Honda CBR125RW - Service manual > Fuel System (PGM-FI)

COMPONENT LOCATION

SERVICE INFORMATION

GENERAL

• Work in a well ventilated area. Smoking or allowing flames or sparks in the work area or where gasoline is stored can cause a fire or explosion.
• Before disconnecting the fuel feed hose, relieve fuel pressure from the system by disconnecting the quick connect fitting at the fuel pump.
• Bending or twisting the control cables will impair smooth operation and could cause the cables to stick or bind, resulting in loss of vehicle control.
• Do not apply commercially available carburetor cleaners to the inside of the throttle bore.
• Do not snap the throttle valve from full open to full close after the throttle cable has been removed. It may cause incorrect idle operation.
• Seal the intake ports with tape or a clean cloth to keep dirt and debris from entering the engine after the throttle body has been removed.
• Do not damage the throttle body. It may cause incorrect throttle valve operation.
• Prevent dirt and debris from entering the throttle bore and air passages after the throttle body has been removed. Clean them using a compressed air if necessary.
• The throttle body is factory pre-set. Do not disassemble in a way other than shown in this manual.
• Do not loosen or tighten the white painted nut and screw of the throttle body. Loosening or tightening them can cause throttle valve and idle control failure.
• The parts of the throttle body not shown in this manual should not be disassembled.
• Always replace the packing when the fuel pump is removed.
• A faulty PGM-FI system is often related to poorly connected or corroded connectors. Check those connections before proceeding.
• The PGM-FI system is equipped with the Self-Diagnostic System described. If the MIL blinks, follow the Self-Diagnostic Procedures to remedy the problem.
• When checking the PGM-FI system, always follow the steps in the troubleshooting table.
• The PGM-FI system is provided with fail-safe function to secure a minimum running capability even when there is any trouble in the system. When any abnormality is detected by the self-diagnosis function, running capability is secured by making use of the numerical values of a situation preset in advance in the simulated program map.

  It must be remembered, however, that when any abnormality is detected in injector, the fail-safe function stops the engine to protect it from damage.

• When disassembling the PGM-FI system parts, note the location of the O-rings. Replace them with new ones upon reassembly.
• Use a digital tester for PGM-FI system inspection.

SPECIFICATIONS

TORQUE VALUES

Bank angle sensor mounting screw 1.2 N-m (0.1 kgf-m, 0.9 lbf-ft)
ECT sensor 24.5 N-m (2.5 kgf-m, 18 lbf-ft)
Fuel pump setting plate nut - For tightening sequence
Injector joint mounting bolt 5.1 N-m (0.5 kgf-m, 3.8 lbf-ft)
O2 sensor 25 N-m (2.5 kgf-m, 18 lbf-ft)
Sensor unit torx screw 3.4 N-m (0.3 kgf-m, 2.5 lbf-ft)
IACV setting plate torx screw 2.1 N-m (0.2 kgf-m, 1.5 lbf-ft)
Throttle cable stay screw 3.4 N-m (0.3 kgf-m, 2.5 lbf-ft)
Insulator band screw -
Air cleaner cover screw 1.2 N-m (0.1 kgf-m, 0.9 lbf-ft)

TOOLS

• PGM-FI
• DTC Index
• DTC Troubleshooting
• MIL Troubleshooting
• Fuel
• Air Cleaner Housing
• Injector
• ECT Sensor

See also: