14. K-XCT 125 i FUEL SYSTEM (Auto Control Fuel Injection System)
14-3
SERVICE INFORMATION
GENERAL INSTRUCTIONS
Disconnect the cables of the battery when the engine is running, which could lead to ECU
damage.
Connect the harness positive (+) cable to the battery negative (-) terminal or connect the harness
negative (-) to the battery positive (+) terminal, which could lead to ECU damage.
Always keep fuel over 750 cc in fuel tank.
SPECIFICATIONS
Item
Standard
Charging voltage of battery 13.5~14.5V
Voltage from the ECU to sensor 5±0.1V
Fuel injector resistance (20°C/68°F) 10.6~15.9Ω
Water temperature sensor resistance
2.075±10 KΩ (20~30°C)
Throttle position sensor voltage
Idle (0°)=0.23±0.05V
Throttle fully (90° /3.27V over)
Fuel pump resistance (20°C/68°F) F: about 1100Ω E: about 100Ω
O2 sensor
O2 sensor heater resistance
6.7~9.5Ω
Voltage
Air/Fuel<14.7 (Rich) >0.7V
Air/Fuel>14.7 (Lean) <0.18V
Item
Standard
Crank position sensor (Pulser) resistance
(20°C/68°F)
95~144Ω
Inductive ignition coil resistance (20°C/68°F) 0.55~0.75Ω
Roll sensor voltage (diagnostics)
Normal: 0.3~1.4V
Over 65° fall down: 3.5~4.7V
Idle speed 1800±100 rpm
Gasoline is very dangerous. When working with gasoline, keep sparks and flames away
from the working area.
Gasoline is extremely flammable and is explosive under certain conditions. Be sure to
work in a well-ventilated area.
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