Acura CSX. Instruction — page 18

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SNR9A00A26100034101KDAT01

01

SNR9A00A26100055901MAAT02

4-21

4-21

Ignition Coil Removal/Installation

Spark Plug Inspection

A

B

C

6 x 1.0 mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)

6 x 1.0 mm
12 N·m
(1.2 kgf·m,
8.7 lbf·ft)

• Improper gap
• Oil-fouling
• Carbon deposits
• Cracked center

electrode insulator

Worn or deformed
electrodes

Damaged
gasket

Cracked
insulator

1. Remove the ignition coil cover (A).

2. Disconnect the ignition coil connectors (B), then

remove the ignition coils (C).

3. Install the ignition coils in the reverse order of

removal.

1. Remove the spark plugs, then inspect the

electrodes and the ceramic insulator.

• Burned or worn electrodes may be caused by

these conditions:
– Advanced ignition timing
– Loose spark plug
– Plug heat range too hot
– Insufficient cooling

• Fouled plugs may be caused by these conditions:

– Retarded ignition timing
– Oil in combustion chamber
– Incorrect spark plug gap
– Plug heat range too cold
– Excessive idling/low speed running
– Clogged air cleaner element
– Deteriorated ignition coils

2. If the spark plug electrode is dirty or contaminated,

clean the electrode with a plug cleaner.

NOTE:

• Do not use a wire brush or scrape the iridium

electrode since this will damage the electrode.

• When using a sand blaster spark plug cleaner, do

not clean for more than 20 seconds to avoid
damaging the electrode.

02

Spark Plugs
K20Z2 engine
DENSO: SKJ20DR-M11
K20Z3 engine
DENSO: SK22PR-M11S
Electrode Gap
Standard(New): 1.0

1.1 mm (0.039

0.043 in.)

4-22

Ignition System

B

A

3. Replace the plug at the specified interval or if the

center electrode (A) is rounded, or if the spark plug
gap (B) is out of specification. Use only the listed
spark plugs.

NOTE: Do not adjust the gap of iridium tip plugs.

4. Apply a small amount of anti-seize compound to

the plug threads, and screw the plugs into the
cylinder head, finger-tight. Torque them to 18 N·m
(1.8 kgf·m, 13 lbf·ft).

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4-23

Charging System

Component Location Index

BATTERY

DRIVE BELT

CHARGING SYSTEM INDICATOR
(In the gauge control module (tach))

UNDER-HOOD FUSE/RELAY BOX
(Has built-in ELECTRICAL LOAD
DETECTOR (ELD))

ALTERNATOR

DRIVE BELT AUTO-TENSIONER

IDLER PULLEY

Test, page 22-67

Inspection, page 4-30
Replacement, page 4-31

Removal and Installation, page 4-34
Overhaul, page 4-38

Inspection, page 4-31
Removal/Installation, page 4-32
Tensioner Pulley Replacement,

page 4-33

Replacement,

page 4-34

SNR9A00A14100000000HBAT01

Symptom

Diagnostic procedure

Also check for

4-24

Charging System

Symptom Troubleshooting Index

Charging system
indicator does not come
on with the ignition
switch in ON (II)

Troubleshoot the charging system indicator circuit
(see page 4-26).

Charging system
indicator stays on

1.

2.
3.
4.

Troubleshoot the charging system indicator circuit
(see page 4-26).
Check for a broken drive belt (see page 4-30).
Check the drive belt auto-tensioner (see page 4-31).
Check for PGM-FI DTCs (see page 11-3).

Battery discharged

1.
2.
3.
4.

5.
6.

Check for a poor connection at the battery terminal.
Check for a broken drive belt (see page 4-30).
Test the battery (see page 22-67).
Troubleshoot the alternator and regulator circuit
(see page 4-28).
Check the drive belt auto-tensioner (see page 4-31).
Check for excessive parasitic electrical current draw
with the ignition switch to LOCK (0), and the key
removed. The multiplex control unit may take up to 10
minutes to turn off (sleep mode) for same models.

Battery overcharged

1.
2.

Test the battery (see page 22-67).
Troubleshoot the alternator and regulator circuit
(see page 4-28).

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