Subaru 2009 IMPREZA Service Manual page 1273

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ENGINE (DIAGNOSTICS)

5. DRIVE CYCLE D

DRIFT DIAGNOSIS

1) Make sure that the engine coolant temperature at engine starting is less than 30°C (86°F).

2) Make sure that fuel remains 10 2 (2.6 US gal, 2.2 Imp gal) or more and the battery voltage is 10.9 V or

3) Start the engine, and check that the engine coolant temperature increases by 10°C (18°F) or more, and

reaches 75°C (167°F) or more, when the engine is warmed up.

4) Idle the engine for 120 seconds or more in the condition of step 3).

STUCK DIAGNOSIS

1) Make sure that the battery voltage is 10.9 V or more.

2) Perform the Clear Memory Mode. <Ref. to EN(H4DOTC)(diag)-54, Clear Memory Mode.>

3) Drive for approximately 50 2 (13.2 US gal, 11 Imp gal) of fuel.

• It is acceptable to drive the vehicle intermittently.

• Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the bat-

tery terminals.)

Fuel Temperature Sensor "A" Circuit Range/Performance

6. DRIVE CYCLE E

1) Make sure that the battery voltage is 10.9 V or more.

2) Perform the Clear Memory Mode. <Ref. to EN(H4DOTC)(diag)-54, Clear Memory Mode.>

3) Drive for approximately 30 2 (7.9 US gal, 6.6 Imp gal) of fuel.

• It is acceptable to drive the vehicle intermittently.

• Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the bat-

tery terminals.)

Fuel Level Sensor "A" Circuit Range/Performance

7. DRIVE CYCLE F

1) Make sure that the engine coolant temperature at engine starting is less than 30°C (86°F).

2) Start the engine, and warm it up until engine coolant temperature increases over 95°C (203°F).

3) Idle the engine for 10 minutes or more in the condition of step 2.

Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the battery

Intake Air Temperature Sensor 1 Circuit Range/Performance

EN(H4DOTC)(diag)-52