TOHATSU BFT75A - Page 245

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FUEL SYSTEM
CIRCUIT INSPECTION
1. Fuel injector power line open circuit inspection
Turn the combination switch OFF and disconnect
the fuel injector 2P connectors , , ,
and .
Turn the combination switch ON.
Measure the battery voltage between each fuel
injector 2P connector main wire harness side No.1
(Yellow/Black) terminal and ground.
Is battery voltage present?
YES – GO TO STEP 2.
NO – • Repair the open in the wire harness
between the No.5 fuse and fuel injector.
• Faulty joint connector 1
2. Fuel injector signal line open or short circuit
Inspection
Turn the combination switch OFF.
Disconnect the ECM connector B .
Check for open or short circuit between each fuel
injector 2P connector main wire harness side No.2
terminal and ECM connector B main wire
harness side terminal.
Is circuit normal?
YES – Circuit is normal.
NO – Repair the open or short circuit wire
between the fuel injector and ECM.
Y
Bu
R
Br
37 36 35 34
No.5
FUSE
2418192021
INJ2
INJ1
INJ3
INJ4
16 15 14 13
12 212121
28
ECM
JOINT CONNECTOR 1
13
FUEL
INJECTOR 4
FUEL
INJECTOR 3
FUEL
INJECTOR 2
FUEL
INJECTOR 1
(15 A)
Y/Bl Y/Bl Y/Bl Y/Bl
Y
BLACK
YELLOW
BLUE
GREEN
RED
WHITE
BROWN
ORANGE
LIGHT BLUE
LIGHT GREEN
PINK
GRAY
Bl
Y
Bu
G
R
W
Br
O
Lb
Lg
P
Gr
FUEL INJECTOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
IGP 2
(Yellow/Black)