Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 456
6MT(diag)-35
Diagnostics with Phenomenon
MANUAL TRANSMISSION AND DIFFERENTIAL (DIAGNOSTICS)
DCCD AUTO mode display does not illuminate.
• Mode change switch
• Combination meter
• DCCD control module
• Body integrated unit
• CAN communication signal
Will not become differential free or remains differential free.
• Parking brake switch
• Center differential
• Mode change switch
• C.DIFF +/– switch
• Rear differential
• Tire/Wheel
• DCCD relay
• Rear differential oil temperature switch
• DCCD control module
• ECM
• Body integrated unit
• VDCCM&H/U
• Yaw rate & G sensor
• CAN communication signal
ABS does not operate.
• VDCCM&H/U
• CAN communication signal
• Stop light switch
• DCCD control module
• ECM
• Body integrated unit
• Yaw rate & G sensor
Will not lock the differential or the differential is continually
locked.
• VDCCM&H/U
• ABS wheel speed sensor
• CAN communication signal
• Center differential
• C.DIFF +/– switch
• Mode change switch
• Tire/Wheel
• DCCD control module
• DCCD relay
• ECM
• Body integrated unit
• Yaw rate & G sensor
Symptoms
Faulty parts
6MT(diag)-36
Diagnostics with Phenomenon
MANUAL TRANSMISSION AND DIFFERENTIAL (DIAGNOSTICS)
CLUTCH SYSTEM
CL
Page
General Description . . . . . . . . . . . . . . . . . . . . ...2
Clutch Disc and Cover . . . . . . . . . . . . . . . . . . . .11
Flywheel . . . . . . . . . . . . . . . . . . . . . . . . ...14
Release Bearing and Lever . . . . . . . . . . . . . . . . . ..15
Operating Cylinder . . . . . . . . . . . . . . . . . . . . ...19
Master Cylinder . . . . . . . . . . . . . . . . . . . . . . 22
Clutch Pipe and Hose . . . . . . . . . . . . . . . . . . . ..24
Clutch Fluid . . . . . . . . . . . . . . . . . . . . . . . ..25
Clutch Fluid Air Bleeding . . . . . . . . . . . . . . . . . . ..26
Clutch Pedal . . . . . . . . . . . . . . . . . . . . . . . .28
Clutch Switch . . . . . . . . . . . . . . . . . . . . . . ...33
General Diagnostic Table . . . . . . . . . . . . . . . . . . .36
CL-2
General Description
CLUTCH SYSTEM
1. General Description
A: SPECIFICATION
Model
STI
Except for STI
Transmission type
6MT
5MT
Clutch cover
Type
Pull type
Push type
Diaphragm set load
N (kgf, lbf)
9,120 (930, 2051)
7,450 (760, 1,675)
Clutch disc
Facing material
Woven (Non-asbestos)
O.D. × I.D. × thickness
mm (in)
Clutch
cover side
240 × 160 × 3.5 (9.45 × 6.30 × 0.138) 230 × 155 × 3.5 (9.06 × 6.10 × 0.138)
Flywheel
side
240 × 160 × 3.2 (9.45 × 6.30 × 0.126) 230 × 155 × 3.2 (9.06 × 6.10 × 0.126)
Spline outer diameter
mm (in)
25.2 (0.992), (Number of teeth: 24)
Depth of rivet head
mm (in)
Clutch
cover side
1.65 — 2.25 (0.065 — 0.089)
Flywheel
side
1.35 — 1.95 (0.053 — 0.077)
Limit of
sinking
0.8 (0.031)
Deflection limit
mm (in)
0.7 (0.028) at R = 115 (4.53)
0.7 (0.028) at R = 110 (4.33)
Release bearing
Grease-packed self-aligning
Clutch pedal
Full stroke
mm (in)
130 — 135 (5.12 — 5.31)
135 — 140 (5.31 — 5.51)
Free play
mm (in)
5 — 11 (0.20 — 0.43)
Flywheel
Type
Conventional
Flexible
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