TOHATSU BFT75A Service Manual page 241

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FUEL SYSTEM
CIRCUIT INSPECTION
FUSE
(10 A)
T3 T4
5
T1
1 2
1
42
BATTERY
T2
5
GND2
1 2
1. Fuse inspection
Turn the combination switch OFF.
Check for blown No.1 fuse.
Is the fuse normal?
YES
NO
2. Fuel pump power/ground line open circuit
inspection
Turn the combination switch OFF and disconnect
the fuel pump (High pressure side) 2P connector
Turn the combination switch ON.
Measure the battery voltage between the fuel pump
(High pressure side) 2P connector
harness side No.1 (Blue/Red) terminal and No.2
(Black) terminal.
Is there battery voltage for a few seconds?
YES
NO
5-100
FUSE FUSE
(30 A) (10 A)
REMOTE CONTROL TYPE:
C52
6
W/Bl
BAT
41
LOAD
Bl/Y
C47
COMBINATION SWITCH
Bl/Y
W/Bl
TILLER HANDLE TYPE:
C56
W/Bl
BAT
LOAD
Bl/Y
C50
COMBINATION SWITCH
Bl/Y
W/Bl
– GO TO STEP 2.
– Replace the blown fuse and check for a
short in the main wire harness or incorrect
load by referring to the fuse load chart
(page 4-13).
.
– Replace the fuel pump (High pressure
side) with a new one and recheck.
– GO TO STEP 3.
PGM-FI/MAIN RELAY
FUEL PUMP
4 5 1 2 4 1 3 3
13
7 6
GND6
JOINT CONNECTOR 1 JOINT CONNECTOR 2
FUEL PUMP (HIGH PRESSURE SIDE)
2P CONNECTOR
MAIN WIRE HARNESS SIDE
main wire
FUEL PUMP
(Blue/Red)
ECM
1 2 5
FLR1
FLR2
29
12
2 1
GND4
Bl BLACK Br BROWN
Y YELLOW O ORANGE
Bu BLUE Lb LIGHT BLUE
G GREEN Lg LIGHT GREEN
R RED P PINK
W WHITE Gr GRAY
GND1
(Black)