ignition ACURA CSX 2006 Service User Guide

Î
(#'
)
4-19
Circuit Diagram
ICM
ICM ICM
ICM: Ignition Conotrol Module BLK BLK BLK
ICM
BLK/WHT BLK/WHT BLK/WHT BLK/WHT
5V
BLU
ECM/PCM
IGPLS4 IGPLS3 IGPLS2 IGPLS1 MRLY BLK/WHT
2 3
1 UNDER-HOOD FUSE/RELAY BOX
1
3 2
4
No. 18 (15 A)
GRN
No. 4 WHT/BLU
No. 3 No. 2 BLU/RED
BATTERY
YEL/GRN
BLK No. 1
BRN
G101G101 IGNITION
COIL
RELAY
IGNITION
COILS
SPARK
PLUGS E7
F9
C18 C17 C16 C15 A6
13 3
1
3
1
2
2
2 23
16
C101
08/08/21 14:09:30 61SNR030_040_0020
ProCarManuals.com
DYNOMITE -2009-



(#'
") ¶
¶
Ignition Timing
M/T model: 8 ° 2 ° BTDC (RED mark (B)) at
idle in neutral
A/T model: 8 ° 2 ° BTDC (RED mark (B)) at idle in N or P
4-20Ignition System
Ignition Timing Inspection
A
B
1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3).
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
4. Check for DTCs (see page 11-3). If a DTC is present, diagnose and repair the cause before continuing
with this test.
5. Start the engine. Hold the engine speed at 3,000 rpm with no load (in N or P (A/T model) or
neutral (M/T model)) until the radiator fan comes
on, then let it idle.
6. Check the idle speed (see page 11-309).
7. Jump the SCS line with the HDS.
8. Connect the timing light to the service loop (white tape). 9. Aim the light toward the pointer (A) on the cam
chain case. Check the ignition timing under a no
load condition (headlights, blower fan, rear window
defogger, and air conditioner are turned off).
10. If the ignition timing differs from the specification, check the cam timing. If the cam timing is OK,
update the ECM/PCM if it does not have the latest
software (see page 11-227), or substitute a known-
good ECM/PCM (see page 11-7), then recheck. If the
system work properly, and the ECM/PCM was
substituted, replace the original ECM/PCM
(see page 11-228).
11. Disconnect the HDS and the timing light.
08/08/21 14:10:07 61SNR030_040_0021
ProCarManuals.com
DYNOMITE -2009-

Î
(#'


 )

(#'

")
4-214-21
Ignition Coil Removal/Installation Spark Plug Inspection
A B
C 6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
12 N·m
(1.2 kgf·m,
8.7 lbf·ft) Impropergap
 Oil-fouling
 Carbon deposits
 Cracked centerelectrode 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.
(cont’d)
08/08/21 14:10:07 61SNR030_040_0022
ProCarManuals.com
DYNOMITE -2009-

µµ
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
Spark Plug Inspection (cont’d)
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).
08/08/21 14:10:07 61SNR030_040_0023
ProCarManuals.com
DYNOMITE -2009-

(#'

)
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).
08/08/21 14:10:10 61SNR030_040_0025
ProCarManuals.com
DYNOMITE -2009-

Î
(#'

)
4-25
Circuit Diagram
6
3
191 F5
17 D2
A3
A2 H1
ELD
CANL
CANH
ALTF ALTC ALTL
5V
ALTERNATOR DRIVER
YEL
FR L C IG BRN
ELD
A23 GAUGE CONTROL MODULE (TACH)
IGNITION SWITCH
BATIG1
B43 B42 B41 A37
A36 RED
WHT CPU
YEL
1
BLK/YEL
No. 2 (50 A)
BLK
RECTIFIER
BATTERY
VOLTAGE REGULATOR2
3
4
B
BLK
G301
UNDER-HOOD FUSE/RELAY BOX
No. 1 (100 A)
ORN
WHT/RED WHT/GRNWHT/BLU UNDER-DASH
FUSE/RELAY BOX
CHARGING
SYSTEM
INDICATOR
IG1 HOT in ON (II)
and START (III)
A1
ECM/PCM BLU
Q9
WHT
22
17C101
CANH
CANL
YEL
No. 10
(7.5 A)
No. 3
(10 A)
08/08/21 14:10:10 61SNR030_040_0026
ProCarManuals.com
DYNOMITE -2009-


(#'


)
µ
µ
µ
µ
µ
µ
µ
µ µ
µ
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
4-26Charging System
Charging System Indicator Circuit Troubleshooting
ALT L
(WHT/BLU)
ECM/PCM CONNECTOR B (44P)
NOTE: Check for stored DTCs in the PGM-FI before
troubleshooting the charging system indicator.
1. Turn the ignition switch to ON (II).
Go to step 2.
Go to step 14.
2. Start the engine. Hold the engine speed at 2,000 rpm for 1 minute.
Charging system indicator circuit is OK. Go
to the alternator and regulator circuit
troubleshooting (see page 4-28).
Go to step 3.
3. Do the gauge control module self-diagnostic function procedure (see page 22-241).
Go to step 4.
Replace the gauge control module (tach)
(see page 22-277).
4. Turn the ignition switch to LOCK (0).
5. Disconnect the alternator 4P connector.
6. Turn the ignition switch to ON (II).
Replace the alternator (see page 4-34), or
repair the alternator (see page 4-38).
Go to step 7. 7. Turn the ignition switch to LOCK (0).
8. Connect the Honda Diagnostic System (HDS) to the
data link connector (DLC) (see step 2 on page 11-3).
9. Turn the ignition switch to ON (II).
10. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
11. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCMfromdamage.
12. Disconnect ECM/PCM connector B (44P).
13. Check for continuity between ECM/PCM connector terminal B42 and body ground.
Repair short to ground in the wire between
alternator 4P connector terminal No. 3 and ECM/
PCM connector terminal B42.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).
Terminal side of female terminals
Does t he char gi ng sy st em i nd i cat or come on?
Does t he char gi ng sy st em i nd i cat or go of f ?
Does t he char gi ng sy st em i nd i cat or f l ash?
Does t he char gi ng sy st em i nd i cat or go of f ? Is there continuity?
08/08/21 14:10:11 61SNR030_040_0027
ProCarManuals.com
DYNOMITE -2009-

Î
Î
µ
µ
µ
µ µ
µ
YES
NO
YES
NO
YES
NO
4-27
ALTERNATOR 4P CONNECTOR
L
(WHT/BLU) JUMPER
WIER
ALT L
(WHT/BLU)
ECM/PCM CONNECTOR B (44P)
L
(WHT/BLU)
ALTERNATOR
4P CONNECTOR
14. Do the gauge control module self-diagnostic function procedure (see page 22-241).
Go to step 15.
Replace the gauge control module (tach)
(see page 22-277).
15. Turn the ignition switch to LOCK (0).
16. Disconnect the alternator 4P connector.
17. Connect alternator 4P connector terminal No. 3 and body ground with a jumper wire.
18. Turn the ignition switch to ON (II). Replace the alternator (see page 4-34), or
repair the alternator (see page 4-38).
Disconnect the jumper wire, then go to step
19.
19. Turn the ignition switch to LOCK (0). 20. Connect the HDS to the DLC (see step 2 on page
11-3).
21. Turn the ignition switch to ON (II).
22. Make sure the HDS communicates with the vehicle and the ECM/PCM. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
23. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCMfromdamage.
24. Disconnect ECM/PCM connector B (44P).
25. Check for continuity between ECM/PCM connector terminal B42 and alternator 4P connector terminal
No. 3.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).
Repair open in the wire between alternator 4P
connector terminal No. 3 and ECM/PCM connector
terminal B42.
Wire side of female terminals Terminal side of female terminals
Wire side of
female terminals
Does t he char gi ng sy st em i nd i cat or f l ash?
Does t he char gi ng sy st em i nd i cat or come on? Is there continuity?
08/08/21 14:10:11 61SNR030_040_0028
ProCarManuals.com
DYNOMITE -2009-



(#'


)
µ
µ µ
µ
YES
NO YES
NO
4-29
Alternator Control Circuit Troubleshooting
BATTERY
ALTERNATOR
4P CONNECTOR C (WHT/GRN) ALT C
(WHT/GRN)
ECM/PCM CONNECTOR B (44P)
1. Connect the Honda Diagnostic System (HDS) to the
data link connector (DLC) (see step 2 on page 11-3).
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
4. Check for DTCs (see page 11-3). If a DTC is present, diagnose and repair the cause before continuing
with this test.
5. Disconnect the alternator 4P connector.
6. Start the engine, and turn on the headlights to high beam.
7. Measure the voltage between alternator 4P connector terminal No. 2 and the positive terminal
of the battery.
Go to step 11.
Go to step 8.
8. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCM from damage.
9. Disconnect ECM/PCM connector B (44P). 10. Check for continuity between ECM/PCM connector
terminal B41 and body ground.
Repair short to ground in the wire between
alternator 4P connector terminal No. 2 and ECM/
PCM connector terminal B41.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).
11. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCMfromdamage.
12. Disconnect ECM/PCM connector B (44P).
(cont’d)
Wire side of
female terminals Terminal side of female terminals
Is t her e 1 V or l ess?
Is there continuity?
08/08/21 14:10:12 61SNR030_040_0030
ProCarManuals.com
DYNOMITE -2009-

Î
(#'


 )


(#'

")
Special Tools Required
Special Tools Required
4-314-31
Drive Belt ReplacementDrive Belt Auto-tensioner
Inspection
YA9317
A B
A
YA9317
Belt tension release tool Snap-on YA9317 or equivalent,
commercially available
1. Move the auto-tensioner (A) using the belt tension release tool to relieve tension from the drive belt
(B), then remove the drive belt.
2. Install the new drive belt in the reverse order of removal. Belt tension release tool Snap-on YA9317 or equivalent,
commercially available
1. Turn the ignition switch to ON (II), and make sure the A/C switch is OFF, then turn the ignition switch
to LOCK (0).
2. Check the position of the auto-tensioner indicator’s pointer (A). Start the engine then check the position
again with the engine idling. If the position of the
indicator moves or fluctuates very much, replace
the auto-tensioner (see page 4-32).
3. Check for abnormal noise from the tensioner pulley. If you hear abnormal noise, replace the tensioner
pulley(seepage4-33).
4. Remove the drive belt (see page 4-31).
5. Move the auto-tensioner within its limit using the belt tension release tool in the direction shown.
Check that the tensioner moves smoothly and
without any abnormal noise. If the tensioner does
not move smoothly, or you hear abnormal noise,
replace the auto-tensioner (see page 4-32).
(cont’d)
08/08/21 14:10:13 61SNR030_040_0032
ProCarManuals.com
DYNOMITE -2009-