C13, C15, and C18 Engines Troubleshooting – ARD Fuel Pressure Is High

System Operation Description:

This procedure covers the following diagnostic trouble codes:

Note: Refer to Troubleshooting, “Cat ET Service Features” for information about service features.

Note: Some of the following codes may not be applicable for certain applications.

Table 1
Diagnostic Trouble Codes
CDL Code J1939 Code Code Description Comments
E1050 (1) 3480-15 High Aftertreatment #1 Fuel Pressure #1 There are Enhanced Troubleshooting Indicators for this code.
E1050 (2) 3480-16 High Aftertreatment #1 Fuel Pressure #1 There are not Enhanced Troubleshooting Indicators for this code.
E1051 (1) 4077-15 High Aftertreatment #1 Fuel Pressure #2 There are Enhanced Troubleshooting Indicators for this code.
E1051 (2) 4077-16 High Aftertreatment #1 Fuel Pressure #2 There are not Enhanced Troubleshooting Indicators for this code.
Table 2
Required Parts for Use with a 11/16 Fitting
8T-0855 Pressure Gauge
8T-8902 Tee
228-7089 O-Ring Seal (Tee)
6V-4144 Quick Connect Coupler
6V-3965 Fitting
3J-1907 O-Ring Seal
Required Parts for Use with a 9/16 Fitting
7X-2444 Swivel Tee
214-7568 O-Ring Seal (Tee)
6V-3965 Fitting
3J-1907 O-Ring Seal
8T-0855 Pressure Gauge
6V-4144 Quick Connect Coupler
Optional Parts
177-7860 Hose As
177-7861 Hose As
177-7862 Hose As
126-6872 9/16 Tee
8C-3309 11/16 Tee
Table 3
Troubleshooting Test Steps Values Results
1. Check the Current Flow to the Heating Element in the ARD Combustion HeadA. Start the engine. Check the current flow to the heater. Refer to Systems Operation/Testing and Adjusting, “ARD Nozzle Heater – Test” for the correct procedure. Current check Result : The current flow is between 7.0 A and 14 A for a 12 V system. Or, the current flow is between 3.5 A and 7 A for a 24 V system.The current flow is OK. Proceed to Test Step 2.

Result : The current flow is not between 7.0 A and 14 A for a 12 V system. Or, the current flow is not between 3.5 A and 7 A for a 24 V system.

Repair : There may be a problem with the ARD nozzle. Refer to Troubleshooting, “ARD Nozzle Heater – Test”.

STOP

2. Perform an ARD Ignition Test and Record the Enhanced Troubleshooting Indicator (ETI)A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM). Refer to Troubleshooting, “Electronic Service Tools”, if necessary.

B. Perform an ARD Ignition Test using Cat ET. Refer to System Operation and Testing and Adjusting, “ARD Fuel System – Test”.

C. The ETI code is located in the “Status” screen under “Enhanced Troubleshooting Information (ETI) – ARD”. Record the Enhanced Troubleshooting Indicator (ETI) code.
ETI codes are not available for (2) codes.

ETI code Result : There is not an ETI code.Proceed to Test Step 3.

Result : The ETI code was recorded.

Proceed to Test Step 3.

Note: The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.

Table 4
Troubleshooting Test Steps Values Results
3. Check the Fuel Diverter ValveA. Turn the engine OFF.

B. Disconnect the ARD fuel line from the pump.

C. Install the required parts listed in Table 2 at the outlet port of the pump.

D. Turn the keyswitch to the ON position.

E. Establish communications between Cat ET and the ECM.

F. Clear the active event code or the override will not activate.

G. Select Fuel Priming Command Override in Cat ET in order to activate the pump.

H. Override the pump and record the pressure from the pressure gauge.

I. Deactivate the override.

J. Turn the keyswitch to the OFF position.

Pressure Checkout Result : The pressure reading was greater than 758 kPa (110 psi).Repair : Replace the diverter valve. Perform an “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”.
The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.Result : The pressure reading was less than
758 kPa (110 psi).Proceed to Test Step 4.


Illustration 2 g03043381
(1) Diverter Valve

(2) Pump

(3) Regulator

(4) Base Assembly


Illustration 3 g03043382
(5) Outlet port of the pump

Table 5
Troubleshooting Test Steps Values Results
4. Check the PumpA. Start the engine.

B. Clear the active event code or the override will not activate.

C. Select the “Aftertreatment Fuel Pump Relay Override” in Cat ET in order to activate the pump.

D. Override the pump and record the pressure from the pressure gauge.

E. Deactivate the override.

F. Turn the keyswitch to the OFF position.

G. The pressure must be within specifications. The pump pressure must be
1900 ± 120 kPa (275.5 ± 17.4 psi).

Pump Checkout Result : The pressure measured greater than
1900 ± 120 kPa (275 ± 17.4 psi).Repair : Replace the pressure regulator. Perform an “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”.The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.

Result : The pump is within specifications.

If you are troubleshooting an E1050 (1) or E1051 (1) code with an ETI of 5 or 6, Proceed to Test Step 5.

Result : The pump is within specifications.

If you are troubleshooting an E1050 (1) code with an ETI of 1 or an E1050 (2), Proceed to Test Step 6.

Result : The pump is within specifications.

If you are troubleshooting an E1051 (1) code with an ETI of 1 or an E1051 (2), Proceed to Test Step 7.

ETI codes are not available for (2) codes.


Illustration 4 g03043384
ARD head (typical)

(6) Pilot fitting that contains the filter

(7) Main fitting that contains the filter (If equipped)

Table 6
Troubleshooting Test Steps Values Results
5. Replace the Fittings that Contain the Filter in the ARD HeadA. Replace the fittings that contain the filters in the ARD head.

B. Reset all active codes and clear all logged codes by cycling the keyswitch to the OFF position.

C. Perform the “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”.

Replace filter fittings Result : The “ARD Ignition Test” was successful and no codes were logged.
Return the unit to service.STOP

Result : The “ARD Ignition Test” was not successful and codes were logged.

If troubleshooting an E1050 (1) code with an ETI of 5 or 6 or an E1050 (2) code, Proceed to Test Step 6.

Result : The “ARD Ignition Test” was not successful and codes were logged.

If troubleshooting an E1051 (1) code with an ETI of 5 or 6 or an E1051 (2) code, Proceed to Test Step 7.

Note: The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.


Illustration 5 g03043385
CEM (typical)

(8) Main solenoid valve

(9) Pilot solenoid valve

Table 7
Troubleshooting Test Steps Values Results
6. Replace the Pilot Solenoid Valve

A. Replace the pilot solenoid valve.

B. Reset all active codes and clear all logged codes by cycling the keyswitch to the OFF position.

C. Perform the “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”.

Replace pilot solenoid valve Result : The “ARD Ignition Test” was successful and no codes were logged.
Return the unit to service.

STOP

Result : The “ARD Ignition Test” was not successful.

Proceed to Test Step 8

7. Replace the Main Solenoid Valve

A. Replace the main solenoid valve.

B. Reset all active codes and clear all logged codes by cycling the keyswitch to the OFF position.

C. Perform the “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”.

Replace main solenoid valve Result : The “ARD Ignition Test” was successful and no codes were logged.
Return the unit to service.

STOP

Result : The “ARD Ignition Test” was not successful.
Proceed to Test Step 8

8. Replace the ARD Head

A. Replace the ARD head.

B. Reset all active codes and clear all logged codes by cycling the keyswitch to the OFF position.

C. Perform the “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”.

Replace the ARD Head Result : The “ARD Ignition Test” was successful and no codes were logged.
Return the unit to service.

STOP

Note: The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.

Test Step 1.

Complete the procedure in the order in which the steps are listed.

Results:

 

  • The procedure corrected the issue. – STOP 
  • The procedure did not correct the issue. –Repair: Contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).

    STOP

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