GDI -
On-vehicle Service
13I-121
ON-VEHICLE SERVICE
Caution
(1) Never attempt to tamper the fixed SAS. The fixed SAS
is precisely adjusted at factory.
(2) Should it be tampered, the full closed position of the
throttle valve will be changed. This causes the
engine-ECU to learn a wrong position of the throttle
valve.
FUEL PUMP CONNECTOR DISCONNECTION
(HOW TO REDUCE FUEL PRESSURE)
When removing the fuel pipe, hose, etc., since fuel pressure
in the fuel pipe line is high, do the following operation so
as to release fuel pressure in the line and prevent fuel from
running out.
1. Remove the fuel filler cap to release pressure in the fuel
tank.
2. Remove the fuel pump relay.
3. Connect the MUT-
II
to the diagnosis connector.
Caution
Turn off the ignition switch before disconnecting or
connecting the MUT-
II
.
4. Turn off the ignition switch.
5. Select “Item No. 74” from the MUT-
II
Data list.
6. Crank the engine for at least two seconds.
7. If the engine is not be started, use the MUT-
II
to make
sure that the fuel pressure is 0.5 MPa or less. Then turn
off the ignition switch.
8. If the engine is started, release fuel pressure by the
following procedure:
(1) Turn off the ignition switch, and then stop the engine.
(2) Disconnect one of the ignition coil connectors.
(3) Crank the engine for at least two seconds.
(4) If the engine is not be started, use the MUT-
II
to
make sure that the fuel pressure is 0.5 MPa or less.
Then turn off the ignition switch.
(5) If the engine is started, stop it by racing and use
the MUT-
II
to make sure that the fuel pressure is
0.5 MPa or less. Then turn off the ignition switch.
(6) Reconnect the ignition coil connector.
Caution
Clean the spark plug which corresponds to the
disconnected ignition coil connector.
9. Remove the MUT-
II
.
10. Install the fuel pump relay.
FUEL PUMP OPERATION CHECK
This procedure is the same as for the 4G6-MPI engine.
Fixed SAS
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