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

A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, “Electronic Service Tools”, if necessary.

B. Check for associated diagnostic trouble codes.

A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, “Electronic Service Tools”, if necessary.

B. 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) or -18 codes.

A. Check for external leaks. Inspect the fuel lines from the pump to the fuel manifold. Check for pinched lines or leaking lines.

A. Turn the keyswitch to the ON position. Do not start the engine.

B. Establish communication between Cat ET and the ECM. Select “Fuel Priming Command Override” or use the manual priming switch (if equipped) in order to activate the ARD fuel pump. Refer to Troubleshooting, “Cat ET Service 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 the OFF position.

F. Check the voltage at the battery.

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.

Start the engine.

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

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

Deactivate the override.

Turn the keyswitch to the OFF position.

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

A. Replace the filter for the ARD fuel manifold.

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

C. Perform the “ARD Ignition Test” by 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 “ARD Ignition Test” was not successful.
If you are troubleshooting an E1052 (1) or 3480-17 code with an ETI of 2, Proceed to Test Step 7.

Result: The “ARD Ignition Test” was not successful.
If you are troubleshooting an E1053 (1) or 4077-17 code with an ETI of 2, Proceed to Test Step 8.

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”. Refer to Troubleshooting, “ARD Ignition – 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.

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”. Refer to Troubleshooting, “ARD Ignition – 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.