1A-82 Engine Control System (4HK1)
8
1. Fully clamp off a fuel hose as close to the fuel
tank as possible (this will draw vacuum on the
fuel system). You can also disconnect a fuel
line and plug it.
2. Start the engine and turn the idle up control
knob to the highest position. (Full clockwise
direction. The idle speed is increased up to
1600 RPM.)
3. Monitor the fuel pressure/ vacuum gauge.
Notice: Release the clamp or open the plug
when the gauge is likely to be more than 8
inHg during the test.
Can a vacuum of at least the specified amount
be pulled on the fuel system?
8 inHg
Go to Step 11 Go to Step 10
9
1. Inspect the fuel lines between the fuel supply
pump and fuel tank for being crushed or
kinked.
2. Inspect for a plugged fuel tank vent hose.
3. Inspect inside the fuel tank (if possible) for any
foreign material that may be getting drawn into
the fuel line pickup causing a blocked
condition.
4. Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 17 Go to Step 13
10
1. Inspect the fuel system line connections
between the fuel tank and the fuel supply
pump for tightness and all fuel hoses for cuts,
cracks and for the use of proper clamps.
2. Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 17 Go to Step 11
11
1. Turn OFF the ignition.
2. Disconnect the FRP regulator harness
connector.
3. Inspect for an intermittent, for poor
connections and corrosion at the harness
connector of the FRP regulator (pins 1 and 2
of E-17).
4. Disconnect the ECM harness connector.
5. Inspect for an intermittent, for poor
connections and corrosion at the harness
connector of the ECM (pins 89, 97, 105 and
113 of E-12).
6. Test for high resistance on each circuit.
7. Repair the connection(s) or circuit(s) as
necessary.
Did you find and correct the condition?
—
Go to Step 17 Go to Step 16
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 82 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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