Power Steering System (Except Wrx): Other Subaru XV GP

CAUTION

1. Wear appropriate work clothing, including a helmet, protective goggles and protective shoes when performing any work.
2. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly and replacement.
3. Vehicle components are extremely hot after driving. Be wary of receiving burns from heated parts.
4. Use grease and oil of Subaru genuine or the equivalent products. Do not mix them of different grades or manufacturers.
5. Be sure to tighten fasteners including bolts and nuts to the specified torque.
6. Place shop jacks or rigid racks at the specified points.
7. Before securing a part on a vise, place cushioning material such as wooden blocks, aluminum plate or cloth between the part and the vise.

GENERAL TOOL

NOTE

For procedure of each component in the power steering system, refer to the respective article.

1. Steering wheel: < Refer to «STEERING WHEEL»(ref-560370-S40549610312013061300000) . >
2. Universal joint assembly: < Refer to «UNIVERSAL JOINT»(ref-560370-S02392576662013061300000) . >
3. Steering column: < Refer to «STEERING COLUMN»(ref-560370-S28947478472013061300000) . >
4. Electric power steering gearbox: < Refer to «ELECTRIC POWER STEERING GEARBOX»(ref-560370-S42415360112013061300000) . >
5. Power steering control module: < Refer to «POWER STEERING CONTROL MODULE»(ref-560370-S20172476912013061300000) . >

Scheme 54

Scheme 55

Scheme 56

1. Disconnect the negative terminal from the battery, and wait for 60 seconds or more.
2. Set the tire to the straight-ahead position.
3. Remove the driver's airbag module. CAUTION: Before performing service on the airbag module, always refer to "CAUTION" of "General Description" in "AIRBAG SYSTEM" article. < Refer to «CAUTION»(ref-560375-S15420108262013061300000) , General Description. > Using a hexagon wrench wrapped with protective tape, push in the snap pins to disengage the locks (3 places). Disconnect the horn harness and airbag connector, and remove the airbag module. < Refer to «DRIVER'S AIRBAG MODULE»(ref-560375-S42651612422013061300000) , CURTAIN AIRBAG MODULE & PRETENSIONER, PROCEDURE, Airbag Connector. >
4. Remove the steering wheel. CAUTION: Always use the steering wheel puller for removal to avoid deforming the steering wheel. If the steering wheel has been removed, make sure that the steering roll connector is not turned from the original position. PREPARATION TOOL: Steering wheel puller Disconnect the connector and remove the nut. Put alignment marks and remove the steering wheel.

LIMIT

Make a measurements as follows. If it exceeds the specified service limits, adjust or replace.

Note. When fixing the steering gearbox assembly in a vise, apply a wooden piece on the flange portion.

Rack shaft sliding resistance (Except for XV model)

Limit: 350 N (36 kgf, 79 lbf) or less

Left/right differential of sliding resistance: 20% or less

Rack shaft sliding resistance (XV model)

Limit: 333 N (34 kgf, 75 lbf) or less

Left/right differential of sliding resistance: 20% or less

Scheme 57

RACK SHAFT PLAY IN THE RADIAL DIRECTION

Right-turn steering

Service limit

Direction <== ==>: 0.4 mm (0.016 in) or less

Direction <== ==>: 0.6 mm (0.024 in) or less

Left-turn steering

Service limit

Direction <== ==> <== ==>: 0.4 mm (0.016 in) or less

Condition

L: 5 mm (0.20 in)

P: 98 N (10 kgf, 22 lbf)

Scheme 58

INPUT SHAFT PLAY

In radial direction

Wear limit: 0.18 mm (0.0071 in) or less

Condition: P = 98 N (10 kgf, 22 lbf)

In axial direction

Service limit: 0.27 mm (0.0106 in) or less

Condition: P = 20 - 49 N (2 - 5 kgf, 4 - 11 lbf)

Scheme 59

Scheme 60

1. Using the ST, measure the rotational resistance of the steering gearbox assembly. Preparation tool: ST: SPANNER (34099PA100) Service limit (Except for XV model): Maximum allowable resistance: 18.3 N (1.9 kgf, 4.1 lbf) or less Difference between right and left rotational resistance: 20% or less Service limit (XV model): Maximum allowable resistance: 17.7 N (1.8 kgf, 4.0 lbf) or less Difference between right and left rotational resistance: 20% or less

Scheme 61

1. Remove the steering gearbox assembly. < Refer to «REMOVAL»(ref-560370-S12738617832013061300000) , Electric Power Steering Gearbox. >
2. Loosen the lock nut and adjusting screw.
3. Apply a coat of grease to the sliding surface (B) of the pad - pressure (a) and seating surface (C) of spring - gearbox (b), and then insert the pad - pressure (a) into steering body.
4. Charge the adjusting screw (c) with grease (D), and then insert the spring - gearbox (b) into adjusting screw. Then install on the steering body. Grease: Multemp AC-P
5. Apply liquid gasket to 1/3 or more (A) of entire perimeter of adjusting screw thread (c). Liquid gasket: THREE BOND TB-1111B
6. Tighten the adjusting screw to 9.8 N.m (1.0 kgf-m, 7.2 ft-lb), then loosen it.
7. Tighten the adjusting screw to 6 N.m (0.6 kgf-m, 4.4 ft-lb).
8. Loosen the adjusting screw by 20°.
9. While fixing the adjusting screw, tighten the lock nuts. Tightening torque: 49.4 N.m (5.04 kgf-m, 36.4 ft-lb)

Scheme 62

1. Adjust the front toe. < Refer to «FRONT WHEEL TOE-IN»(ref-560366-S32597854752013061300000) , ADJUSTMENT, Wheel Alignment. >
2. Check the steering angle of the wheels. STANDARD OF STEERING ANGLE Model Except for XV model XV model Inner wheel 38.3°±1.5° 38.5°±1.5° Outer wheel 33.7°±1.5° 34.0°±1.5°
3. When the steering wheel is in the following condition, perform the steering wheel installation over again. When wheels are set in the straight ahead position, the steering wheel spokes are not horizontal. Error is more than 5° on the periphery of the steering wheel.
4. If the steering wheel spokes are not horizontal with vehicle set in the straight ahead position after this adjustment, correct it by turning the right and left tie-rods in the opposite direction from each other by the same angle. Also check that there are no abnormal steering force, failure of the steering wheel to return or other faults.

Scheme 63

1. Disconnect the ground cable from battery.
2. Remove the power steering control module. Disconnect the connector of the power steering control module. Remove the nuts, and remove the power steering control module.

MEASUREMENT OF STEERING EFFORT

Step Check Yes No 1 CHECK STEERING WARNING LIGHT. Does the STEERING warning light illuminate? Read the DTC, and inspect according to it. Go to step 2 . 2 CHECK STEERING WARNING LIGHT. Connect the Subaru Select Monitor, and turn the steering wheel. (one lock to lock) Check the "EPS operation flag" in the current data. Is the EPS operation flag normal without displaying any DTC code? Go to step 3 . If the EPS operation flag is "Assist limitation", stop the engine for approx. 10 minutes and perform the procedures from step 1 again. 3 CHECK STEERING EFFORT. Stop the vehicle on paved road. Set the tire air pressure to the specification. Start the engine. Run the engine at idle. Install a spring scale on the steering wheel. Pull the spring scale at a right angle to the steering wheel, and measure both right and left steering wheel efforts. Is the steering effort less than 29.4 N (3.0 kgf, 6.6 lbf)? Go to step 4 . Go to step 8 . 4 CHECK STEERING EFFORT. Stop the engine. Pull the spring scale at a right angle to the steering wheel, and measure both right and left steering wheel efforts. Is the steering effort less than 294.2 N (30 kgf, 66.2 lbf)? Go to step 5 . Perform the inspection or adjustment around the suspension part. 5 CHECK TORQUE SENSOR OUTPUT VALUE. Connect the Subaru Select Monitor. Read the output of torque sensor voltage. NOTE: When measuring, place the steering wheel at the center position. Is the voltage 2.425 - 2.575 V? Go to step 6 . Replace the gearbox assembly. < Refer to ELECTRIC POWER STEERING GEARBOX . > 6 CHECK TORQUE SENSOR OUTPUT VALUE. Remove the universal joint assembly - steering. Connect the Subaru Select Monitor. Read the output of torque sensor voltage. Is the voltage 2.425 - 2.575 V? Go to step 7 . Replace the gearbox assembly. < Refer to ELECTRIC POWER STEERING GEARBOX . > 7 CHECK TORQUE SENSOR OUTPUT VALUE. Remove the universal joint assembly - steering. NOTE: Check that the universal joint assembly - steering moves up and down smoothly without installing the bolt. Then tighten the bolts first on the gearbox side and then on the column shaft side. Connect the Subaru Select Monitor. Read the output of torque sensor voltage. Is the voltage 2.425 - 2.575 V? Go to step 8 . Check the universal joint assembly - steering. < Refer to ELECTRIC POWER STEERING GEARBOX . > 8 CHECK STEERING WHEEL EFFORT. Remove the universal joint assembly - steering. Measure the steering wheel effort. Is the steering effort less than 2.26 N (0.23 kgf, 0.51 lbf)? Go to step 9 . Replace the column assembly - steering. < Refer to ELECTRIC POWER STEERING GEARBOX . > 9 CHECK STEERING WHEEL EFFORT. Measure the steering wheel effort. Is the difference of steering effort between right and left less than 20%? Go to step 10 . Replace the column assembly - steering. < Refer to STEERING COLUMN . > 10 CHECK UNIVERSAL JOINT ASSEMBLY - STEERING. Measure the swing torque of joint. (Yoke of column assembly - steering side) < Refer to INSPECTION , Universal Joint. > Is the swing torque of the universal joint assembly - steering less than 7.3 N (0.74 kgf, 1.64 lbf)? Go to step 11 . Replace the universal joint assembly - steering with a new part. < Refer to UNIVERSAL JOINT . > 11 CHECK UNIVERSAL JOINT ASSEMBLY - STEERING. Measure the swing torque of joint. (Yoke of gearbox side) < Refer to INSPECTION , Universal Joint. > Is the swing torque of the universal joint assembly - steering less than 3.8 N (0.39 kgf, 0.86 lbf)? Go to step 12 . Replace the universal joint assembly - steering with a new part. < Refer to UNIVERSAL JOINT . > 12 CHECK FRONT WHEEL. Check the front wheels. Does the front wheels have unsteady revolution or rattling, or does the brake drag? Inspect, readjust and replace if necessary. Go to step 13 . 13 CHECK TIE-ROD ENDS. Remove the tie-rod ends. Does the tie-rod ends of suspension have unsteady revolution or rattling? Inspect and replace if necessary. Go to step 14 . 14 CHECK BALL JOINT. Remove the ball joint. Does the ball joints of suspension have unsteady revolution or rattling? Inspect and replace if necessary. Go to step 15 . 15 CHECK GEARBOX. Measure the rotating of gearbox. < Refer to LIMIT , INSPECTION, Electric Power Steering Gearbox. > Except for XV model: Is the turn resistance of the steering gearbox less than 18.3 N (1.9 kgf, 4.1 lbf)? Is the difference between the right and left rotational resistances less than 20%? XV model: Is the turn resistance of the steering gearbox less than 17.7 N (1.8 kgf, 4.0 lbf)? Is the difference between the right and left rotational resistances less than 20%? Go to step 16 . Replace the gearbox assembly. < Refer to ELECTRIC POWER STEERING GEARBOX . > 16 CHECK GEARBOX. Measure the sliding of gearbox. Except for XV model: Is the sliding resistance of the steering gearbox less than 350 N (35 kgf, 79 lbf)? Is the difference between the right and left sliding resistances less than 20%? XV model: Is the sliding resistance of the steering gearbox less than 333 N (34 kgf, 75 lbf)? Is the difference between the right and left sliding resistances less than 20%? Steering effort is normal. Replace the gearbox assembly. < Refer to ELECTRIC POWER STEERING GEARBOX . >