Subaru Legacy BN/BS (2015-2019) Service Manual: Specification

Subaru Legacy BN/BS (2015-2019) Service Manual / Brake / General description / Specification

NOTE:

Refer to “PARKING BRAKE” for parking brake specifications. General Description > SPECIFICATION

1. FRONT DISC BRAKE

Item		Specification
Size		16-inch		17-inch
Type		Floating 2-POT piston type Ventilated disc
Effective cylinder diameter	mm (in)	42.8 - 2 (1.685 - 2)
Pad size (Length - Width - Thickness)	mm (in)	137.4 - 49.2 - 12.0 (5.118 - 2.106 - 0.433)		130.0 - 53.5 - 11.0 (5.118 - 2.106 - 0.433)
Pad thickness	mm (in)	Standard	12 (0.47)	11 (0.43)
Pad thickness	mm (in)	Limit	1.5 (0.059)
Effective disc diameter	mm (in)	244 (4.61)		261 (10.28)
Rotor size (Thickness - O.D.)	mm (in)	28 - 294 (1.10 - 11.57)		30 - 316 (1.18 - 12.44)
Disc thickness	mm (in)	Standard	28 (1.10)	30 (1.18)
Disc thickness	mm (in)	Limit	26 (1.02)	28 (1.10)
Disc runout	mm (in)	Standard	—
Disc runout	mm (in)	Limit	0.05 (0.0020)
Clearance adjustment		Automatic adjustment

2. REAR DISC BRAKE

Item		Specification
Size		17-inch
Type		Floating 1-POT piston type (Caliper with electric parking) Ventilated disc
Effective cylinder diameter	mm (in)	40.0 (1.57)
Pad size (Length - Width - Thickness)	mm (in)	86.8 - 43.5 - 9.0 (3.42 - 1.71 - 0.354)
Pad thickness	mm (in)	Standard	9.0 (0.354)
Pad thickness	mm (in)	Limit	1.5 (0.059)
Effective disc diameter	mm (in)	255 (10.44)
Rotor size (Thickness - O.D.)	mm (in)	17 - 300 (0.67 - 11.81 )
Disc thickness	mm (in)	Standard	17 (0.67)
Disc thickness	mm (in)	Limit	15 (0.59)
Disc runout	mm (in)	Standard	—
Disc runout	mm (in)	Limit	0.05 (0.0020)
Clearance adjustment		Automatic adjustment

3. MASTER CYLINDER

Item		Specification
Engine model		H4 model	H6 model
Type		Tandem
Effective diameter	mm (in)	23.8 (15/16)
Reservoir type		Sealed type
Brake fluid reservoir capacity	cm3 (cu in)	240 (14.64)	250 (15.26)

4. BRAKE BOOSTER

Item		Specification
Type		Vacuum suspended
Effective diameter	mm (in)	208 + 229 (8.19 + 9.02)
Brake fluid pressure		Brake pedal force N (kgf, lbf)	Fluid pressure kPa (kgf/cm2, psi)
When engine is stopped		147 (15, 33)	514 (5.24, 74.53)
When engine is stopped		294 (30, 66)	1,551 (16, 225)
When engine is running and vacuum pressure is at 66.7 kPa (500 mmHg, 19.69 inHg)		147 (15, 33)	6,177 (63, 896)
		294 (30, 66)	11,273 (115, 1,635)

5. BRAKE LINE, BRAKE PEDAL AND BRAKE FLUID

CAUTION:

• Do not let brake fluid come into contact with the painted surface of the vehicle body. Wash away with water immediately and wipe off if it is spilled by accident.

• Avoid mixing brake fluid of different brands or different grades even from the same brand to prevent fluid performance from degrading.

• When refilling brake fluid, do not allow dirt or dust to get into the reservoir tank.

• Always use new SUBARU genuine brake fluid when replacing or refilling the fluid. Do not reuse drained brake fluid.

Item			Specification
Brake line			Dual circuit system
Brake pedal	Type		Suspended type
Brake pedal	Free play	mm (in)	0.5 — 2.7 (0.020 — 0.11) [When pulling the brake pedal upward with a force of less than 10 N (1 kgf, 2 lbf)]
Brake fluid			FMVSS No. 116, DOT3, or DOT4

Caution

• When performing any work, always wear work clothes, a work cap and protective shoes. Additionally, wear a helmet, protective goggles, etc. if necessary.• When performing a repair, identi ...

Other materials:

Inspection
1. Remove the bulkhead harness connector from TCM. Transmission Control Module (TCM) > REMOVAL2. Set the ST between the TCM and bulkhead harness.ST 18460AA040CHECK BOARD3. Set the probe of oscilloscope to the check board connector.Terminals:No. 13 (+) — No. 26 (−)(A)+ probe(B)− pro ...