Honda HR-V: Fuel Supply System Description - Fuel Pump
The fuel tank unit consists of the following components.
2WD
AWD
FUEL SUPPLY SYSTEM DESCRIPTION - JET PUMP (AWD)
Operation
The return fuel entering the jet pump from the fuel pressure regulator passes
through the orifice in the jet pump
to increase the flow speed, which generates increased suction pressure. This
pressure (vacuum pressure) is used
to transport the fuel on the sub fuel tank unit side through the transfer tube
to the main side. A safety valve
(relief valve) is installed for protection of the fuel line in case of an
abnormal fuel pressure rise, caused by a
clogged orifice etc.
FUEL SUPPLY SYSTEM DESCRIPTION - RETURNLESS FUEL SYSTEM
The fuel returnless system incorporates the fuel pressure regulator into the
fuel pump to remove the fuel return
pipe and other parts. The fuel pressure regulator keeps the fuel pressure
constant in the fuel pump to return the
fuel into the fuel tank directly. This does not need the fuel line in the engine
compartment to prevent the fuel
temperature from increasing and to reduce the fuel evaporation of gas in the
fuel tank.
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The control system for improved fuel economy in actual traffic aims at
disseminating eco-driving. It consists of
an effective control system, ambient illumination and instantaneous fuel
consumption
Air-fuel ratio control is part of fuel injection control and comprises the
steps of:
Calculating basic injection amount from intake airflow amount and engine
speed
Calculating air-fuel ratio cor
FUEL AND EMISSIONS SYSTEMS DTC TROUBLESHOOTING INDEX (KA/KC)
DTC Troubleshooting Index
NOTE: The above DTCs are indicated when the PGM-FI system is selected with
the HDS.Some automatic
transmissio
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NOTE: Before you troubleshoot, review the general troubleshooting
information.
1. Problem verification:
Turn the vehicle to the ON mode.
Clear the DTC with the HDS.
Turn the vehicle to the OFF (LOCK) mode.
Turn the vehicle to the ON mode, then wait for at least 10 seconds or
more.
Turn the
COMMUNICATION SYSTEMS DESCRIPTION (F-CAN) - OVERVIEW
F-CAN (High-speed CAN)
The network between the powertrain and control units for chassis system is
called F-CAN and it employs high
speed CAN with communication rate at 500 kbps.
Typical CAN Bus Communication Operation
The F-CAN detects the diffe