This Subaru DIY repair manual by Haynes, covers:
- Subaru Legacy, 2000-2009
- Subaru Legacy Outback, 2000-2009
- Subaru Legacy Baja, 2000-2009
- Subaru Forester, 2000-2008
Legacy and Outback models are available in 4-door sedan and wagon styles. Forester models are available in 4-door SUV body styles, and Baja models come in a 4-door sedan or pickup body.
Engines available are either a 2.5L SOHC or a 2.5L DOHC turbocharged motor, coupled to 5- or 6-speed manual, or 4- or 5-speed automatic transaxle.
Note: This manual does not cover 6-cylinder or diesel engines.
EMISSIONS AND ENGINE CONTROL SYSTEMS
TUMBLE GENERATOR | DESCRIPTION AND COMPONENT REPLACEMENT
- The tumble generator system is used on 2004 and 2005 ULEV models and on some 2005 and 2006 non-ULVE, non-turbocharged models and on 2004 through 2006 turbocharged models. The tumble generator valves reduce emissions during start-ups. A tumble generator swirls the air entering the combustion chamber.
Swirl is the orderly rotation of the air/fuel mixture in the combustion chamber, which improves the dispersion (mixing) of the air/fuel mixture. There are two types of tumble generator valve systems used on the vehicles covered in this manual. The principal differences between the two systems is the location of the tumble generator valves.
- On 2004 and 2005 ULEV models and on some 2005 and 2006 non-ULEV, non-turbocharged models, the system consists of four butterfly valves housed in the intake manifold plenum.
In this system, each pair of valves is fitted on a single shaft and controls the airflow through the intake runners for one cylinder head. One pair of valves controls the intake runners for cylinder nos. 1 and 3 and another pair of valves control the runners for cylinder nos. 2 and 4.
On these models, the tumble generator valve actuator is located at the right rear corner of the intake manifold plenum.
- On 2004 through 2006 turbocharged models, the tumble generator valves (butterfly valves) are housed in the lower intake manifolds (Subaru refers to the lower intake manifolds as tumble generator housings). There is one valve for each intake runner, and each pair of valves is fitted to a common shaft. There are two actuators.
HILL-HOLDER SYSTEM | ADJUSTMENT
NOTE: The hill-holder system is a feature on 2003 and later Forester models with manual transmissions.
(Refer to illustrations 14.3a and 14.3b.)
- The hill-holder system uses the vehicle braking system to work. It consists of a valve assembly that is hydraulically linked to the brake master cylinder and a cable that is mechanically linked to the clutch pedal.
- Find a hill with at least three degrees of incline (the system will not engage with less than 3° of incline).
- Drive the vehicle up the hill and then stop. With the clutch pedal depressed, take your foot off the brake. If the vehicle starts to roll backward, the cable is too loose and needs adjusting. Loosen the locknut for the cable adjusting nut (near the valve assembly) and tighten the cable adjusting nut a small amount (see illustrations).
NOTE: When turning the adjusting nut, make sure that the cable does not move or twist.
- Repeat the test and note whether the vehicle remains in place or rolls backward. If it still rolls, tighten the adjusting nut a little more.
- Follow this procedure until the hill-holder system holds the vehicle in position on the hill. CAUTION! Be careful not to tighten the cable any more than necessary. Over-tightening will keep the brakes engaged and prevent the vehicle from rolling freely when the clutch pedal is released.
- To confirm that the cable is not adjusted too tightly, place the vehicle in neutral and release the clutch pedal while on the hill. Briefly remove your foot from the brake pedal to see how the vehicle responds. The vehicle should roll freely. If it does not, the cable may be adjusted too tightly.
- Repeat the adjustment procedure until the hill-holder system operates properly. Once the adjustment is made, tighten the locknut securely making sure not to change the position of the adjusting nut.
Subject: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Subaru Legacy, Legacy Outback, Legacy Baja, and Forester service, maintenance, repair. | ISBN-10: 1620920042 | ISBN-13: 9781620920046 | Haynes 89101