38552-ZW5-010 Honda SEE PART DETAILS - PRI; BRACKET, RELAY (Honda Code 7494065).

Table 1
Diagnostic Trouble Codes for Fuel Rail Pressure Problem
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
157-16 E1173 (2) Engine Injector Metering Rail #1 Pressure: High - moderate severity (2) No other 157-XX or 1797-XX codes are active.
3510-XX or 2131-XX codes are not active.
No codes for the high-pressure fuel pump or the injectors are active.
The fuel rail pressure is above an acceptable level.
The code is logged.
Engine power is derated.
157-18 E1174 (2) Engine Injector Metering Rail #1 Pressure: Low - moderate severity (2) No other 157-XX or 1797-XX codes are active.
3510-XX or 2131-XX codes are not active.
No codes for the high-pressure fuel pump or the injectors are active.
The fuel rail pressure is below an acceptable level.
The code is logged.
Engine power is derated. A 157–16 (E1173(2)) or 157–18 (E1174(2)) diagnostic code can be active or logged due to a fuel flow rate restriction in the low-pressure fuel system. The code that is active or logged depends on the engine operating conditions.Probable Causes
Diagnostic codes
Electrical connectors
Fuel filters
Fuel rail pressure sensor
High fuel rail pressure
Transfer Pump Inlet Regulator (TPIR)
Transfer Pump Inlet Regulator (TPIR) return
Return fuel lines
Low fuel rail pressure
Transfer Pump Inlet Regulator (TPIR)
Transfer Pump Inlet Regulator (TPIR) Return
Electric Fuel Lift Pump (EFLP)
Return fuel linesRecommended Actions
Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
Table 2
Troubleshooting Test Steps Values Results
1. Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the Warranty Report and the Product Status Report (PSR) with Histograms before diagnosing the fault.
Note: The downloaded information will be required by the Dealer Solutions Network (DSN) if diagnostic assistance is needed.
C. Determine if a diagnostic code is active or recently logged.
Diagnostic codes
Result: One of the codes in Table 1 is present.
Proceed to Test Step 2.
Result: A code other than the codes in Table 1 is present.
Repair: Troubleshoot the code. Refer to the applicable procedure.
2. Create an Electronic Service Tool Snapshot
A. Select "Snapshot Viewer" on the electronic service tool, using menus: Information -> Snapshot -> Viewer
B. Select the event code and then click "View Graph".
C. Select the following parameter and then click OK.
Engine Speed
D. Select Save to "File to save" a Snapshot File (*.xml). This file will contain all the data in the snapshot and not only the data shown on the graph.
Note: The downloaded information will be required by the Dealer Solutions Network (DSN) if diagnostic assistance is needed.
Snapshot saved
Result: The electronic service tool snapshot was successfully saved.
Proceed to Test Step 3.
Result: The electronic service tool snapshot was not successfully saved.
Contact the DSN for guidance.
3. Electrical Connectors
A. Check for the correct installation of the ECM J1/P1 and the J2/P2 connectors. Check for correct installation of the connector on the Fuel Rail Pressure Sensor and on the Suction Control Valve for the High-Pressure Fuel Pump.
Connectors
Result: There are suspect connectors.
Repair: Use the electronic service tool to perform the "Wiggle Test".
Repair or replace connectors that are suspect.
Result: There are no suspect connectors.
Proceed to Test Step 4.
4. Fuel Filters
A. Replace the in-line fuel filter that is upstream of the electric fuel lift pump (C7.1 engines only) (if equipped). Refer to the Operation and Maintenance Manual for further information. If an in-line fuel filter is not installed, replace the fuel strainer on the fuel tank pickup pipe. Refer to the documentation for the machine.
B. Replace the primary fuel filter and the secondary fuel filters. Refer to the Operation and Maintenance Manual for further information.
C. If equipped, check the Fuel Tank Breather and replace if necessary.
Fuel filters
Result: The filters have been replaced and the fault is eliminated.
Return the unit to service.
Result: The filters have been replaced and the fault is still present.
Proceed to Test Step 5.
5. Fuel Rail Pressure Sensor
Ensure that the pressure in the high-pressure fuel system has been purged before any service or repair is performed on the high-pressure fuel system.
Refer to Operation and Maintenance Manual, High-Pressure Fuel Lines for the time taken for the high-pressure fuel system to be purged.
A. Ensure that the high-pressure fuel system has been purged.
B. Use the electronic service tool to check the status of the "Fuel Rail Pressure".
Pressure sensor
Result: The "Fuel Rail Pressure (absolute)" is more than 5,000 kPa (725 psi) and the pressure is not still decreasing.
Repair: Test the fuel rail pressure sensor. Refer to Troubleshooting, "Sensor Signal (analog, Active) - Test".
Use the electronic service tool to perform the "Fuel Rail Pressure Test." If the test fails, replace the fuel rail. Refer to Disassembly and Assembly, "Fuel Manifold (Rail) - Remove and Install".
Confirm that the fault has been eliminated.
Result: The "Fuel Rail Pressure (absolute)" is less than 5,000 kPa (725 psi).
Proceed to Test Step 6.
6. High-Pressure Fuel Pump Calibration
A. Use the electronic service tool to perform the "High Pressure Fuel Pump Calibration".
Fuel system
Result: Fuel rail pressure is normal after performing the "High Pressure Fuel Pump Calibration".
Use the electronic service tool to perform the "Fuel Rail Pressure Test". If the "Fuel Rail Pressure Test"is successful, return the unit to service.
If the "Fuel Rail Pressure Test" generates additional diagnostic codes, troubleshoot the additional codes. Refer to Troubleshooting, Diagnostic Trouble Codes or Troubleshooting, Event Codes.
If the "Fuel Rail Pressure Test" generates service tool error identifiers, refer to Troubleshooting, Service Tool Error Identifiers.
Result: Fuel rail pressure is still high after performing the "High Pressure Fuel Pump Calibration".
Run the engine for a minimum of 30 minutes.
Proceed to Test Step 7.
7. Fuel System Checks
A. Visually check the fuel tank for fuel.
Note: The fuel gauge may be faulty.
B. Inspect the high-pressure fuel system for leaks.
C. If the temperature is below 0 °C (32 °F), check for solidified fuel (wax).
D. Check the primary filter/water separator for water in the fuel.
E. Check for fuel supply lines that are restricted or not correctly installed.
G. Check that the EFLP is operating correctly.
F. Check for air in the fuel system and that the fuel system is primed.
G. Check the diesel fuel for contamination. Refer to Systems