3-122 FUEL SYSTEM (DFI)
If the reading is out of the specification, remove the ECU
and check the wiring for continuity between main harness
Disconnect the ECU and injector connector.
ECU Connector [A] ←→ Fuel Injector Connector [B]
For Fuel Injector #1 [C]
BL/R lead (ECU terminal 44) [D]
For Fuel Injector #2
BL/G lead (ECU terminal 43)
For Fuel Injector #3
BL/BK lead (ECU terminal 57)
For Fuel Injector #4
BL/Y lead (ECU terminal 56)
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation).
Fuel Injector Fuel Line Inspection
Fuel Tank (see Fuel Tank Removal)
Fuel Outlet Hose (see Fuel Hose Replacement in the
Periodic Maintenance chapter)
Be sure to place a piece of cloth around the fuel outlet
pipe of the fuel pump and the delivery pipe of the throttle
Be prepared for fuel spillage; any spilled fuel must
be completely wiped up immediately.
When the fuel hose is disconnected, fuel spills out
from the hose and the pipe because of residual
pressure. Cover the hose connection with a piece
of clean cloth to prevent fuel spillage.
Check the injector fuel line for leakage as follows.
Connect a commercially available vacuum/pressure
pump [A] to the nipple of the delivery pipe [B] with the
fuel hose [C] (both ends with the clamps [D]) as shown
in the figure.
Upside View [E]
Apply soap and water solution to the areas [F] as shown
in the figure.
Watching the pressure gauge, squeeze the pump lever
[G], and build up the pressure until the pressure reaches
the maximum pressure.
Injector Fuel Line Maximum Pressure
During pressure testing, do not exceed the maxi-
mum pressure for which the system is designed.
300 kPa (3.06 kgf/cm², 43 psi)
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