Fuel Injector (Service Code 41)
Fuel Injector Resistance Inspection
Fuel Tank (see Fuel Tank Removal)
Fuel Hose (see Fuel Hose Replacement in the Periodic
Fuel Injector Connector [A]
Connect a digital meter [A] to the injector terminals.
Measure the fuel injector resistance.
Fuel Injector Resistance
R/W terminal ←→ BL/R terminal
About 11.7 ∼ 12.3 Ω at 20°C (68°F)
If the reading is out of the standard, replace the injector.
If the reading is within the standard, check the power sup-
ply voltage (see Fuel Injector Power Supply Voltage In-
Fuel Injector Power Supply Voltage Inspection
Be sure the battery is fully charged.
Disconnect the injector connector and connect the mea-
suring adapter [A] between these connectors.
Main Harness [B]
Fuel Injector [C]
Special Tool - Measuring Adapter: 57001-1700
Connect a digital meter [D] to the measuring adapter lead.
Fuel Injector Power Supply Voltage
Connect the Adapter:
Digital Meter (+) → R (injector R/W) lead
Digital Meter (–) → Battery (–) Terminal
Refer to the Self-diagnosis Procedures, connect the 12 V
battery to the main harness.
Measure the power supply voltage with the engine
Power Supply Voltage
If the voltage is out of the standard, check the power sup-
ply wiring (see Fuel Injector Circuit).
If the reading is within the standard, check the output volt-
age (see Fuel Injector Output Voltage Inspection).
FUEL SYSTEM (DFI) 3-57