Acura RL (1996-2004 year). Manual — part 67
72-2
Engine Oil Pressure Indicator Light
UNDER-HOOD
FUSE/RELAY
BOX
C307
1
1
GAUGE
RELAY
UNDER-HOOD
RELAY
BOX C
2
RED/YEL
METER
15A
HOT AT ALL TIMES
See Gauge
Assembly,
page 80-9.
18
ENGINE OIL
PRESSURE
SWITCH
Closed with low
oil pressure
UNDER-DASH
FUSE/RELAY
BOX
PASSENGER’S
MULTIPLEX
CONTROL
UNIT
Voltage
Regulator
ALTERNATOR
See Gauge
Assembly
LOW
ENGINE OIL
PRESSURE
INDICATOR
LIGHT
GAUGE
ASSEMBLY
L
A
2
C104
C123
A
3
C476
6
WHT/BLU
WHT/BLU
WHT/BLU
3
1
20
1
METER
SUN ROOF
7.5A
G402
BLK
See Ground
Distribution,
page 14-12.
YEL/RED
YEL/RED
YEL/RED
YEL/RED
See Power
Distributon,
page 10-10.
C404
8
YEL
YEL
See Power
Distributon,
page 10-10.
14
3
BLK
A
C102
3
YEL/RED
A
22
YEL/RED
BLK
C448
(Terminals 14-16)
Ignition
input
Engine
running
input
Engine oil pressure
switch input
Ground
Ground
’04
WHT/RED
HOT IN ON OR START
WHT/RED
NOTE: The Gauge Relay is
energized with the Ignition
Switch in ON (II) or Start (III).
See Gauge Assembly
page
2004 American Honda Motor Co., Inc.
▼
▼
+
–
72-3
Engine Oil Pressure Indicator Light
How the Circuit Works
The low engine oil pressure indicator light works in
two ways: it flashes continuously following a
momentary loss of pressure, or it comes on and
stays on with a complete loss of engine oil pressure.
When the engine first starts, before its engine oil
pressure rises above 4.3 psi, voltage is applied to
the closed and grounded engine oil pressure switch,
and the light comes on to test the bulb.
With the engine running, voltage is applied at the
WHT/BLU wire of the passenger’s multiplex control
unit. With normal engine oil pressure, the engine oil
pressure switch is open and the low engine oil
pressure indicator light does not come on. If the
engine oil pressure switch closes momentarily
(more than 0.5 second) but then opens again, the
YEL/RED wire at the passenger’s multiplex control
unit will sense ground through the switch. The
passenger’s multiplex control unit will then provide
and remove ground for the low engine oil pressure
indicator light through the YEL/RED wire. The light
will flash on and off until you turn the ignition switch
off. The flashing feature will not work until 30
seconds after initial voltage is applied to the
WHT/BLU wire of the engine oil pressure indicator
flasher circuit. This delay keeps the low engine oil
pressure indicator light from coming on during
engine warmup.
If engine oil pressure falls below 10 psi and does
not increase, the engine oil pressure switch will stay
closed. The low engine oil pressure indicator light
will then come on and stay on.
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
2004 American Honda Motor Co., Inc.
▲
▼
▲
▼
73
Seat Belt, Lights-on, and Ignition Key Reminders
(’96-’03
GRN/BLU)
GRN/RED
)
See Ground
Distribution,
page 14-5
or 14-9.
C327
4
8
C744
7
C
1
5
C307
WHT/YEL
UNDER-HOOD
FUSE/RELAY
BOX
BACK UP RADIO
7.5A
C412
13
WHT/YEL
WHT/YEL
WHT/YEL
WHT/YEL
WHT/YEL
See Power
Distribution,
page 10-15.
Battery
input
Door
switch
input
Door Switch
Closed with
door open.
DRIVER’S
DOOR
LATCH
BLK
12
BLK
BLK
BLK
BLK
19
DOOR
MULTI-
PLEX
CONTROL
UNIT
C744
3
(’96-’03
GRN/BLU)
GRN/RED
)
(’96-’03
GRN/BLU)
GRN/RED
)
Ground
GRN/BLU
G401 (’96-’98)
G251
15
Door
D-line
C412
14
BRN/YEL
B
23
Door
D-line
BRN/YEL
See Ground
Distribution,
page 14-4
or 14-8.
BLU/WHT
2
C431
9
Ignition
Key Switch
Closed with
key in ignition.
STEERING
LOCK
BLK
C409
11
BLU/WHT
BLU/WHT
Ignition key
switch input
BLK
BLU/WHT
C431
7
BLU/WHT
C406
4
BLK
See Ground
Distribution,
page 14-4
or 14-8.
BLK
BLK
Ground
C412
4
BLK
BLK
BLK
A
8
’96-’97
HOT AT ALL TIMES
BLU/WHT
’04
2004 American Honda Motor Co., Inc.
▲
▲
+
–
73-1
Seat Belt, Lights-on, and Ignition Key Reminders
See Headlight
Switch,
pages 100-7
and 100-16.
See Ground
Distribution,
page 14-9
or 14-11.
DRIVER’S
MULTIPLEX
CONTROL UNIT
See Ground
Distribution,
page 14-8 or 14-10.
C
UNDER-
HOOD
FUSE/
RELAY
BOX
METER
15A
RED/BLU
13
Driver’s
seat
belt
switch
input
RED/GRN
UNDER-
DASH
FUSE/
RELAY
BOX
GAUGE RELAY
See Power Distribution,
page 10-10.
METER (’96-’98)
METER
SUN ROOF (’99-’04)
7.5A
See Power
Distribution,
page 10-10.
YEL
YEL
2
(
*
3)
5
2
C307
1
RED/YEL
UNDER-HOOD
RELAY
BOX C
BLK
3
)
(
*
5)
WHT/RED
1
G301
See Ground
Distribution,
page 14-6.
RED/GRN
C415
6
RED/GRN
See Gauge Assembly,
page 80, 80-5 or 80-9.
WHT/RED
2
RED/BLU
C504
12
RED/BLU
DRIVER’S
SEAT
BELT
SWITCH
Shown with
seat belt
unbuckled.
RED/BLU
C660
3
BLU/RED
G651
C660
1
BLK
C331
9
7
)
(Canada 4)
HEAD
OFF
AUTO
PARK
See Headlights
Headlight
Switch
COMBINATION
LIGHT
SWITCH
BLK
BLK
RED/BLK
See Ground
Distribution,
page 14-16.
BLK
RED/BLU
BLU/RED
SMALL LIGHT
7.5A
C306
3
RED/BLK
G401
BLK
BLK
B
*
= ‘96-’97
TAIL-
LIGHT
RELAY
UNDER-
HOOD
RELAY
BOX C
2
1
‘96-‘98
‘99-’04
G401
HOT IN ON OR START
HOT WITH HEADLIGHT
SWITCH IN PARK OR HEAD
HOT AT ALL TIMES
HOT AT ALL TIMES
To page
73-2 or 73-3.
To page
73-2 or 73-3.
From page
73-2 or 73-3.
From page
73-2 or 73-3.
2004 American Honda Motor Co., Inc.
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