Acura RL (1996-2004 year). Instruction — page 67

72-2

Engine Oil Pressure Indicator Light

UNDER-HOOD
FUSE/RELAY
BOX

PHOTO 33

C307

PHOTO 37
VIEW 47

1

1

GAUGE
RELAY

PHOTO 27

UNDER-HOOD
RELAY
BOX C

PHOTO 23

2

RED/YEL

FUSE 55

METER
15A

HOT AT ALL TIMES

See Gauge
Assembly,
page 80-9.

18

ENGINE OIL
PRESSURE
SWITCH
Closed with low
oil pressure

PHOTO 7

UNDER-DASH
FUSE/RELAY
BOX

PHOTO 75

PASSENGER’S
MULTIPLEX
CONTROL
UNIT

PHOTO 107
VIEW 112

Voltage
Regulator

ALTERNATOR

PHOTO 29

See Gauge
Assembly

LOW
ENGINE OIL
PRESSURE
INDICATOR
LIGHT

GAUGE
ASSEMBLY

PHOTO 212
VIEW 113

L

A

2

C104

PHOTO 48
VIEW 56

C123

PHOTO 7
VIEW 2

A

3

C476

PHOTO 97
VIEW 94

6

See
Charging
System

WHT/BLU

WHT/BLU

WHT/BLU

3

1

20

1

FUSE 13

METER
SUN ROOF
7.5A

G402

PHOTO 106

BLK

See Ground
Distribution,
page 14-12.

YEL/RED

YEL/RED

YEL/RED

YEL/RED

See Power
Distributon,
page 10-10.

C404

PHOTO 76
VIEW 49

8

YEL

YEL

See Power
Distributon,
page 10-10.

14

3

BLK

A

C102

PHOTO 48
VIEW 54

3

YEL/RED

A

22

YEL/RED

BLK

C448
(Terminals 14-16)

PHOTO 111
VIEW 80

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

80-9

.

2004 American Honda Motor Co., Inc.

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How the Circuit Works

How the Circuit Works

+

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.

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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

PHOTO 73
VIEW 89

4

8

C744

PHOTO 142
VIEW 33

7

C

1

5

C307

PHOTO 37
VIEW 47

WHT/YEL

UNDER-HOOD
FUSE/RELAY
BOX

PHOTO 33

FUSE 56

BACK UP RADIO
7.5A

C412

PHOTO 110
VIEW 96

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

PHOTO 142

BLK

12

BLK

BLK

BLK

BLK

19

DOOR

MULTI-

PLEX

CONTROL

UNIT

PHOTO 137

VIEW 87

C744

PHOTO 142
VIEW 33

3

(’96-’03

GRN/BLU)

GRN/RED

)

See
Safety
Indicator

(’96-’03

GRN/BLU)

GRN/RED

)

Ground

GRN/BLU

G401 (’96-’98)

PHOTO 79

G251

PHOTO 46

15

Door
D-line

C412

PHOTO 110
VIEW 96

14

BRN/YEL

B

23

Door
D-line

BRN/YEL

See Ground
Distribution,
page 14-4
or 14-8.

BLU/WHT

2

C431

PHOTO 82
VIEW 28

9

Ignition
Key Switch
Closed with
key in ignition.

STEERING

LOCK

PHOTO 87

BLK

C409

PHOTO 79
VIEW 61

11

BLU/WHT

See
DPMS

BLU/WHT

Ignition key
switch input

BLK

BLU/WHT

C431

PHOTO 82
VIEW 28

7

BLU/WHT

C406

PHOTO 74
VIEW 3

4

BLK

See Ground
Distribution,
page 14-4
or 14-8.

BLK

BLK

Ground

C412

PHOTO 110
VIEW 96

4

BLK

BLK

BLK

A

8

’96-’97

HOT AT ALL TIMES

See
Power
Door
Locks

BLU/WHT

’04

2004 American Honda Motor Co., Inc.

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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

PHOTO 79

VIEW 114

See Ground
Distribution,
page 14-8 or 14-10.

C

4

UNDER-
HOOD
FUSE/
RELAY
BOX

PHOTO 33

FUSE 55

METER
15A

Ignition
input

RED/BLU

13

Driver’s
seat
belt
switch
input

See
Headlight
Switch

RED/GRN

UNDER-
DASH
FUSE/
RELAY
BOX

PHOTO 75

GAUGE RELAY

PHOTO 27

See Power Distribution,
page 10-10.

FUSE 13

METER (’96-’98)
METER
SUN ROOF
(’99-’04)
7.5A

See Power
Distribution,
page 10-10.

YEL

YEL

2

(

*

3)

5

2

C307

PHOTO 37
VIEW 47

1

RED/YEL

UNDER-HOOD
RELAY
BOX C

PHOTO 23

BLK

3

)

(

*

5)

WHT/RED

1

G301

PHOTO 31

See Ground
Distribution,
page 14-6.

Lights-on
input

RED/GRN

C415

PHOTO 81
VIEW 77

6

RED/GRN

See Gauge Assembly,
page 80, 80-5 or 80-9.

WHT/RED

2

RED/BLU

C504

PHOTO 83
VIEW 68

12

RED/BLU

DRIVER’S
SEAT
BELT
SWITCH
Shown with
seat belt
unbuckled.

RED/BLU

C660

PHOTO 125

3

BLU/RED

See Seat Belt
Tension Control

G651

PHOTO 133

C660

PHOTO 125

1

BLK

A

13

C331

PHOTO 75
VIEW 66

9

7

)

(Canada 4)

HEAD

OFF

AUTO

PARK

See Headlights

Headlight
Switch

COMBINATION
LIGHT
SWITCH

VIEW 116

BLK

BLK

RED/BLK

See Ground
Distribution,
page 14-16.

BLK

RED/BLU

BLU/RED

FUSE 48

SMALL LIGHT
7.5A

C306

PHOTO 36
VIEW 36

3

RED/BLK

G401

PHOTO 79

BLK

BLK

B

*

= ‘96-’97

TAIL-
LIGHT
RELAY

PHOTO 162

UNDER-

HOOD

RELAY

BOX C

PHOTO 23

2

1

‘96-‘98

‘99-’04

G401

PHOTO 79

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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