Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 08. MECHANISM AND FUNCTION 32. CONTROL SYSTEM 04. Shift Lock and Key Interlock System
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W1860BE.book Page 7 Tuesday, January 28, 2003 11:01 PM
SHIFT LOCK AND KEY INTERLOCK SYSTEM
CONTROL SYSTEM
4. Shift Lock and Key Interlock System
A: GENERAL
To increase safety during standing start, the shift lock system prevents movement of the select lever
from the "P" position to any other position unless the brake pedal is depressed. This system is also
provided with a key interlock function which prevents removal of the ignition key from the key cylin-
der unless the selector lever is placed in the "P" position.
(A) (B)
(1)
(2)
(7)
(3) (4)
(6)
(5)
CS-00264
(A) Shift lock system (B) Key interlock system
(1) "P" position switch (5) Brake pedal switch
(2) Key cylinder (6) Integrated module
(3) Shift lock solenoid (7) Inhibitor switch
(4) Key lock solenoid
CS-7
W1860BE.book Page 8 Tuesday, January 28, 2003 11:01 PM
SHIFT LOCK AND KEY INTERLOCK SYSTEM
CONTROL SYSTEM
B: SHIFT LOCK SYSTEM OPERATION
The shift lock system has a solenoid-operated plunger (1). With the select lever in the "P" position,
the plunger remains extended, holding the lock arm (2) in its raised (locking) position. When the
brake pedal is depressed with the ignition switch in either the ON or START position, the solenoid
is energized and the plunger is retracted. This causes the lock arm to tilt forward to the select lever
release position. The select lever now can be moved to any other position. The "P" position of the
select lever is detected by the inhibitor switch (3).
(2)
(1)
(3)
CS-00161
(1) Solenoid
(2) Lock arm
(3) Inhibitor switch
CS-8
W1860BE.book Page 9 Tuesday, January 28, 2003 11:01 PM
SHIFT LOCK AND KEY INTERLOCK SYSTEM
CONTROL SYSTEM
C: KEY INTERLOCK FUNCTION
When the select lever is at any position other than "P", the solenoid is energized and its pin is held
extended. Being caused to stay in its upright position by extension of the pin, the interlock lever in-
terferes with the stopper portion of the rotator which turns together with the ignition key. Thus, the
ignition key cannot be rotated to the "LOCK" position.
(18)
(1)
(19)
(2)
(3)
(4)
(5)
(7) (21) (20)
(6)
(8)
(11)
(12)
(9) (9)
(13)
(10)
(14)
A
(15)
(17) (16)
(18) (18)
CS-00078
(1) Column cover (12) Interlock position
(2) Key (13) Stopper
(3) Push button (14) ACC
(4) Extended (15) ON
(5) Solenoid pin (16) START
(6) Solenoid unit (17) View A
(7) Lever fulcrum (18) Rotator
(8) Lever spring (19) Key
(9) Interlock lever (20) Interlock lever
(10) Interlock activated (21) Solenoid
(11) Lock
CS-9
W1860BE.book Page 10 Tuesday, January 28, 2003 11:01 PM
SHIFT LOCK AND KEY INTERLOCK SYSTEM
CONTROL SYSTEM
When the select lever is moved to "P", the "P" position switch in the select lever assembly oper-
ates, deenergizing the solenoid. As the push force of the solenoid pin is removed, the lever spring
causes the interlock lever to tilt and become clear of the rotator's stopper. Then the key can be ro-
tated to the "LOCK" position and removed from the ignition switch.
(1)
(2)
CS-00079
(1) Retracted
(2) Interlock deactivated
CS-10
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