engine ACURA CSX 2006 Service Repair Manual




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With the HDS
11-322 Fuel Supply System
Fuel Pressure Relieving
A
A
A
Before disconnecting fuel lines or hoses, relieve
pressure from the system by disabling the fuel pump
and then disconnecting the fuel tube/quick connect
fitting in the engine compartment. 1. Turn the ignition switch to LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A) located under the driver’s side of the dashboard.
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the ECM/ PCM. If it doesn’t, go to the DLC circuit
troubleshooting (see page 11- 204).
5. Turn the ignition switch to LOCK (0).
6. Remove the fuel fill cap to relieve the pressure in the fuel tank.
7. Turn the ignition switch to ON (II).
8. From the INSPECTION MENU of the HDS, select Fuel Pump OFF, then start the engine, and let it idle
until it stalls.
NOTE: Do not allow the engine to idle above 1,000 rpm or the ECM/PCM will continue to operate the fuel
pump.
 A DTC or a Temporary DTC may be set during this procedure. Check for DTCs, and clear them
as needed (see page 11-4). 9. Turn the ignition switch to LOCK (0).
10. Do the battery terminal disconnection procedure (see page 22-68).
11. Remove the quick-connect fitting cover (A).
12. Check the fuel quick-connect fitting for dirt, and clean it if needed.
13. Place a rag or shop towel over the quick-connect fitting (A).
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Without the HDS
11-323
A
B C
E
D
A
14. Disconnect the quick-connect fitting (A): Hold the
connector (B) with one hand, and squeeze the
retainer tabs (C) with the other hand to release
them from the locking tabs (D). Pull the connector
off.
NOTE: Be careful not to damage the line (E) or other parts.
 Do not use tools.
 If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push
the connector until it comes off easily.
 Do not remove the retainer from the line; once removed, the retainer must be replaced with a
new one.
15. After disconnecting the quick-connect fitting, check it for dirt or damage (see step 4 on page 11-330).
16. Do the battery terminal reconnection procedure (see page 22-68). 1. Remove the under-dash fuse/relay box (see page
22-66), then remove PGM-Fl main relay 2 (FUEL
PUMP) (A) from the under-dash fuse/relay box.
2. Reinstall the under-dash fuse/relay box.
3. Start the engine, and let it idle until it stalls. NOTE: If any DTCs are stored, clear and ignore
them.
4. Turn the ignition switch to LOCK (0).
5. Remove the fuel fill cap.
6. Do the battery terminal disconnection procedure (see page 22-68).
(cont’d)
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 Special Tools Required
11-32511-325
Fuel Pressure Test Fuel Tank Draining
07406-004000B
07AAJ-S6MA150
 Fuel pressure gauge 07406-004000B
 Fuel pressure gauge attachment set 07AAJ-S6MA150 1. Relieve the fuel pressure (see page 11-322).
2. Disconnect the quick-connect fitting. Attach the fuel pressure gauge set and the fuel pressure gauge.
3. Start the engine, and let it idle.  If the engine starts, go to step 5.
 If the engine does not start, go to step 4.
4. Check to see if the fuel pump is running: Listen to the fuel filler port with the fuel fill cap removed.
The fuel pump should run for 2 seconds when the
ignition switch is first turned on.
 If the pump runs, go to step 5.
 If the pump does not run, do the fuel pump circuit troubleshooting (see page 11- 318).
5. Read the fuel pressure gauge. The pressure should be 330 380 kPa (3.4 3.9 kgf/cm , 48 55 psi).
 If the pressure is OK, the test is complete.
 If the pressure is out of specification, replace the fuel pressure regulator (see page 11-337) and the
fuel filter (see page 11-337), then recheck the fuel
pressure. 1. Remove the fuel tank unit (see page 11-334).
2. Using a hand pump, a hose, and a container
suitable for fuel, draw the fuel from the fuel tank.
3. Reinstall the fuel tank unit (see page 11-335).
2
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colorLine
diameter
Manufacturer
11-328 Fuel Supply System
Fuel Line/Quick-Connect Fitting Precautions
A
B
F H
I
G A
C
J
K
D
M L
E O
N
The fuel line/quick-connect fittings (A), (B), (C), (D), and
(E) connect the fuel rail (F) to fuel feed hose A (G), fuel
feed hose A to fuel feed hose B (H), fuel feed hose B to
the fuel line (I), the fuel line (J) to the fuel tank unit (K),
the fuel vapor line (L) to the EVAP canister (M) and the
fuel tank vapor recirculation tube (N) to the fuel fill pipe
(O). When removing or installing the fuel feed hose, the
fuel tank unit, or the fuel tank, you need to disconnect
or connect the quick-connect fittings.
Pay attention to the following:  The fuel feed hoses, the fuel line, and the quick- connect fittings are not heat-resistant; be careful not
to damage them during welding or other heat-
generating procedures.
 The fuel feed hoses, the fuel line, and the quick- connect fittings are not acid-proof; do not touch them
with a shop towel that was used for wiping battery
electrolyte. Replace them if they come in contact with
electrolyte or something similar.
 When connecting or disconnecting the fuel feed hoses, the fuel line, and the quick-connect fittings, be
careful not to bend or twist them excessively. Replace
them if they are damaged.
A disconnected quick-connect fitting can be
reconnected, but the retainer on the mating line cannot
be reused once it has been removed from the line.
Replace the retainer when: replacing the fuel rail.
 replacing the fuel line.
 replacing the fuel pump.
 replacing the fuel filter.
 replacing the fuel gauge sending unit.
 replacing the EVAP purge line.
 replacing the EVAP canister.
 replacing the fuel tank.
 replacing the fuel fill pipe.
 it has been removed from the line.
 it is damaged.
A Tokai Green 6.3 mm (0.2 in.)
B Tokai Blue green8mm
(0.3 in.)
C Sanoh White 9.5 mm (0.4 in.)
D Sanoh White 12 mm (0.5 in.)
E Tokai Natural 12 mm (0.5 in.)
* : This illustration shows K20Z2 engine.
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11-329
Fuel Line/Quick-Connect Fitting Removal
A
AA
A AA
A B
D
C
NOTE: Before you work on the fuel lines and fittings,
read the Fuel Line/Quick-Connect Fitting Precautions
(see page 11-328).
1. Relieve the fuel pressure (see page 11-322).
2. Check the fuel quick-connect fittings (A) for dirt, and clean them if needed.
3. Place a rag or shop towel over the quick-connectfitting. Hold the connector (A) with one hand, and
squeeze the retainer tabs (B) with the other hand to
release them from the locking tabs (C). Pull the
connector off.
NOTE: Be careful not to damage the line (D) or other parts.
 Do not use tools.
 If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push
the connector until it comes off easily.
 Do not remove the retainer from the line; once removed, the retainer must be replaced with a
new one.
(cont’d)
* : This illustration shows K20Z2 engine.
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11-331
Fuel Line/Quick-Connect Fitting Installation
A B
B A A
A
B
A
B
A
B
NOTE: Before you work on the fuel lines and fittings,
read the Fuel Line/Quick-Connect Fitting Precautions
(see page 11-328). 1. Check the contact area (A) of the line (B) for dirt or damage, and clean it if needed.
2. Insert a new retainer (A) into the connector (B) if the retainer is damaged, or after:
 replacing the fuel rail.
 replacing the fuel feed line.
 replacing the fuel pump.
 replacing the fuel filter.
 replacing the fuel gauge sending unit.
 replacing the EVAP purge pipe.
 replacing the EVAP canister.
 replacing the fuel tank.
 replacing the fuel fill pipe.
 removing the retainer from the line.
 Use the same manufacturer’s retainer and the same size when replacing the retainer (see page
11-328). 3. Before connecting a new fuel tube/quick-connect
fitting assembly (A), remove the old retainer (B)
from the mating line.
(cont’d)
* : This illustration shows K20Z2 engine.
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Connection with new retainer Reconnection to existing retainer
Connection to new fuel line
11-332Fuel Supply System
Fuel Line/Quick-Connect Fitting Installation (cont’d)
A
B A
C A
B
C
Sanoh-made
Tokai-made A
B
C C
4. Align the quick-connect fittings with the line (A),
and align the retainer locking tabs (B) with the
connector grooves (C). Then press the quick-
connect fittings onto the line until both retainer tabs
lock with a clicking sound.
NOTE: If it is hard to connect, put a small amount of
new engine oil on the line end.
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11-33711-337
Fuel Pressure Regulator
Replacement Fuel Filter Replacement
A
B
C
D A
D B
C D
B
1. Remove the fuel tank unit (see page 11-334).
2. Remove the bracket (A).
3. Remove the ground ring (B).
4. Remove the fuel pressure regulator (C).
5. Install the parts in the reverse order of removal with new O-rings (D) and a new bracket (A). When
installing the fuel tank unit, align the marks on the
unit and the fuel tank (see page 11-335).
NOTE: Coat the O-rings with clean engine oil; do
not use any other oil.
Do not pinch the O-rings during installation. The fuel filter should be replaced when
ever the fuel
pressure drops below the specified value (see page
11-325), after making sure that the fuel pump and the
fuel pressure regulator are OK.
1. Remove the fuel tank unit (see page 11-334).
2. Remove the fuel filter set (A).
3. Check these items before installing the fuel tank unit:
 When connecting the wire harness, make sure the connection is secure and the connectors (B)
are firmly locked into place.
 When installing the fuel gauge sending unit (C), make sure the connection is secure and the
connector is firmly locked into place. Be careful
not to bend or twist it excessively.
4. Install the parts in the reverse order of removal with new O-rings (D). When installing the fuel tank
unit, align the marks on the unit and the fuel tank
(see page 11-335).
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Î(#') K20Z2 engine:
K20Z3 engine:
11-342Intake Air System
Component Location Index
THROTTLE BODY
AIR CLEANER
INTAKE AIR RESONATOR
INTAKE AIR BYPASS CONTROL
THERMAL VALVE ENGINE CONTROL MODULE (ECM)/
POWERTRAIN CONTROL MODULE (PCM)
THROTTLE BODY AIR CLEANER
INTAKE AIR RESONATOR
INTAKE AIR BYPASS CONTROL
THERMAL VALVE ENGINE CONTROL MODULE (ECM)
Test, page 11-343
Cleaning, page 11-344
Removal/Installation, page 11-348
Disassembly/Reassembly, page 11-350 Removal/Installation, page 11-345
Element Inspection/Replacement,
page 11-346
Removal/Installation,page 11-346
Test, page 11-344
Replacement, page 11-351 Update, page 11-227
Substitution, page 11-7
Replacement, page 11-228
Test, page 11-343
Cleaning, page 11-344
Removal/Installation, page 11-348
Disassembly/Reassembly, page 11-350 Removal/Installation, page 11-345
Element Inspection/Replacement,
page 11-346
Removal/Installation,page 11-346
Test, page 11-344
Replacement, page 11-351 Update, page 11-227
Substitution, page 11-7
Replacement, page 11-228
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Carbon Accumulation Check Throttle Position Learning Check
11-343
Throttle Body Test
A A
NOTE: If the malfunction indicator lamp (MIL) has been
reported on, check for diagnostic trouble code (DTCs).
1. Connect the HDS to the data link connector (DLC) (A) located under the driver’s side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the ECM/ PCM. If it doesn’t, go to the DLC circuit
troubleshooting (see page 11- 204).
4. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
5. Check the REL TP SENSOR in the DATA LIST with the HDS. The reading should be below 2.46 deg. If it
is not, clean the throttle body (see page 11- 344).NOTE: If the malfunction indicator lamp (MIL) has been
reported on, check for diagnostic trouble code (DTCs).
1. Connect the HDS to the data link connector (DLC) (A) located under the driver’s side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the ECM/ PCM. If it doesn’t, go to the DLC circuit
troubleshooting (see page 11-204).
4. Select the INSPECTION MENU with the HDS.
5. Do the TP POSITION CHECK in the ETCS TEST. If needed, clean the throttle body (see page 11-344).
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