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133-1
120Ć3
Circuit Description
The Passlock
system is provided in order to prevent
vehicle theft if the ignition lock cylinder is forced to
rotate or the ignition switch is operated while separated
from the ignition lock cylinder case. The body control
module (BCM) provides security system sensor power
and low reference for the Passlock
sensor. The BCM
also measures the security system sensor voltage.
When the correct key is used to start the vehicle, a
magnet on the lock cylinder passes close to the
Passlock
sensor within the ignition lock cylinder case.
The magnet activates the security hall effect sensor in
the Passlock
sensor which completes a circuit from
the security sensor signal circuit through a resistor to
the security sensor low reference circuit. The
resistance value will vary from vehicle to vehicle. The
BCM will measure the voltage on the security sensor
signal circuit and compare this voltage to a previously
learned voltage. If the voltage measured is within the
valid range, the BCM will send a class 2 message to the
powertrain control module (PCM) to enable vehicle
starting. If the voltage measured is not within the valid
range, a class 2 message will be sent to the PCM to
disable starting of the vehicle.
Circuit Operation
ANTI-THEFT SYSTEM
133-2
ANTI-THEFT SYSTEM
(Refer to Section 201 for photographs.)
Component
Photo No.
Body Control Module
(BCM)
On Rear Fuse Block, under left rear seat
53
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Underhood
Left side of engine compartment
3
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel Cluster
(IPC)
On the left side of the IP, above the steering column
59
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Passlock Sensor
In the steering column
67
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertrain Control Module
(PCM) (4.2L)
Left front of engine
5
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertrain Control Module
(PCM) (5.3L)
Left front of engine compartment
25
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
C201 (17-BLK), (18-BLK),
and (13-GRY)
At base of steering column
120
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
G102
Left side of engine compartment
4
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
139
SHIFT LOCK CONTROL SYSTEM
Automatic Transmission Shift Lock Actuator
Fuse Block-Rear
Fuse Block-Underhood
Ignition Lock Cylinder Control Actuator
Park/Neutral Position (PNP) Switch
SP201
Stop Lamp Switch
Component Index
139-0
SHIFT LOCK CONTROL SYSTEM
DK GRN/WHT
0.35
BTSI
Fuse 25
10A
HOT IN RUN AND START
FUSE
BLOCK-
REAR
Connector
C2
*E10
**E6
FUSE
BLOCK-
UNDERHOOD
Connector 4.2L
Connector 5.3L
STOP
LAMP
SWITCH
Connector
F
AUTOMATIC
TRANSMISSION
SHIFT LOCK
ACTUATOR
Connector
E
A
E
Park lock
solenoid
A/T
shift lock
control
solenoid
IGNITION
LOCK
CYLINDER
CONTROL
ACTUATOR
Connector
A16
E7
PNK
0.35
AUTOMATIC
TRANSMISSION
SHIFT LOCK
ACTUATOR
Connector
F
C
Ignition
lock
cylinder
control
switch
(Switch
closed
in park)
A
B
C201
Connector
C201
Connector
G201
BLK
0.35
C
SP201
See Ground
Distribution,
page 14-5.
BLK
0.5
A
BLK
0.35
IGN 0
Fuse 47
10A
C1
E7
HOT IN ACC, RUN AND START
See Power
Distribution,
page 10-12.
PNK
0.35
B
LT GRN/BLK
0.35
YEL
0.35
C1
B7
BACK UP
Fuse 27
15A
B2
PNK
0.35
PARK
NEUTRAL
POSITION
(PNP)
SWITCH
Connector
C
B
Park/
Neutral
Position
See Power
Distribution,
page 10-13.
C2
C2
A/T shift
lock control
pole
See Ground
Distribution,
page 14-5.
BLK
0.5
BLK
0.5
YEL
0.35
C2
F4
(Not used)
LT GRN/BLK
0.35
*4.2L
**5.3L
LT GRN
0.35
Circuit Schematic
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