Subaru 2009 IMPREZA Service Manual page 1080

MECHANICAL
4. Ignition Timing
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself at measurement.
1. METHOD WITH SUBARU SELECT MONITOR
1) Before checking the ignition timing, check the
following item:
(1) Check the air cleaner element is free from
clogging, spark plugs are in good condition, and
hoses are connected properly.
(2) Check the malfunction indicator light does
not illuminate.
2) Warm up the engine.
3) Read the ignition timing using Subaru Select
Monitor. <Ref. to EN(H4DOTC)(diag)-35, READ
CURRENT DATA FOR
MODE), OPERATION, Subaru Select Monitor.>?
Ignition timing [BTDC/rpm]:
17° 10°/700 (AT model)
12° 10°/700 (MT model)
If the timing is not correct, check the ignition control
system. Refer to "Engine Control System". <Ref. to
EN(H4DOTC)(diag)-2, Basic Diagnostic Proce-
dure.>
2. METHOD WITH TIMING LIGHT
1) Before checking the ignition timing, check the
following item:
(1) Check the air cleaner element is free from
clogging, spark plugs are in good condition, and
hoses are connected properly.
(2) Check the malfunction indicator light does
not illuminate.
2) Warm up the engine.
3) Stop the engine, and turn the ignition switch to
OFF.
4) Disconnect the ground cable from battery.
Ignition Timing
ENGINE (NORMAL
IN-00203
ME(H4DOTC)-22
5) Remove the air
IN(H4DOTC)-11, REMOVAL, Air Intake Duct.>
6) Disconnect the connector from mass air flow and
intake air temperature sensor.
7) Remove the air cleaner case and element.
8) Connect the timing light to the power wire of #1
ignition coil.
9) Install the connectors of air cleaner case, ele-
ment, and the mass air flow and intake air temper-
ature sensor.
10) Connect the ground cable to battery.
11) Start the engine, turn the timing light to the
crank pulley, and check the ignition timing by
means of crank pulley indicator.
Ignition timing [BTDC/rpm]:
17° 10°/700 (AT model)
12° 10°/700 (MT model)
If the timing is not correct, check the ignition control
system. Refer to "Engine Control System". <Ref. to
EN(H4DOTC)(diag)-2, Basic Diagnostic Proce-
dure.>
intake duct. <Ref.
IN-00203
to