C13, C15, and C18 Tier 4 Interim Engines ARD Fuel Pressure Is High Caterpillar

ARD Fuel Pressure Is High

C13, C15, and C18 Tier 4 Interim Engines [KENR6849]

C13, C15, and C18 Tier 4 Interim Engines Soot Sensor - Test

C13, C15, and C18 Tier 4 Interim Engines ARD Fuel Pressure Is Low

FUEL SYSTEM

CONTROL GP-FUEL

C13, C15, and C18 Tier 4 Interim Engines ARD Fuel Supply - Test

C13, C15, and C18 Tier 4 Interim Engines ARD Fuel Pressure Is High

C13, C15, and C18 Tier 4 Interim Engines ARD Fuel Pressure Is Low

System Operation Description:

This procedure covers the following diagnostic trouble codes:

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

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Table 1
J1939 Code	CDL Code	Comments
3480-15 Aftertreatment #1 Fuel Pressure #1 : High - least severe (1)	E1050 (1) High Aftertreatment #1 Fuel Pressure #1	There are Enhanced Troubleshooting Indicators for this code.
3480-16 Aftertreatment #1 Fuel Pressure #1 : High - moderate severity (2)	E1050 (2) High Aftertreatment #1 Fuel Pressure #1	There are not Enhanced Troubleshooting Indicators for this code.
4077-15 Aftertreatment #1 Fuel Pressure #2 : High - moderate severity (1)	E1051 (1) High Aftertreatment #1 Fuel Pressure #2	There are Enhanced Troubleshooting Indicators for this code.
4077-16 Aftertreatment #1 Fuel Pressure #2 : High - moderate severity (2)	E1051 (2) High Aftertreatment #1 Fuel Pressure #2	There are not Enhanced Troubleshooting Indicators for this code.

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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

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Table 3
Troubleshooting Test Steps	Values	Results
1. Check the Current Flow to the Heating Element in the ARD Combustion Head A. Start the engine. Check the current flow to the heater. Refer to Systems Operation/Testing and Adjusting, "ARD Nozzle Heater (Current) - 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. Verify fuel filter maintenance procedure. A. Verify that the engine fuel filters were changed at the correct service interval.	Fuel Filter	Result: Fuel filters were changed at correct previous service interval. Proceed to Test Step 3. Result: Fuel filters were not changed at correct previous service interval. Repair: Replace fuel filters. Perform an "ARD Ignition Test" using Cat ET. Refer to System Operation, Testing and Adjusting, ARD Fuel System - Test.
3. Perform an ARD Ignition Test and Record the Enhanced Troubleshooting Indicator (ETI) A. Establish communication between Cat^® 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 4. Result : The ETI code was recorded. Proceed to Test Step 4.

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.

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Illustration 1	g03178918

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Table 4
Troubleshooting Test Steps	Values	Results
4. Check the Fuel Diverter Valve A. 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. Establish communication between Cat ET and the engine ECM. Select "Fuel Priming Command Override" or use the manual priming switch (if equipped) to activate the ARD fuel 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 5.

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Illustration 2	g03777817
(1) Diverter Valve (2) Pump (3) Regulator (4) Base Assembly

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Illustration 3	g03777824
(5) Outlet port of the pump

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Table 5
Troubleshooting Test Steps	Values	Results
5. Check the Pump A. 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 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 fuel pressure regulator located in pump base. Refer to Specifications in SIS for correct installation torque 28 ± 3 N·m (248 ± 27 lb in). 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 6. 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 7. 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 8. ETI codes are not available for (2) codes.

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Illustration 4	g03777829
ARD head (typical) (6) Pilot fitting that contains the filter (7) Main fitting that contains the filter (If equipped)

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Table 6
Troubleshooting Test Steps	Values	Results
6. Check for Electrical Power at the ARD Fuel Pump A. Turn the keyswitch to ON. Do not start the engine. B. Establish communication between Cat ET and the ECM. Select "Fuel Priming Command Override" to activate the ARD fuel pump. Refer to Troubleshooting, "Cat ET Services Features" for information about service features. C. Check for voltage between pin 1 and pin 2 on the connector to the fuel priming pump. Check the voltage while the pump is in override. Voltage is not present unless the pump is priming. D. Deactivate the override. E. Turn the keyswitch to OFF. F. Check the voltage at the battery.	ARD Fuel Pump Relay voltage	Result: The voltage at the ARD fuel pump is within 3 VDC of the battery voltage when the override is active and 0 VDC when the override is deactivated. Proceed to Test Step 7. Result: The voltage at the ARD fuel pump is within 3 VDC of the battery voltage when the override is active within 3 VDC when the override is deactivated. Repair: Replace the ARD Fuel Pump relay. 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.

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Illustration 5	g03777830
CEM (typical) (8) Main solenoid valve (9) Pilot solenoid valve

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Table 7
Troubleshooting Test Steps	Values	Results
7. Check the Pilot Solenoid Valve A. Disconnect the pilot fuel line from the ARD head and place it into a bucket. B. Turn the keyswitch to the ON position. Establish communication between Cat ET and the ECM. Disable ARD Regens. C. Start the engine. D. Select the "Aftertreatment Fuel Pump Relay Override" to activate the pump. E. Observe the fuel line in the bucket for fuel draining into the bucket. F. Turn the keyswitch to the OFF position.	Check Pilot Solenoid Valve	Result: Fuel was observed leaking into the bucket. Repair: Replace the Pilot Solenoid Valve. STOP. Result: No fuel was observed leaking into the bucket. Reconnect the pilot fuel line to the ARD head. Proceed to Test Step 9.
8. Check the Main Solenoid Valve A. Disconnect the main fuel line from the ARD head and place it into a bucket. B. Turn the keyswitch to the ON position. Establish communication between Cat ET and the ECM. Disable ARD Regens. C. Start the engine. D. Select the "Aftertreatment Fuel Pump Relay Override" to activate the pump. E. Observe the fuel line in the bucket for fuel draining into the bucket. F. Turn the keyswitch to the OFF position.	Check Main Solenoid Valve	Result: Fuel was observed leaking into the bucket. Repair: Replace the Main Solenoid Valve. STOP. Result: No fuel was observed leaking into the bucket. Reconnect the main fuel line to the ARD head. Proceed to Test Step 9.
9. 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.

STOP

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