31630-ZV5-013 Honda SEE PART DETAILS - PRI; COIL ASSY., CHARGE (12V-6A) (Honda Code 7160971).

Table 1
Diagnostic Codes Table    
CDL Code and Description    Conditions which Generate this Code    System Response    
18-8 Fuel Control Valve : Abnormal Frequency, Pulse Width, or Period     The controller for the primary fuel control valve has detected an error at the input for the Pulse Width Modulated signal (PWM). The problem is communicated to the Electronic Control Module (ECM) via the CAN data link.     Control for the primary fuel control valve reverts to the CAN data link.    
18-9 Fuel Control Valve : Abnormal Update Rate     The engine ECM did not receive the expected data link information from the controller for the primary fuel control valve.     Control for the primary fuel control valve reverts to the PWM signal.    
3414-8 Fuel Control Valve #2 : Abnormal Frequency, Pulse Width, or Period     The controller for the secondary fuel control valve has detected an error at the input for the PWM signal. The problem is communicated to the ECM via the CAN data link.     Control for the secondary fuel control valve reverts to the CAN data link.    
3414-9 Fuel Control Valve #2 : Abnormal Update Rate     The engine ECM did not receive the expected data link information from the controller for the secondary fuel control valve.     Control for the secondary fuel control valve reverts to the PWM signal.    This engine is equipped with a high pressure common rail fuel system. The fuel pressure for the high pressure common rail fuel system is generated by the high-pressure fuel pump. Output pressure regulation for the high-pressure fuel pump is provided by the fuel control valve. The fuel control valve is a mechanical valve that is part of the high-pressure fuel pump. The valve regulates the fuel pressure that is produced by the pump by controlling the volume of fuel that enters the pump. The valve is controlled by an electrical actuator. Control for the actuator is provided by an electronic controller that is part of the actuator.The engine ECM communicates a desired throttle position to the controller for the fuel control in the form of a PWM signal. The PWM signal is generated by a signal driver at the ECM and the signal is sent to the controller for the fuel control valve.Note: The desired throttle position is also communicated via the CAN data link as a throttle backup control.The PWM signal that is used for the desired throttle position has a constant frequency of 500 Hz. At low engine idle, the signal will have a duty cycle of approximately 10 percent. At high engine idle with no load on the engine, the signal will have a duty cycle of approximately 20 to 25 percent. At high engine idle with a full load on the engine, the signal will have a duty cycle of approximately 50 to 60 percent.The desired throttle position can be viewed on Caterpillar Electronic Technician (ET). View the status of the "Fuel Actuator Position Command" parameter in order to determine the desired throttle position of the engine. At low engine idle, the "Fuel Actuator Position Command" will be approximately 10 to 15 percent. At high engine idle with no load on the engine, the "Fuel Actuator Position Command" will be approximately 20 to 25 percent. At high engine idle with a full load on the engine, the "Fuel Actuator Position Command" will be approximately 40 to 50 percent.A power module is used to supply electrical power to the controller for the fuel control valve. The power module is used to convert battery voltage (24 VDC) to 14.0 1.5 VDC that is used by the controller. The suppression module is circuit protected by the ECM circuit breaker located in the low current power distribution panel.
Illustration 1 g02574400
Schematic of the PWM signal (primary throttle control) for the high-pressure fuel pump
Illustration 2 g02576378
Schematic of the PWM signal (secondary throttle control) for the high-pressure fuel pumpNote: For a schematic and troubleshooting information that is related to the throttle backup control and the CAN data link, refer to Troubleshooting, "Data Link - Test".
Illustration 3 g02576597
Location of the connectors at the control box that are for the fuel control (typical top front engine view) (1) Right rail connector (2) Secondary fuel harness (3) Control assembly input connector (secondary ECM) (4) Power module for the secondary fuel control valve (5) Control assembly output connector (6) Control assembly input connector (primary ECM) (7) Relay for the secondary keyswitch circuit (8) Relay for the primary keyswitch circuit (9) Power module for the primary fuel control valve (10) Primary power harness (11) J1/P1 connector (primary ECM) (12) J1/P1 connector (primary ECM) (13) Secondary power harness
Illustration 4 g02576818
Location of the low current power distribution panel (front left side engine view) (14) Primary power harness (15) Secondary power harness (16) Low current power distribution panel (17) High current power distribution panel
Illustration 5 g02577199
Location of the connections and circuit breakers at low current power distribution panel (16) for the fuel control (18) Hard stop relay (primary) (19) Hard stop relay (secondary) (20) Primary ECM breaker (21) Secondary ECM breaker (22) Secondary keyswitch breaker (23) Primary keyswitch breaker (24) Secondary terminal strip (25) Primary terminal strip
Illustration 6 g02578240
Location of the connectors at the high-pressure fuel pump (left side high-pressure fuel pump view) (26) Connector for the controller at the fuel control valve (primary)