6-1
Fuel system basic procedure
Fuel system basic procedure
Starting the engine after running out
of fuel
Use the following procedure to start the en-
gine after running out of fuel.
1. Check:
•Fuel supply
Fuel is not supplied → Check and repair
the fuel system.
2. Start the engine and let it idle for 5 min-
utes.
• After the engine stops due to a lack of fuel, it
cannot be cranked for 7 seconds.
• To start the engine, it may be necessary to
crank the engine 10 or more times.
• The engine idle speed may be unstable after
the engine is started until the air is bled from
the high-pressure line, but this is not a mal-
function.
Reducing the fuel pressure
Before servicing the high-pressure fuel line
or vapor separator, make sure to reduce
the fuel pressure in the fuel line. Otherwise,
pressurized fuel could spray out.
1. Connect the YDIS to display “DI fuel pres-
sure P”, “DI fuel pressure S”, and “VST
fuel pressure”.
2. Remove:
• Fuse cover
• Fuse (30 A) (high-pressure fuel pump sys-
tem) “1”
3. Start the engine.
Wait until the engine stalls.
4. After the engine stalls, crank the engine 2
or 3 times.
5. Reduce the fuel rail fuel pressure using the
YDIS “Stationary test” or “Reduce DI fuel
pressure”. See the YDIS (Ver. 2.49 or later)
instruction manual.
When using “Stationary test”, activate the in-
jector for 1 cylinder on each side of the engine.
6. Check:
•Fuel pressure
Does not decrease → Repeat steps 4 and
5.
7. Install:
• Fuse (30 A) (high-pressure fuel pump sys-
tem)
• Fuse cover
Disconnecting the quick connector
Before disconnecting the quick connector,
reduce the fuel pressure. Otherwise, pres-
surized fuel could spray out.
1. Reduce the fuel pressure. See “Reducing
the fuel pressure” (6-1).
2. Disconnect:
• Quick connector
a. Wrap a rag around the quick connector
“1”.
b. Spread apart the ends of the retainer
“a”, and then pull the retainer.
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