5-115
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FUEL SYSTEM
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 – GO TO STEP 4.
NO – Replace the fuel pump relay or main relay
with a new one and recheck.
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 – GO TO STEP 5.
NO – Replace the fuse/relay junction box with a
new one and recheck.
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 main wire harness side
No.13 (Light green) terminal and engine ground
– ECM connector A main wire harness side
No.14 (Light green) terminal and engine ground
Is battery voltage present?
YES – • 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.
NO – Repair the open or short in the Light green
wire.
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.
ECM CONNECTOR A
MAIN WIRE HARNESS SIDE
FLR 1
(Light green)
FLR 2
(Light green)
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