftertreatment #1 Loss of Combustion" code. Determine if any of the codes in Table 2 are present.
Table 2
Associated Diagnostic Codes    
CDL Code     Description     Associated Diagnostic Procedure    
2489-7     ARD Air Pressure Control Actuator : Not Responding Properly     Solenoid Valve - Test    
E1050-2     High Aftertreatment #1 Fuel Pressure #1 : Level 2     ARD Pilot Fuel Pressure Is High    
E1052-1     Low Aftertreatment #1 Fuel Pressure #1 : Level 1     ARD Pilot Fuel Pressure Is Low    
E1052-2     Low Aftertreatment #1 Fuel Pressure #1 : Level 2     ARD Pilot Fuel Pressure Is Low    
E1045-2     Low Intake Manifold Pressure : Level 2     Intake Manifold Air Pressure Is Low    
E1070-1     Aftertreatment Fuel Injector #1 : Not Responding     ARD Nozzle Heater - Test    Results:
An associated diagnostic trouble code is not present. - Proceed to Test Step 2.
An associated diagnostic trouble code is present. - Repair: Refer to Troubleshooting, "Diagnostic Trouble Codes" in order to troubleshoot the associated diagnostic code.STOPTest Step 2. Check the Current Flow Through the Heater
Verify that the engine is off. Check the current flow through the heater. Refer to Systems Operation/Testing and Adjusting, "ARD Nozzle Current - Test" for the correct procedure. Expected Result:The current flow is above 3.5 Amps.Results:
The current flow is above the expected amount. - The current flow is OK. Proceed to Test Step 3.
The current flow is below the expected amount. - The current flow is low.Repair: Determine the cause of the low current flow. Refer to Troubleshooting, "ARD Nozzle Heater - Test".STOPTest Step 3. Perform a Service RegenerationNote: This test must be performed through the electronic service tool. The electronic service tool enhances the diagnostics during the service test.
If a E993-2 code is active, clear the code. The ARD will not light if the code is active.
Click the "Disconnect" icon on the electronic service tool in order to disconnect the electronic service tool from the engine.
Turn the keyswitch to the OFF position. Wait for 5 seconds.
Turn the keyswitch to the ON position.
Click the "Connect" icon on the electronic service tool in order to connect the electronic service tool to the engine.
Start the engine. Allow the engine to idle for 3 minutes.
Start a service regeneration by selecting the following menus on the electronic service tool:
"Service"
"Service Procedures"
"Manual Diesel Particulate Filter Regeneration"The electronic service tool will display a "Waiting On Requirements" window. The ECM will automatically elevate the engine speed. The duration of the service regeneration depends on the soot load in the DPF. The ECM will automatically return the engine speed to low idle after the service regeneration is complete.Note: The ECM tests the nozzle for plugging after the service regeneration is complete. An E1070-1 Aftertreatment Fuel Injector #1 : Not Responding code will become active if the nozzle is plugged.Expected Result:The service regeneration has been successfully completed.Results:
The service regeneration completes successfully. - STOP
The service regeneration did not complete successfully. - Repair: Check the list of active diagnostic codes. Troubleshoot the code that applies to the failed regeneration. Refer to Test Step 1 for associated codes.
The service regeneration did not complete successfully and there are no associated codes. - Proceed to Test Step 4.Test Step 4. Perform an ARD Air System Service TestUse the electronic service tool to perform the ARD Air System Service Test.Expected Result:The ARD Air System Service Test completes successfully.Results:
The test completed successfully and did not have any associated codes. - Proceed to Test Step 5.
The ARD Air System Service Test did not complete successfully. Also, there are associated diagnostic trouble codes. - Repair: Refer to Troubleshooting, "Diagnostic Trouble Codes" in