Subaru Outback (BR): Basic Diagnostic Procedure of Parking Brake

A: PROCEDURE

CAUTION: When removing or installing, remove all foreign matter (dust, water, and oil) from the electronic parking brake control module connectors.

NOTE:

• To check the harness for open or short circuits, shake problem spot or connector.
• Refer to "Check List for Interview". <Ref. to PB(diag)-4, Check List for Interview.>

Check List for Interview

A: CHECK

Check the following item about the vehicle's state.

1. STATE OF BRAKE WARNING LIGHT

2. STATE OF ELECTRONIC PARKING BRAKE WARNING LIGHT (C6 MODEL ONLY)

3. HILL HOLD INDICATOR LIGHT CONDITION

4. CONDITIONS UNDER WHICH TROUBLE OCCURS

General Description

A: CAUTION

1. SUPPLEMENTAL RESTRAINT SYSTEM "AIRBAG"

Airbag system wiring harness is routed near the parking brake switch, hill hold switch and electronic parking brake control module.

CAUTION:

• Do not use electrical test equipment on the airbag system circuits.
• Be careful not to damage the airbag system wiring harness, when servicing the parking brake switch, hill hold switch and electronic parking brake control module.

B: INSPECTION

Before performing diagnosis, inspect the following items which may influence parking brake system problems.

1. BATTERY

Measure the battery voltage and specific gravity of the electrolyte.

Standard voltage: 12 V or more

Specific gravity: 1.260 or more

2. GROUND

Check the tightening torque of ground (GB-9 and 10) bolts of the parking brake system.

Tightening torque: 13 N*m (1.3 kgf-m, 9.6 ft-lb)

3. BRAKE DRAG

Check for brake drag.

4. PARKING BRAKE ASSEMBLY

Check and adjust the parking brake assembly.

• Check the disc rotor inner diameter and lining thickness. <Ref. to PB-15, INSPECTION, Parking Brake Assembly (Rear Disc Brake).>
• Adjust the shoe clearance. <Ref. to PB-15, ADJUSTMENT, Parking Brake Assembly (Rear Disc Brake).>

5. TIRE

Check the tire specifications, tire wear and air pressure.

<Ref. to WT-2, SPECIFICATION, General Description.>

C: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

Electrical Component Location

A: LOCATION

1. Electronic parking brake control module
2. Parking brake switch
3. Hill hold switch
4. Hill hold indicator light
5. Electronic parking brake warning light (C6 model only)
6. Brake warning light (C0, C5 and C6 models)
7. Brake warning light (U4, U5 and U6 models)
8. Clutch stroke sensor (MT model only)
9. VDC control module and hydraulic control unit (VDCCM&H/U)
10. Body integrated unit
11. Engine control module (ECM)
12. Data link connector

Control Module I/O Signal

A: ELECTRICAL SPECIFICATION

NOTE: The terminal numbers of the electronic parking brake control module connectors are as indicated in the figure.

B: WIRING DIAGRAM

1. Battery
2. Ignition switch
3. Electronic parking brake CM
4. Engine control module (ECM)
5. VDC control module
6. Transmission control module
7. Combination meter
8. Body integrated unit
9. Clutch stroke sensor (MT model only)
10. Hill hold switch
11. Parking brake switch
12. Hill hold indicator light
13. Electronic parking brake warning light (C6 model only)
14. Brake warning light

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