Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 108

SP(STI)-2

General Description

SPEED CONTROL SYSTEMS

1. General Description

A: SPECIFICATION

B: COMPONENT

Accelerator pedal

Stroke

At pedal pad

50 — 59 mm (1.97 — 2.32 in)

(1)

Accelerator pedal ASSY

(4)

Accelerator stopper

Tightening torque: N·m (kgf-m, ft-lb)

(2)

Clip

(5)

Accelerator pedal bracket

T: 18 (1.8, 13.3)

(3)

Accelerator plate

SP-02066

T

T

(1)

(5)

(4)

T

T

(3)

(2)

SP(STI)-3

General Description

SPEED CONTROL SYSTEMS

C: CAUTION

• Prior to starting work, pay special attention to the following:

1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective

goggles, etc. if necessary.
2. Protect the vehicle using a seat cover, fender cover, etc.
3. Prepare the service tools, clean cloth, containers to catch grease and oil, etc.

• Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated

parts.

• When performing a repair, identify the cause of trouble and avoid unnecessary removal, disassembly and

replacement.

• Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from battery.

• Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.

• Remove contamination including dirt and corrosion before removal, installation, disassembly or assembly.

• Keep the removed parts in order and protect them from dust and dirt.

• All removed parts, if to be reused, should be reinstalled in the original positions with attention to the correct

directions, etc.

• Bolts, nuts and washers should be replaced with new parts as required.

• Be sure to tighten the fasteners including bolts and nuts to the specified torque.

D: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

1B022XU0

SUBARU SELECT
MONITOR III KIT

Used for inspecting the accelerator pedal.

TOOL NAME

REMARKS

Circuit tester

Used for measuring voltage.

ST1B022XU0

SP(STI)-4

Accelerator Pedal

SPEED CONTROL SYSTEMS

2. Accelerator Pedal

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Disconnect the connector (A).

3) Remove the nut (B) securing accelerator pedal

assembly, and remove the accelerator pedal as-

sembly.

B: INSTALLATION

Install in the reverse order of removal.
Tightening torque:

18 N·m (1.8 kgf-m, 13.3 ft-lb)

C: DISASSEMBLY

NOTE:

The accelerator pedal cannot be disassembled.

D: INSPECTION

1. CHECK ACCELERATOR PEDAL SEN-

SOR AREA (METHOD WITH CIRCUIT

TESTER)

1) Remove the lower inner trim of passenger’s

side. <Ref. to EI-57, REMOVAL, Lower Inner

Trim.>

2) Turn over the floor mat of passenger’s seat.

3) Remove the protect cover.

4) Remove the nuts and bolts which hold the ECM

to the bracket.

5) Turn the ignition switch to ON. (engine OFF)

6) Measure the voltage between ECM connector

terminals.

• Main sensor side

IN-00203

SP-02067

(B)

(B)

(A)

(A) To ECM connector

FU-03416

FU-03417

SP-02078

V

(A)

5

6

7

8

2

1

9

4

3

10

24

22

25

11

12

13

14

15

26

27

28

16

17

18

19

20

21
29

30

23
31

32

33

34

35

SP(STI)-5

Accelerator Pedal

SPEED CONTROL SYSTEMS

• Sub sensor side

7) After inspection, install the related parts in the

reverse order of removal.
Tightening torque:

7.5 N·m (0.8 kgf-m, 5.5 ft-lb)

2. CHECK ACCELERATOR PEDAL SEN-

SOR AREA (METHOD WITH SUBARU SE-

LECT MONITOR)

1) Turn the ignition switch to ON. (engine OFF)

2) Read the accelerator pedal opening angle signal

and voltage of accelerator pedal sensor using Sub-

aru Select Monitor. <Ref. to EN(H4DOTC)(diag)-

41, READ CURRENT DATA FOR ENGINE (NOR-

MAL MODE), OPERATION, Subaru Select Moni-

tor.>

3. OTHER INSPECTIONS

1) Check that the accelerator pedal does not have

deformation, cracks or damage.

2) Check for smooth operation when the accelera-

tor pedal is depressed.

3) Check if the accelerator pedal returns to its orig-

inal position smoothly when the pedal is released.

(A) To ECM connector

Accelerator

pedal sensor

Accelerator

pedal

Terminal No.

Standard

Main

Not depressed
(Full closed)

23 (+) and

29 (–)

0.4 — 1.0 V

Depressed
(Full opened)

2.4 — 3.7 V

Sub

Not depressed
(Full closed)

31 (+) and

30 (–)

0.3 — 1.1 V

Depressed
(Full opened)

2.3 — 3.8 V

Accelerator

pedal sensor

Accelerator pedal

opening angle signal

Standard

Main

0.0%

0.4 — 1.0 V

100.0%

2.4 — 3.7 V

Sub

0.0%

0.3 — 1.1 V

100.0%

2.3 — 3.8 V

SP-02079

V

(A)

5

6

7

8

2

1

9

4

3

10

24

22

25

11

12

13

14

15

26

27

28

16

17

18

19

20

21
29

30

23
31

32

33

34

35