Fuel Injector Inspection - TOHATSU BFT250A Service Manual

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FUEL SYSTEM
FLOAT HEIGHT
The float valve and the float must be installed on the
cover properly.
Place the cover as shown and measure the distance
between the float and cover (i.e. float height) at the tip
of the float.
TOOL:
Float level gauge [1]
Float height: 28.5 – 33.5 mm (1.12 – 1.32 in)
If the float height is outside the specification, adjust the
float height by bending the brass float tab slowly with
care not to damage the float.
Check float operation.

FUEL INJECTOR INSPECTION

CIRCUIT INSPECTION
ECM
INJ1
Br
INJ2
R
INJ3
Bu
INJ4
Y
INJ5
Y/R
INJ6
Y/Bu
13
1. Fuel injector power line open circuit inspection
Turn the combination switch OFF and disconnect
the injector 2P connectors
Turn the combination switch ON.
Measure the battery voltage between each fuel
injector 2P connector main wire harness side No.2
(Yellow/Black) terminal and ground.
Does battery voltage exist?
YES
NO
5-116
07401-0010000
No.9 FUSE
FUSE/RELAY
(15A)
JUNCTION BOX
8 17
Y/Bl
Y/Bl Br
31 32
1 2 1
FUEL FUEL
INJECTOR 1 INJECTOR 2
, and .
– GO TO STEP 2.
– • Repair the open circuit in wire between
the No.9 fuse and fuel injector.
• If the main harness wire is normal,
inspect the No.9 fuse circuit in the fuse
/relay junction box (page 10-13).
Measure the float height
at the tip of the float.
18 20
Y/Bl Y/Bl Y/Bl
Y/Bl R Y/Bl Bu Y/Bl Y
33 34 35
2 1 2 1 2
FUEL FUEL
INJECTOR 3 INJECTOR 4
, , ,
[1]
22 2
Y/Bl Y/Bl
Y/Bl Y/R Y/Bl Y/Bu
Bl Black
Y Yellow
Bu Blue
36
1 2 1 2
G Green
R Red
W White
FUEL FEUL
INJECTOR 5 INJECTOR 6
FUEL INJECTOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
IGP 2
(Yellow/Black)
Br Brown
O Orange
Lb Light blue
Lg Light green
P Pink
Gr Gray