STEP AS 5392785 - Caterpillar

Illustration 3 g03751197
(1) Diverter Valve
(2) Pump
(3) Regulator
(4) Base Assembly
Illustration 4 g03751240
(5) Outlet port of the pump
Table 5
Troubleshooting Test Steps Values Results
4. Check the Pump
A. Start the engine.
B. Clear the active event code or the override will not activate.
C. Connect to the Engine #1 Aftertreatment ECM using Cat ET.
D. Select the "Aftertreatment Fuel Pump Relay Override" to activate the pump.
E. Override the pump and record the pressure from the pressure gauge.
F. Deactivate the override.
G. Turn the keyswitch to the OFF position.
H. The pressure must be within specifications. The pump pressure must be 1900 120 kPa (275.5 17.4 psi).
Pump
Result: The pressure measured greater than 1900 120 kPa (275 17.4 psi).
Result : 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 5 g03751256
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
Note: This step may only apply to certain machines. If the machine being worked on does not contain the fittings with the filter inside, proceed to Test Step 6.
5. Replace the Fittings that Contain the Filter in the ARD Head
A. 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 6 g03751279
CEM (typical)
(8) Main solenoid valve
(9) Pilot solenoid valve
Table 7
Troubleshooting Test Steps Values Results
6. Replace the Pilot Solenoid Valve
A.