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37-2
TORQUE ON DEMAND (T.O.D.) SYSTEM
(Refer to Section 201 for photographs.)
Component
Photo No.
4H/L Transfer Switch
Assembly
On bottom of transfer case.
84
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Brake Switch
Below I/P, on brake pedal support
44
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Clutch Solenoid (Transfer)
In the transfer case (see Section 4B2 of Service Manual)
. . . .
Dash Fuse Box
Behind left I/P side trim panel
36
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Data Link Connector (DLC)
C-63
Below left side of I/P, near engine hood release
38
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Front Speed Sensor
(Transfer)
On rear of transfer case
85
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Fuse/Relay Box
Right side of engine compartment, on inner fender panel
18
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Noise Suppression Filter #1
Behind left kick panel
40
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Rear Speed Sensor
(Transfer)
On rear of transfer case
85
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T.O.D. Control Unit
Below right front seat
66
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Throttle Position (TP) Sensor
Top front of engine, on air intake assembly
25
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Connector
B-7 (10-WHT)
Behind left side of I/P, on rear of meter assembly
49
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C-37 (4-BLK)
Behind lower left of I/P
44
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H-4 (16-BLU)
Left rear of engine compartment on bracket
15
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H-5 (16-GRN)
Left rear of engine compartment on bracket
15
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H-16 (20-WHT)
In floor, below right front seat
66
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H-17 (3-GRY)
In floor, below right front seat
66
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H-18 (20-WHT)
Behind I/P right side panel
58
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H-19 (22-WHT)
Behind I/P right side panel
58
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H-27 (9-WHT)
On right side of third crossmember
82
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M-27 (12-BLK)
On top of transfer case
83
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Ground
C-31
Behind right kick panel
57
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E-28
Top left rear of engine
28
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E-30
Top right rear of engine
32
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P-15
On top of transfer case, on shift lever plate
62
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Circuit Operation
Voltage is applied with the starter switch in ON or
START, through the ELEC. IG. fuse CB-16. The T.O.D.
control unit receives input from the front speed sensor
(transfer) and the rear speed sensor (transfer) and de-
termines if there is any variation. In the event of a varia-
tion in speeds, voltage is applied to the clutch solenoid
(transfer) to apply torque to the front wheels. While volt-
age is being applied to the clutch solenoid (transfer),
the T.O.D. control unit is providing ground to the corre-
sponding indicators in the meter assembly. The T.O.D.
control unit receives input from the throttle position sen-
sor (TPS) in order to determine acceleration and decel-
eration conditions. The T.O.D. control unit receives an
input from the ABS system, when active, to apply volt-
age to the clutch solenoid (transfer).
Component Location Index
AUTOMATIC TRANSMISSION CONTROLS
Component Index
Automatic Transmission Mode Switch
Brake Switch
Cruise Control Unit
Dash Fuse Box
Data Link Connector (DLC) C-63
Electronic Brake Control Module (EBCM)
Fuse/Relay Box
Kickdown Switch
Noise Suppression Filter #1
PCM Main Relay
Powertrain Control Module(PCM)
Transmission Speed Sensor
See Ground
Distribution,
page 14-1.
AUTOMATIC TRANSMISSION CONTROLS
Circuit Schematic
39
HOT AT ALL TIMES
See Dash
Fuse Box,
page 11-5.
5
1
X-9
X-9
2
4
BLK/YEL
BLK/YEL
WHT
See Power
Distribution,
page 10.
BLK
DASH
FUSE
BOX
FUSE/
RELAY
BOX
FUSE/
RELAY
BOX
CB-3
ENGINE
15A
EB-18
PCM
40A
Ignition input
Ground
F16
PCM
MAIN
RELAY
A4
C-1
Battery
input
Engine
Controls
E16
E-28
BLK/BLU
C9
C7
C-2
C8
13
H-5
14
BLK/PNK
C-3
F6
F5
C-47
GRN/RED
Dash and
Console Lights
Power switch
input
Winter switch
input
POWER
SWITCH
LIGHT
POWER/
WINTER
SWITCH
Power
Winter
C-47
1
3
RED/GRN
See Ground
Distribution,
page 14-3.
BLK
BLK
C-46
Dash and
Console
Lights
WINTER
SWITCH
LIGHT
WHT
WHT
RED/BLU
RED/BLU
RED/BLU
C-3
BLU/GRN
BLU/BLK
BLK/BLU
See Ground
Distribution,
pages 14-4
and 14-5.
BLK/RED
E-30
BLK/BLU
BLK/BLU
RED/BLU
HOT IN ON OR START
BLK/RED
See Ground
Distribution,
pages 14-4
and 14-5.
BLK/BLU
WHT
BLK
BLK/RED
C-39
BLK
GRN/RED
VIO/RED
VIO/GRN
4
5
2
RED/GRN
BLK
NOISE
SUPPRESSION
FILTER #1
See Power
Distribution,
page 10-1
GRN/RED
GRN/RED
GRN/
RED
See Ground
Distribution,
page 14-4.
Circuit Schematic
AUTOMATIC TRANSMISSION CONTROLS
39-1
See Dash
Fuse Box,
page 11-5.
DASH
FUSE
BOX
Brake
input
Kickdown
switch input
F4
C-3
C-31
LT BLU
F11
YEL
A/T FLUID
INDICATOR
LIGHT
CHECK
TRANS
INDICATOR
LIGHT
4
13
“A/T OIL TEMP”
warning light
control
A9
ORN/BLU
B-4
7
H-14
14
“CHECK TRANS”
indicator control
A14
C-1
ORN/BLK
POWER
DRIVE
INDICATOR
LIGHT
WINTER
DRIVE
INDICATOR
LIGHT
PNK/
GRN
1
“POWER DRIVE”
indicator control
A11
2
“WINTER DRIVE”
indicator control
A10
B-8
1
2
C-29
C-29
KICKDOWN
SWITCH
Closed with
accelerator pedal
depressed.
POWERTRAIN
CONTROL
MODULE
(PCM)
BLK
8
7
ORN/BLU
ORN/BLK
PNK/WHT
BLK
Indicators
See Ground
Distribution,
page 14-2.
METER
ASSEMBLY
YEL
TP sensor
input
BLU
E8
Engine
Controls
Serial
data
RED
D4
C-2
9
Class 2
data
ORN/GRN
B13
2
DIAG
ORN/BLU
F12
6
16
C-63
DATA LINK CONNECTOR (DLC)
See Ground
Distribution,
page 14-2.
C-31
BLK
BLK/RED
BLK/PNK
E-28
5
C-63
4
C-1
C-3
BLK
RED
RED
Supplemental
Restraint
System
(SRS)
CB-4
METER
15A
CB-13
STOP
LIGHT
15A
HOT AT ALL TIMES
HOT IN ON OR START
Anti-lock
Brake
System
(ABS)
ORN/GRN
ORN/GRN
PNK/
GRN
PNK/WHT
B-8
BLK
FUSE/
RELAY
BOX
EB-2
HORN
10A
HOT AT ALL TIMES
14
Indicators,
Gauges
B-4
YEL
5
BRAKE SWITCH
Closed with
brake pedal
depressed.
C-37A
4
1
C-37A
Brake
Lights
1
C-37
Brake
Lights
NOISE
SUPPRESSION
FILTER #1
GRN
Brake
Lights
RED
RED
4
C-37
RED
RED
GRN
GRN
Shift
Interlock
System
3
H-18
GRN
GRN
GRN
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