Engine air ACURA CSX 2006 Service Repair Manual


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K20Z2 engine
11-34611-346 Intake Air System
Air Cleaner Element Inspection/
Replacement
Intake Air Resonator Removal/
Installation
A
B
C
D
E B
C
A
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
1. Open the air cleaner housing cover (A).
2. Remove the air cleaner element (B) from the air
cleaner housing (C).
3. Check the air cleaner element for damage or clogging. If it is damaged or clogged, replace it.
NOTE: Do not use compressed air to clean the air
cleaner element.
4. Clean and remove any debris from inside the air cleaner housing.
5. Install the parts in the reverse order of removal.  If you did not replace the air cleaner element, thisprocedure is complete.
 If the maintenance minder required air cleaner element replacement, reset the maintenance
minder(seepage3-7).
 If you replaced the air cleaner element, reset the ECM/PCM (see page 11-4), and do the ECM/PCM
idle learn procedure (see page 11-310). 1. Remove the front bumper (see page 20-146).
2. Remove the bolts (A), and pipe (B).
3. Remove the intake air resonator (C).
4. Do the battery removal procedure (see page 22-69).
5. Remove the bolt (D), and duct (E).
6. Install the parts in the reverse order of removal.
7. Do the battery installation procedure (see page
22-69).
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K20Z3 engine
11-347
D
E B
C
A
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
1. Remove the front bumper (see page 20-146).
2. Remove the bolts (A), and pipe (B).
3. Remove the intake air resonator (C).
4. Do the battery removal procedure (see page 22-69).
5. Remove the bolt (D), and duct (E).
6. Install the parts in the reverse order of removal.
7. Do the battery installation procedure (see page
22-69).
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K20Z2 engine
11-348Intake Air System
Throttle Body Removal/Installation
A
B
C
D
F E
22 N·m
(2.2 kgf·m, 16 lbf·ft)
Do not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the
ignition switch is ON (II). If you do, there will be serious injury to your fingers if the throttle valve is activated.
NOTE: If you are replacing or cleaning the throttle body, start at step 1. If you are removing the throttle body, start at
step 4. 1. Connect the HDS to the DLC while the engine is stopped.
2. Select the INSPECTION MENU with the HDS.
3. Do the TP POSITION CHECK in the ETCS TEST.
4. Turn the ignition switch to LOCK (0).
5. Remove the intake air duct (A).
6. Disconnect the throttle body connector (B).
7. Disconnect the water bypass hoses (C), and plug them.
8. Disconnect the vacuum hose (D).
9. Remove the throttle body (E).
10. Install the parts in the reverse order of removal with a new gasket (F), then do these:  Refill the radiator with engine coolant (see page 10-8).
 Do the ECM/PCM idle learn procedure (see page 11-310).
08/08/21 14:31:10 61SNR030_110_0348
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K20Z3 engine
11-349
22 N·m
(2.2 kgf·m, 16 lbf·ft)A
B
C D
E F
D
G
Do not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the
ignition switch is ON (II). If you do, there will be serious injury to your fingers if the throttle valve is activated.
NOTE: If you are replacing or cleaning the throttle body, start at step 1. If you are removing the throttle body, start at
step 4. 1. Connect the HDS to the DLC while the engine is stopped.
2. Select the INSPECTION MENU with the HDS.
3. Do the TP POSITION CHECK in the ETCS TEST.
4. Turn the ignition switch to LOCK (0).
5. Remove the intake air duct (A).
6. Disconnect the throttle body connector (B).
7. Disconnect the water bypass hoses (C), and plug them.
8. Disconnect the vacuum hoses (D) and the clamp (E).
9. Remove the throttle body (F).
10. Install the parts in the reverse order of removal with a new gasket (G), then do these:  Refill the radiator with engine coolant (see page 10-8).
 Do the ECM idle learn procedure (see page 11-310).
08/08/21 14:31:11 61SNR030_110_0349
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11-351
Intake Air Bypass Control Thermal Valve Replacement
B
15 N·m
(1.5 kgf·m, 11 lbf·ft)90 °
A
A
30 °Front
Front 30 °
D C
1. Remove the engine cover (see step 1 on page 9-3).
2. Remove the intake air duct.
 K20Z2 engine (see page 11-348)
 K20Z3 engine (see page 11-349)
3. Disconnect the hoses (A).
4. Remove the intake air bypass control thermal valve (B).
5. Install the parts in the reverse order of removal.
NOTE: Position the valve angle as shown.
 Make sure the center of clamp (C) and the lever end of clamp (D) are the position within the range
shown.
* : This illustration shows K20Z2 engine.
08/08/21 14:31:11 61SNR030_110_0351
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NO
YES
NO YES
NO
11-367
ECM/PCM CONNECTOR B (44P)
EGR (BLU/RED) EGR VALVE 6P CONNECTOR
EGR (BLU/RED)
EGR VALVE 6P CONNECTOR PG2 (BLK/RED)(BLK) *
*: ’07-09 models EGR
PG2
EGR VALVE 6P CONNECTOR
JUMPER WIRE
BATTERY
28. Check for continuity between ECM/PCM connector terminal B2 and EGR valve 6P connector terminal
No. 4.
Go to step 29.
Repair open in the wire between the ECM/
PCM (B2) and the EGR valve, then go to step 44.
29. Check for continuity between EGR valve 6P connector terminal No. 6 and body ground.
Go to step 30.
Repair open in the wire between the EGR
valve and G101; A/T model (see page 22-16), M/T
model (see page 22-18), then go to step 44. 30. Reconnect ECM/PCM connector B (44P).
31. Connect the battery positive terminal to EGR valve
6P connector terminal No. 4 with a jumper wire.
32. Start the engine, and let it idle. Then connect the battery negative terminal to EGR valve 6P
connector terminal No. 6 with a jumper wire.
Go to step 51.
Go to step 33.
(cont’d)
Wire side of
female terminals
Terminal side of female terminals
Wire side of female terminals Terminal side of male terminals
Is there continuity?
Is there continuity? Does t he engi ne st al l or r un r ough?
08/08/21 14:32:26 61SNR030_110_0367
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NO
YES
NO
11-387
AD
B C
D A
B
6. Turn the ignition switch to LOCK (0).
7. Check for a poor connection or damage at the fuel
tank vapor recirculation tube.
Go to step 8.
 Replace the fuel tank vapor recirculation tube, then go to step 29.
 If needed, replace the fuel tank (see page 11-339), then go to step 29.
8. Disconnect the fuel tank vapor recirculation tube (A) and the fresh air hose (B) from the EVAP
canister (C), and plug the EVAP canister ports (D). 9. Disconnect the vacuum hose (engine side) (A) from
the EVAP canister purge valve (B) in the engine
compartment, and connect a vacuum pump/gauge,
0 30 in.Hg, to the purge valve as shown.
10. Turn the ignition switch ON (II).
11. Select EVAP PCS ON in the INSPECTION MENU with the HDS.
12. Apply vacuum to the hose until the FTP reads 1.90 V ( 15.1 mmHg, 0.59 in.Hg).
NOTE: Be careful not to exceed the vacuum. If you
do, the FTP sensor can be damaged.
13. Select EVAP PCS OFF in the INSPECTION MENU with the HDS.
14. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.
Go to step 15.
Go to step 22.
(cont’d)
*: This illustration shows K20Z2 engine.
IsthetubeOK?
Does the voltage increase more than 0.2 V( 0.5 mmH g, 0.1 i n.H g)?
08/08/21 14:32:37 61SNR030_110_0387
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11-388
EVAP System
DTC Troubleshooting (cont’d)
A
B
C
A B
15. Turn the ignition switch to LOCK (0).
16. Disconnect the vacuum pump/gauge from the
EVAP canister purge valve.
17. Reconnect the vacuum hose (engine side) (A) to the EVAP canister purge valve (B) and disconnect the
vacuum hose (EVAP canister side) (C) from the
EVAP canister purge valve, then connect a vacuum
pump/gauge 0 30 in.Hg, to the vacuum hose as
shown.
18. Turn the ignition switch to ON (II).
19. Apply vacuum to the hose until the FTP reads 1.90 V ( 15.1 mmHg, 0.59 in.Hg).
NOTE: Be careful not to exceed the vacuum. If you
do, the FTP sensor can be damaged.
20. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.
Go to step 21.
Replace the EVAP canister purge valve
(see page 11-409), then go to step 29. 21. Check for a loose or damaged EVAP canister purge
line between the EVAP canister and the EVAP
canister purge valve or a leaking the EVAP canister.
Replace these parts, then go to step 29:
 FTP sensor O-ring
 EVAP canister vent shut valve case and O-ring
EVAPcanister Reconnect or repair the EVAP canister purge
line, then go to step 29.
22. Reconnect the fresh air hose (A) to the EVAP canister (B).
*: This illustration shows K20Z2 engine.
Does the voltage increase more than 0.2 V( 2.5 mmH g, 0.1 i n.H g)? Ar e t he l i ne and t he E V AP cani st er OK ?
08/08/21 14:32:37 61SNR030_110_0388
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11-389
A
B
C
23. Reconnect the vacuum hose (engine side) (A) to theEVAP canister purge valve (B) and disconnect the
vacuum hose (EVAP canister side) (C) from the
EVAP canister purge valve, then connect a vacuum
pump/gauge 0 30 in.Hg, to the vacuum hose as
shown.
24. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
25. Apply vacuum to the EVAP system until the FTP reads 1.90 V ( 0.59 in.Hg, 15.1 mmHg).
NOTE: Be careful not to exceed the vacuum. If you
do, the FTP sensor can be damaged.
26. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.
Replace the EVAP canister vent shut valve
(see page 11-409), then go to step 29.
Go to step 27.
27. Select EVAP CVS OFF in the INSPECTION MENU. 28. Check these parts for looseness or damage:
 Fuel fill pipe
 Fuel vapor return pipe
Check the fuel tank unit base gasket
(see page 11-335), and check the fuel tank, then go
to step 29.
Repair or replace the damaged parts, then go
to step 29.
29. Reconnect all hoses and connectors.
30. Turn the ignition switch to ON (II).
31. Reset the ECM/PCM with the HDS.
32. Do the ECM/PCM idle learn procedure (see page 11-310).
33. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Check for poor connections or loose terminals
at the FTP sensor, the EVAP canister purge valve,
the EVAP canister vent shut valve, and the ECM/
PCM, then go to step 1.
*: This illustration shows K20Z2 engine.
Does the voltage increase more than 0.2 V ( 2.5 mmH g, 0.1 i n.H g)? Ar e t he par t s OK ?
Is the result OK ?
08/08/21 14:32:38 61SNR030_110_0389
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DTC P0497:
Special Tools Required
YES
NO
YES
NO
YES
NO YES
NO
11-392EVAP System
DTC Troubleshooting (cont’d)
A
C
07JAZ-001000B
B
EVAP System Low Purge Flow
Detected
 Vacuum/pressure gauge, 0 4 in.Hg, 07JAZ-001000B
 Vacuum pump/gauge, 0 30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3). 1. Check the fuel fill cap installation (The cap must say TIGHTEN TO CLICK. The cap should tighten 1/4 turn
after it is tight.).
Go to step 2.
Properly install the fuel fill cap, then go to
step 23.
2. Turn the ignition switch to ON (II).
3. Clear the DTC with the HDS.
4. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the FTP sensor, the EVAP canister purge valve,
the EVAP canister vent shut valve, and the ECM/
PCM.
Go to step 5.
5. Check for a loose or damaged EVAP canister purge line between the intake manifold and the EVAP
canister purge valve.
Go to step 6.
Reconnect or repair the EVAP canister purge
line, then go to step 23. 6. Disconnect the vacuum hose (A) from the EVAP
canister purge valve (B) in the engine compartment,
and connect a T-fitting (C) between the vacuum
gauge, the vacuum pump/gauge, 0 30 in.Hg, and
the vacuum hose as shown.
7. Select EVAP PCS ON in the INSPECTION MENU with the HDS.
8. Slowly apply about 2 kPa (15 mmHg, 0.6 in.Hg) of vacuum to the hose.
Replace the EVAP canister purge valve, then
go to step 22.
Go to step 9.
Is the f uel f ill cap installed and properlytightened?
Is the result OK ?Is the line OK ? Does i t hol d v acuum?
08/08/21 14:33:20 61SNR030_110_0392
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