Acura RL (1996-2004 year). Manual — part 72
+
–
80-11
Gauge Assembly
‘04
See Ground Distribution,
pages 14-9, and 14-11.
Main Circuit
From page
80-10.
GAUGE
ASSEMBLY
19
PNK
B
C
SELECT/
RESET
SWITCH
SELECT/
RESET
SWITCH
LIGHT
5
RED/BLK
4
RED
2
See Ground Distribution,
page 14-4.
BLK
BLK
1
GRN/WHT
3
3
BLK/WHT
4
Select
Reset
G251
10
A
18
RED/BLK
B
G401
BLK
LIGHTS-ON
INDICATOR
LIGHT
To page
80-12.
POINTER
LIGHT
GAUGE
BACKLIGHT
IMMOBILIZER
INDICATOR
LIGHT
Meter Panel and LCD
Dimming Circuit
ODO/
Trip
Indicator
Outside
Air
Temperature
Safety
Display
BLK
Pointer
Dimming Circuit
2004 American Honda Motor Co., Inc.
80-12
Gauge Assembly
‘04
To page
80-13.
21
RED/
BLU
B
RIGHT
TURN
SIGNAL
INDICATOR
LIGHT
LEFT
TURN
SIGNAL
INDICATOR
LIGHT
VSA
INDICATOR
LIGHT
SRS
INDICATOR
LIGHT
SEAT BELT
REMINDER
INDICATOR
LIGHT
VSA
SIDE
AIRBAG
INDICATOR
LIGHT
– +
CHARGING
SYSTEM
INDICATOR
LIGHT
LOW
ENGINE
OIL
PRESSURE
INDICATOR
LIGHT
ABS
INDICATOR
LIGHT
GAUGE
ASSEMBLY
From page
80-10.
SRS
Indicator
Circuit
13
GRN/YEL
From page
80-11.
VSA
Indicator
Circuit
12
PNK/BLU
A
5
WHT/BLU
A
21
GRN
A
3
YEL/RED
A
15
BLU/WHT
B
22
LT GRN/RED
B
6
BLU/WHT
B
See
Engine Oil
Pressure
Indicator
Light
See Vehicle Stability
Assist (VSA) System
ABS
Indicator
Circuit
2004 American Honda Motor Co., Inc.
+
–
80-13
Gauge Assembly
‘04
See Climate
Control Unit,
page 60-1.
HIGH BEAM
INDICATOR
LIGHT
GAUGE
ASSEMBLY
RED/GRN
20
B
HIGH BEAM
INDICATOR
LIGHT
DRL
INDICATOR
LIGHT
Canada
From page
80-12.
USA
3
BLU/YEL
B
4
LT GRN/
RED
A
1
BLU
7
GRY
B
2
YEL/BLU
A
20
GRY
19
BRN/WHT
16
RED/BLU
B
6
YEL
C
Main Circuit
PNK/BLU
PNK/BLU
A
2
Sensor
ground
CLIMATE
CONTROL
UNIT
BLK
C212
2
BRN/WHT
C476
9
C201
7
BRN/WHT
OUTSIDE AIR
TEMPERATURE
SENSOR
BLK
C212
2
BRN/
WHT
BRN/WHT
2004 American Honda Motor Co., Inc.
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80-14
Gauge Assembly
How the Circuit Works
The gauge assembly receives battery voltage at all
times through fuse 56 and through fuse 20 (’96-’03)
with the ignition switch in ON (ll) or START (lll). The
gauge assembly also receives battery voltage
through fuse 55 and the gauge relay with the
ignition switch in ON (ll) or START (lll).
Speedometer and Odometer
The speedometer and odometer drive circuits
receive pulses from the vehicle speed sensor
(VSS). The pulse rate increases as the vehicle
speed increases. This speed signal is converted
and displayed by the speedometer, odometer, and
trip meter.
Tachometer
The tachometer drive circuit receives pulses at the
rate of three pulses per engine revolution from the
powertrain control module (PCM). The pulse
frequency increases as the engine speed
increases. This speed signal is converted and
displayed by the tachometer.
WARNING
Do not smoke while working on the fuel system.
Keep open flame away from the work area.
Drain fuel only into an approved container.
Fuel Gauge
The fuel gauge contains two intersecting coils and a
permanent magnet rotor assembly which displays
the fuel level even with the ignition switch in the
LOCK (0) position. The fuel gauge sensor controls
the magnetic field which varies the current to the
fuel gauge and causes the gauge pointer to move.
The fuel gauge indicates a full tank when the
sender resistance is 3.5 to 5 ohms. The fuel gauge
indicates a half tank when the sender resistance is
29.5 to 35.5 ohms. The fuel gauge indicates an
empty tank when the sender resistance is 105 to
108 ohms.
Engine Coolant Temperature Gauge (’96-’02)
The engine coolant temperature gauge contains two
intersecting coils and a permanent magnet rotor
assembly which displays the coolant temperature
even with the ignition switch in the LOCK (0)
position. The coolant temperature sending unit
controls the magnetic field which varies the current
to the coolant temperature gauge and causes the
gauge pointer to move. The coolant temperature
gauge indicates hot, 85
C (185
F) to 100
C (212
F), when the sender resistance is 46 to 30 ohms.
The gauge indicates cold, 56
C (133
F), when the
sender resistance is 137 ohms.
Engine Coolant Temperature Gauge (’03-’04)
The main circuit built into the gauge assembly
controls the engine coolant temperature. The main
circuit receives its input signal from the Engine
Coolant Temperature Sensor (ECT) through the
Powertrain Control Module (PCM). The Engine
Coolant Temperature Sensor (ECT) is a
temperature dependent resistor (thermistor) whose
resistance decreases as the coolant temperature
increases.
Outside Air Temperature Display
The outside air temperature display receives
temperature information from the outside air
temperature sensor through the BRN/WHT wire.
The gauge assembly converts this signal into a
digital display. The climate control system also uses
this sensor.
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
2004 American Honda Motor Co., Inc.
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