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FUEL SYSTEM (DFI) 3-119
Fuel Injectors
If the reading is normal, remove the fuel tank (see Fuel
Tank Removal), and check the power source voltage at
the injector connector [B], with a digital meter [A].
•
Measure the power source voltage with the engine
stopped, and the connector joined, with a digital meter
and needle adapter set [C].
Special Tool - Needle Adapter Set: 57001-1457
Injector Power Source Voltage at Injector
Connections to Injector #1, #2, #3, #4
Meter (+) → W/R lead [E]
Meter (–) → Battery (–) Terminal [D]
•
Turn the ignition switch ON.
Power Source Voltage at Injector Connector
Standard: Battery Voltage for 4 seconds, and then 0 V
•
Turn the ignition switch OFF.
If the reading is out of the standard, check the wiring (see
wiring diagram in this section).
If the reading is good, and the power source voltage is
normal, check the output voltage.
Output Voltage Inspection
•
Measure the output voltage at the ECU connector in the
same way as power source voltage inspection. Note the
following.
Digital Meter [A]
Connector [B]
Special Tool - Needle Adapter Set: 57001-1457
Injector Output Voltage at ECU
Connections for Injector #1
Meter (+) → BL/R lead (terminal 46)
Meter (–) → Battery (–) Terminal
Connections for Injector #2
Meter (+) → BL/G lead (terminal 59)
Meter (–) → Battery (–) Terminal
Connections for Injector #3
Meter (+) → BL/BK lead (terminal 44)
Meter (–) → Battery (–) Terminal
Connections for Injector #4
Meter (+) → BL/Y lead (terminal 57)
Meter (–) → Battery (–) Terminal
•
Turn the ignition switch ON.
Output Voltage at ECU
Standard: Battery Voltage for 4 seconds, and then 0 V
If the output voltage is normal, check the ECU for its
ground, and power supply (see ECU Power Supply In-
spection).
If the ground and power supply are good, replace the ECU
(see ECU section).
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