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Engine Coolant Temperature Gauge
The engine coolant temperature gauge consists of two
intersecting coils wound around a permanent magnet
rotor. When voltage from the C-11 fuse is applied to the
coils, a magnetic field is generated. This causes the ro-
tor to rotate and the gauge needle to move.
The mag-
netic field is controlled by the sensor through the PCM.
As the resistance in the sender/sensor varies, current
through the gauge coils changes. The gauge needle
moves according to the changing magnetic field.
Fuel Gauge
The fuel gauge consists of two intersecting coils wound
around a permanent magnet rotor (see engine coolant
temperature gauge for operation). The powertrain con-
trol module (PCM) monitors the fuel level by the resis-
tance level in the fuel tank unit. The fuel tank unit resis-
tance varies from approximately 80 ohms with the fuel
tank full to 290 ohms with the tank empty. The PCM
then uses this information to control the fuel gauge.
Tachometer
The tachometer displays engine speed in RPM. Volt-
age pulses are taken from the ignition system and sent
to the tachometer. The tachometer responds to the fre-
quency of the voltage pulses, which increases with en-
gine speed. Solid-state circuits process these pulses
into a signal that causes the gauge needle to move.
GAUGES
Circuit Operation
81Ć2
Component Location Index
(Refer to Section 201 for photographs.)
Component
Photo No.
Auto A/C Control Unit
Center of I/P
. . . . . . . . . .
Dash Fuse Box
Behind left I/P side trim panel
42
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Coolant Temperature
(ECT) Sensor
Left front of engine
32
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Tank Unit
Fuse/Relay Box
Right side of engine compartment
8
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Meter Assembly
Left side of I/P
55
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MID Control Unit
Center of I/P
65
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertrain Control Module
(PCM)
Left side of engine compartment
26
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
F-1 (4-BLK)
Top of fuel tank
. . . . . . . . . . . . . . . . . . .
E-11 (2-BLK)
Left front of engine
32
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-4 (52-GRY)
Left side of engine compartment
31
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-9 (20-BLU)
Behind left kick panel
47
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-10 (22-BLK)
Behind left kick panel
46
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-16 (16-WHT)
Behind left kick panel
46
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-19 (22-WHT)
Below driver’s seat
56
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-20 (20-GRY)
Center of I/P
66
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-22 (14-GRN)
Top of meter assembly
54
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-23 (16-GRN)
Top of meter assembly
54
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-24 (30-GRN)
Top of meter assembly
54
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
C-26
Left side of engine compartment
25
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MID SYSTEM
Audio and Switch Assembly
Auto A/C Control Unit
Dash Fuse Box
Fuel Tank Unit
GPS Receiver Unit
Keyless Entry and Anti-Theft Control Unit
MID Control Unit
MID Display
Powertrain Control Module (PCM)
Vehicle Speed Sensor
Component Index
83
MID SYSTEM
HOT AT ALL TIMES
RED/WHT
16
DASH
FUSE
BOX
HOT IN ACC OR ON
7
RED/YEL
RED/WHT
RED/YEL
RED/YEL
RED/
WHT
See Dash
Fuse Box,
page 11-5.
14
WHT/BLU
WHT/BLU
WHT/BLU
See Dash
Fuse Box,
page 11-6.
HOT IN ON
MID DISPLAY
Solid-state:
Do not check
resistance.
B-9
15
BLK
GRN/RED
6
5
RED/GRN
Dash and
Console Lamps
Page 117
Dash and
Console Lamps
Page 117
Sound
System
Page 150
2
YEL/RED
YEL/BLU
YEL/GRN
AUDIO AND
SWITCH
ASSEMBLY
Solid-state:
Do not check
resistance.
9
22
21
Sound System
Page 150-2
9
3
6
RED/WHT
LT BLU
AUTO A/C
CONTROL
UNIT
Solid-state:
Do not check
resistance.
I-20
Connector
15
10
9
Automatic
A/C Controls
Page 65
I-19
Connector
20
7
WHT
See Ground
Distribution,
page 14-1.
BLK
LT GRN/WHT
RED/WHT
WHT/BLU
RED/YEL
RED/YEL
I-12
Connector
I-12
Connector
I-18
I-18
C-2
AUDIO
15A
C-18
AUDIO MIRROR
10A
C-15
ELEC. IG.
15A
Data
line
Data
line
Data
line
Data
line
Data
line
Data
line
Data
line
Data
line
Data
line
C-7
DOOR
LOCK
20A
Keyless
Entry
System
Page 133
HOT AT ALL TIMES
LT
GRN/
WHT
Circuit Schematic
83-1
MID SYSTEM
POWERTRAIN
CONTROL
MODULE (PCM)
Solid State:
Do not check
resistance.
6
YEL/RED
2
H-10
Connector
YEL/RED
E-35
Connector
48
60
H-9
Connector
I-13
Connector
YEL/RED
36
H-4
Connector
H-4
Connector
H-19
Connector
H-10
Connector
12
BLK
H-4
Connector
13
See Ground
Distribution,
page 14-7.
E-23
BLK
3
E-43
Connector
VEHICLE
SPEED
SENSOR
(VSS)
2WD
4WD
2
E-43
Connector
BLK/YEL
BLK/YEL
Intelligent
Suspension
System
Page 38-1
BLK/YEL
BLK/YEL
BLK/YEL
Automatic A/C
Controls
Page 65-3
Sound System
Page 150-2
Vehicle Speed
Sensor
Page 33
BLU/YEL
12
BLU/YEL
ORN/GRN
11
ORN/GRN
*3
2
*2
1
15
16
BLU/YEL
ORN/GRN
Fuel
Gauge
Page
81-1
5
GRN
1
GRN
GRN
49
YEL/RED
MID
CONTROL
UNIT
Solid-state:
Do not check
resistance.
16
15
BLU/YEL
ORN/GRN
FUEL
TANK
UNIT
F
E
FUEL
TANK
SENDER
3
2
F-1
Connector
3
PNK
PNK/BLK
PNK/WHT
MID DISPLAY
Solid-state:
Do not check
resistance.
1
8
10
4
12
1
8
7
9
10
11
2
WHT/BLU
25
I-1
Connector
GPS
RECEIVER
UNIT
Solid-state:
Do not check
resistance.
LT GRN/WHT
RED/WHT
WHT/BLU
RED/YEL
4
3
1
7
5
I-16
Connector
2
8
BLU/GRN
BLU/YEL
RED/BLU
YEL/WHT
YEL/GRN
8
BLU/YEL
I-12
Connector
BLK/YEL
KEYLESS
ENTRY and
ANTI-THEFT
CONTROL
Solid-state:
Do not check
resistance.
YEL/RED
I-13
Connector
50
E-35
Connector
B-9
BLK
See Ground
Distribution,
page 14.
BLK
14
*
=
Without Intelligent
Suspension Control
System
Circuit Schematic
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