Acura CSX. Instruction — page 64

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K20Z2 engine

8-3

Component Location Index

OIL PRESSURE SWITCH

OIL FILTER

OIL PUMP

DRAIN BOLT

O-RING

OIL PAN

BAFFLE PLATE

OIL CONTROL ORIFICE

OIL PUMP CHAIN GUIDE

CRANKSHAFT SPROCKET

OIL PUMP CHAIN TENSIONER

BAFFLE PLATE

OIL FILTER FEED PIPE

WASHER

Circuit Diagram, page 8-6
Test, page 8-9
Replacement, page 8-9
Oil Pressure Test, page 8-10

Replacement, page 8-11

Overhaul, page 8-15

Removal, page 7-11
Installation, page 7-29

Replacement, page 8-12

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K20Z3 engine

8-4

Engine Lubrication

OIL PRESSURE SWITCH

OIL FILTER

OIL PUMP

DRAIN BOLT

O-RING

OIL PAN

BAFFLE PLATE

OIL CONTROL ORIFICE

OIL PUMP CHAIN GUIDE

CRANKSHAFT SPROCKET

OIL PUMP CHAIN TENSIONER

BAFFLE PLATE

OIL COOLER

WASHER

OIL COOLER CENTER BOLT

OIL JETS

Circuit Diagram, page 8-6
Test, page 8-9
Replacement, page 8-9
Oil Pressure Test, page 8-10

Replacement, page 8-11

Overhaul, page 8-15

Removal, page 7-11
Installation, page 7-29

Replacement, page 8-13

Inspection, page 8-14

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Symptom

Diagnostic procedure

Also check for

8-5

Symptom Troubleshooting Index

Excessive engine oil
consumption

1.

2.
3.

4.

5.

Verify that the engine oil filler cap, the oil drain
bolt, and the oil filter are tight.
Check for oil leaks.
Check for worn valve guide(s) (see page 6-55) or
worn valve stem seal(s) (see page 6-54).
Check for damaged or worn piston ring(s)
(see page 7-21).
Check for damaged or worn engine internal parts
(cylinder wall, pistons, etc.) (see page 7-16).

Low oil pressure indicator does
not come on with the ignition
switch in ON (II)

1.

2.

Do the low oil pressure indicator circuit
troubleshooting (Open) (see page 8-7).
Test the oil pressure switch (see page 8-9).

An open in the wire
between the engine
control module (ECM)/
powertrain control
module (PCM) and the
oil pressure switch

Low oil pressure indicator stays
on

1.
2.

3.
4.
5.
6.
7.
8.

Check the engine oil level.
Do the low oil pressure indicator circuit
troubleshooting (Short) (see page 8-8).
Test the oil pressure switch (see page 8-9).
Check the engine oil pressure (see page 8-10).
Check the oil filter for clogging.
Check the oil screen for clogging.
Check the relief valve (see page 8-15).
Test the oil pump (see page 8-17).

A wire shorted to
ground between the
ECM/PCM and the oil
pressure switch

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8-6

Engine Lubrication

Low Oil Pressure Indicator Circuit Diagram

D2

Q9

H1

19

1

17

3

6

B7

CANL

CANH

DRIVER

BRN

12 V

5 V

GAUGE CONTROL MODULE (TACH)

IGNITION SWITCH

BAT

IG1

ECM/PCM

OPSW

A37

A36

RED

WHT

CPU

No. 2 (50 A)

No. 10
(7.5 A)

BATTERY

UNDER-HOOD FUSE/RELAY BOX

No. 1 (100 A)

YEL/RED

UNDER-DASH
FUSE/RELAY BOX

LOW OIL
PRESSURE
INDICATOR

OIL PRESSURE SWITCH
(Closed: Lost pressure)

IG1 HOT in ON (II)
and START (III)

1

WHT

BLU

CANH

CANL

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