12000-ZV7-000ZA Honda BLOCK ASSY., CYLINDER *NH8* (DARK GRAY) (Honda Code 4437810).

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 Head
A. 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. Clear "Active" codes using Cat ET.
C. Perform an ARD Ignition Test using Cat ET. Refer to System Operation and Testing and Adjusting, "ARD Fuel System - Test".
D. 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.
Illustration 1 g03178918
Table 4
Troubleshooting Test Steps    Values    Results    
3. 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. 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