Fuel Injectors

Injector Signal Test

• Prepare two test light sets with male terminals as shown. Rating of Bulb [A]: 12 V x 3 ~ 3.4 W Terminal Width [B]: 1.8 mm (0.071 in.) Terminal Thickness [C]: 0.8 mm (0.031 in.)

_CAUTION_

Do not use larger terminals than specified above. A larger terminal could damage the injector main harness connector (female), leading to harness repair or replacement.

Be sure to connect bulbs in series. The bulb works as a current limiter to protect the solenoid in the injector from excessive current.

• Remove connectors for injector [A].

• Connect each test light set [B] to the injector subharness connector [C].

• Turn the ignition switch ON.

• While cranking the engine with the starter motor, watch the test lights.

• If the test lights flicker at regular intervals, the injector circuit in the ECU, and the wiring are good. Perform the "Injector Resistance Inspection".

OInjector signals can be also confirmed by connecting the hand tester (x 10 V AC) instead of the test light set to the injector main harness (female) connector. Crank the engine with the starter motor, and check to see if the hand oscillates at regular intervals. Special Tool - Hand Tester: 57001-1394

• If the test light doesn't flicker (or the tester needle doesn't oscillates), check the wiring and connectors again. If the wiring is good, check the injector voltage. If the wiring is good, inspect the ECU for its ground and power supply (see ECU section).

Injector Resistance Inspection

• Remove the fuel tank (see Fuel Tank Removal).

• Disconnect the connector from the injector [A] (see Throttle Body Assy Disassembly/Assembly).

• Measure the injector resistance with the hand tester [B].

Special Tool - Hand Tester: 57001-1394

Injector Resistance Connections to Injector

Meter (+)

Meter (-)

#1:

W/R <—»

BL/R Terminal

#2:

W/R <—»

BL/G Terminal

#3:

W/R <—»

BL/BK Terminal

#4:

W/R <—»

BL/Y Terminal

★ If the reading is out of the range, perform the "Injector Unit Test".

★ If the reading is normal, perform the "Injector Unit Test" for confirmation.

Injector Unit Test

★ Use two leads [A] and the same test light set [B] as in "Injector Signal Test".

Rating of Bulb [C]: 12 V x (3 ~ 3.4) W 12 V Battery [D]

CAUTION ~

Be sure to connect the bulb in series. The bulb works as a current limiter to protect the solenoid in the injector from excessive current.

GC1 70244S1 C

• Connect the test light set to the injector [E] as shown.

• Open and connect [F] the end of the lead to the battery (-) terminal repeatedly. The injector should click.

• If the injector does not click, replace the injector.

• If the injector clicks, check the wiring again. If the wiring is good, replace the injector (may be clogged) or ECU.

Injector Fuel Line Inspection

• While pinching the fuel pump outlet hose joint locks [C] with fingers, pull the joint out along the delivery pipe (see Fuel Tank Removal).

Pump Outlet Hose Joint [B]

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