|
|
|
34-7
CRUISE CONTROL: 5.3L
120Ć3
Cruise Control Disengaged
The PCM disengages the cruise control operation
based on the information received from the TAC
module. The TAC module monitors the signal circuits of
the following switches:
S
The On/Off switch
S
The TCC/brake switch
S
The stop lamp switch
The TCC brake switch and the stop lamp switch are
incorporated into an assembly and are mounted to the
brake pedal bracket. Pressing the brake pedal while the
cruise control is engaged will disengaged the cruise
control system. The TAC module monitors the stop
lamp switch signal circuit and the PCM monitors the
TCC brake switch/cruise control release signal circuit.
When the brake pedal is pressed, the normally closed
TCC brake switch opens and the normally open
stoplamp switch closes. The TAC module detects a
high signal voltage on the stop lamp switch signal circuit
and the PCM detects a low signal voltage on the TCC
brake switch/cruise control release signal circuit. The
TAC module sends a UART message to the PCM
indicating the status of the stop lamp switch. The cruise
control system will disengage when the cruise control
On/Off switch is turned Off. The vehicle speed stored in
the memory of the PCM will be erased when the cruise
control On/Off switch is turned to Off, or the ignition
switch is turned off.
The cruise control system will disengage when the
PCM detects that the driver has the accelerator pedal
override active for approximately 60 seconds.
When the cruise control system is disengaged, the
PCM sends a class 2 message to the IPC in order to
deactivate the cruise control indicator.
Cruise Control Inhibited
The PCM inhibits the cruise control operation when any
of the following conditions exist:
S
A cruise control system related DTC has been set.
S
The vehicle speed is less than 40 km/h (25 mph).
S
The vehicle is in PARK, REVERSE, NEUTRAL, or
1st
gear.
S
The engine RPM low.
S
The engine RPM is high.
S
The vehicle speed is to high.
S
The system voltage is not between 6 volts and 16
volts.
S
The antilock brake system/traction control system
is active for more than 2 seconds.
Circuit Operation
34-8
CRUISE CONTROL
(Refer to Section 201 for photographs.)
Component
Photo No.
Accelerator Pedal Position
(APP) Sensor (4.2L)
On the accelerator bracket
63
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accelerator Pedal Position
(APP) Sensor (5.3L)
On the accelerator bracket
63
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Brake Control
Module (EBCM)
Inner left side frame rail (near transmission)
41
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Rear
Under the left rear seat
52
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Underhood
Left side of engine compartment
3
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertrain Control Module
(PCM) (4.2L)
Left front of engine
5
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertrain Control Module
(PCM) (5.3L)
Left front of engine compartment
25
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Lamp Switch
On brake pedal support
64
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Actuator Control
(TAC) Module (5.3L)
Left rear of engine compartment
18
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Actuator Control
(TAC) Sensor (4.2L)
Top rear of engine
6
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Actuator Control
(TAC) Sensor (5.3L)
Right front of engine compartment
21
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal/Multifunction
Switch
On the stalk, on the left side of the steering column
71
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
Connector
C101 (38-BLK)
Left side of engine compartment
3
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C107 (5.3L) (38-BLK)
Left rear of engine compartment
18
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C201 (17-BLK), (18-BLK),
and (13-GRY)
At base of steering column
120
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
G108 (4.2L)
Lower left side of engine
37
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G108 (5.3L)
Lower left side of engine
38
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
36
TRANSFER CASE CONTROL
Body Control Module (BCM)
Front Axle Actuator
Fuse Block-Rear
Fuse Block-Underhood
Instrument Panel Cluster (IPC)
Powertrain Control Module (PCM) (4.2L)
Powertrain Control Module (PCM) (5.3L)
Propshaft Speed Sensor-Front Transfer Case
Propshaft Speed Sensor-Rear Transfer Case
SP201
Transfer Case
Transfer Case Shift Control Module (4WD)
Transfer Case Shift Control Switch
Component Index
36-0
TRANSFER CASE CONTROL
PPL/WHT
0.35
LT BLU
0.35
4WD
Fuse 48
15A
HOT IN RUN
FUSE
BLOCK-
REAR
Connector
C1
E8
BRN
0.5
TRANSFER
CASE
SHIFT
CONTROL
MODULE
(4WD)
Connector
B4
C1
BRN
0.5
TRANSFER
CASE
SHIFT
CONTROL
SWITCH
Connector
A4
A5
A3
B3
2WD
indicator
control
5V
Switch
signal
B8
A6
AFWD
indicator
control
4HI
indicator
control
4LO
indicator
control
Neutral
indicator
control
C1
C2
TAN/BLK
0.35
A
E
PPL/WHT
0.35
F
L
J
240
560
1.1K
M
2.2K
5.1K
2WD
AFWD
4HI
4LO
N
N
4LO
4HI
AFWD
2WD
D
C
B
H
G
B10
C1
FUSE
BLOCK-
REAR
Connector
BODY
CONTROL
MODULE
(BCM)
Connector
C3
B14
LED
dimming
signal
SP201
C
G201
Dash
Lights
BRN/
WHT
0.35
BLK
0.35
BLK
0.35
BRN
0.5
PNK
0.35
GRY
0.35
LT GRN/BLK
0.35
See Ground
Distribution,
page 14-5.
See Dash
and Console
Lights
Illumina-
tion
RIBBON
CABLE
B14
C4
See Dash
and Console
Lights
PPL/WHT
0.35
See Ground
Distribution,
page 14-5.
C1
B8
BLK/WHT
0.35
BLK/WHT
0.8
See Ground
Distribution,
page 14-1.
G102
Circuit Schematic
|
|
|