Vapor Separator Inspection - TOHATSU BFT250A Service Manual

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3. Fuel pump relay, main relay Inspection
Turn the combination switch OFF.
Inspect the fuel pump relay (page 10-11).
Inspect the main relay (page 10-11).
Is the fuel pump relay normal?
YES
NO
4. Fuse/relay junction box inspection
Turn the combination switch OFF.
Inspect the fuel pump relay circuit in the fuse/relay
junction box (page 10-13).
Is the fuse/relay junction box normal?
YES
NO
5. Fuel pump relay line Inspection
Install the fuel pump relay and fuse/relay junction
box.
Disconnect the ECM connector A
Turn the combination switch ON.
Measure the voltage as follows:
– ECM connector A
– ECM connector A
Is battery voltage present?
YES
NO

VAPOR SEPARATOR INSPECTION

FLOAT VALVE
If gasoline overflows from the vapor separator, perform
the following check.
Disassemble the vapor separator (page 5-109).
Remove the float valve [1] from the float.
Check the float valve tip and the valve seat [2] for wear
and damage as shown. Replace the float valve or the
vapor separator cover if necessary.
– GO TO STEP 4.
– Replace the fuel pump relay or main relay
with a new one and recheck.
– GO TO STEP 5.
– Replace the fuse/relay junction box with a
new one and recheck.
main wire harness side
No.13 (Light green) terminal and engine ground
main wire harness side
No.14 (Light green) terminal and engine ground
– • Repair the open in the Black and Blue
wire harnesses between the fuse/relay
junction box and fuel pump (High
pressure side).
• If wire harness is normal, replace the
ECM with a new one and recheck.
– Repair the open or short in the Light green
wire.
ECM CONNECTOR A
.
MAIN WIRE HARNESS SIDE
FLR 2
(Light green)
[2]
FUEL SYSTEM
FLR 1
(Light green)
[1]
OK REPLACE
5-115