Engine air ACURA CSX 2006 Service Service Manual

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8-7
Low Oil Pressure Indicator Circuit Troubleshooting (Open)
ECM/PCM CONNECTOR B (44P)
OPSW
(YEL/RED)
OIL PRESSURE
SWITCH CONNECTOR
OPSW
(YEL/RED)
1. Connect the Honda Diagnostic System (HDS) to thedata 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. Check the OIL PRESSURE SWITCH in the PGM-FI DATA LIST with the HDS.
Replace the gauge control module (tach)
(see page 22-277).
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Check the oil pressure switch (see page 8-9).
Go to step 8.
Replace the oil pressure switch (see page 8-9).
8. Turn the ignition switch to ON (II), and 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) and the oil pressure switch connector. 10. Check for continuity between ECM/PCM connector
terminal B7 and the oil pressure switch connector.
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 an open in the wire between the oil
pressure switch and ECM/PCM connector terminal
B7.
Terminal side of female terminals
Wire side of
female terminal
Is ON indicated?
I s t he oi l pr essur e sw i t ch OK ? Is there continuity?
08/08/21 14:36:41 61SNR030_080_0007
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8-8Engine Lubrication
Low Oil Pressure Indicator Circuit Troubleshooting (Short)
OIL PRESSURE SWITCH CONNECTOR
OPSW
(YEL/RED)
1. Connect the Honda Diagnostic System (HDS) to thedata 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, and check the OIL PRESSURE SWITCH in the PGM-FI DATA LIST with the HDS.
Replace the gauge control module (tach)
(see page 22-277).
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Disconnect the oil pressure switch connector.
8. Start the engine, and check the OIL PRESSURE SWITCH in the PGM-FI DATA LIST with the HDS.
Turn the ignition switch to LOCK (0), then go
to step 9.
Turn the ignition switch to LOCK (0), then go
to step 10.
9. Check the oil pressure switch (see page 8-9).
Do the oil pressure test (see page 8-10).
Replace the oil pressure switch (see page 8-9). 10. Turn the ignition switch to ON (II), and 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.
11. Disconnect ECM/PCM connector B (44P).
12. Check for continuity between the oil pressure switch connector and body ground.
Repair a short to ground in the wire between
the oil pressure switch and ECM/PCM connector
terminal B7.
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).
Wire side of female terminal
I s OF F i nd i cat ed ?
I s OF F i nd i cat ed ?I s t he oi l pr essur e sw i t ch OK ? Is there continuity?
08/08/21 14:36:42 61SNR030_080_0008
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Engine Oil Temperature: 80 °C (176 °F)
Engine Oil Pressure:
At Idle: 70 kPa (0.7 kgf/cm , 10 psi) min.
At 3,000 rpm: 300 kPa (3.1 kgf/cm , 44 psi) min.
K20Z2 engine
Capacity
AtOilChange:4.0L(4.2USqt)
At Oil Change including Filter: 4.2 L (4.4 US qt)
After Engine Overhaul: 5.3 L (5.6 US qt)
K20Z3 engine
Capacity
AtOilChange:4.2L(4.4USqt)
At Oil Change including Filter: 4.4 L (4.6 US qt)
After Engine Overhaul: 5.5 L (5.8 US qt)
2
2
8-108-10Engine Lubrication
Oil Pressure Test
Engine Oil Replacement
A A
39 N·m
(4.0 kgf·m, 29 lbf·ft)
B
NOTE: If the oil pressure warning indicator stays on
with the engine running, check the engine oil l
evel. If
the oil level is correct do the following test:
1. With the engine stopped, remove the oil pressure switch (see page 8-9), then install an oil pressure
gauge (A).
2. Start the engine. Shut it off immediately if the gauge registers no oil pressure. Repair the problem
before continuing.
3. Allow the engine to reach operating temperature (fan comes on at least twice). The pressure should
be:
4. If the oil pressure is out of specifications, inspect these items:
 Blocking of oil filter (see page 8-11).
 Blocking of oil screen.
 Inspect the oil pressure relief valve (see page 8-15).
 Inspect the oil pump (see page 8-17). 1. Warm up the engine.
2. Remove the drain bolt (A), and drain the engine oil.
3. Reinstall the drain bolt with a new washer (B).
4. Refill the engine with the recommended oil
(see page 3-2).
Do not overtighten.
08/08/21 14:36:43 61SNR030_080_0010
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K20Z3 engine
Torque: 16 N·m (1.6 kgf·m, 12 lbf·ft)
8-14Engine Lubrication
Oil Jet Inspection
1.2 mm (0.05 in.)
1.2 mm
(0.05 in.)
A
B
1. Remove the oil jet, and inspect it as follows. Make sure that a 1.1 mm (0.04 in.) diameter drillwill go through the nozzle hole (A) (1.2 mm
(0.05 in.) diameter).
 Insert the other end of a 1.1 mm (0.04 in.) drill into the oil intake (1.2 mm (0.05 in.) diameter).
Make sure the check ball (B) moves smoothly and
has a stroke of approximately 4.0 mm (0.16 in.).
 Check the oil jet operation with an air nozzle. It should take at least 200 kPa (2.0 kgf/cm , 28 psi)
to unseat the check ball.
NOTE: Replace the oil jet assembly if the nozzle is
damaged or bent.
2. Carefully install the oil jet. The mounting torque is critical.
2
08/08/21 14:36:45 61SNR030_080_0014
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Exploded View - K20Z2 engine
9-2Intake Manifold and Exhaust System
Intake Manifold Removal and Installation
INTAKE AIR BYPASS (IAB)
THERMAL VALVE
JOINT GASKET
THROTTLE BODY
INTAKE MANIFOLD BRACKET
MANIFOLD
ABSOLUTE
PRESSURE
(MAP)
SENSOR INJECTOR BASE
EXHAUST GAS
PRECIRCULATION
(EGR) PLATE 6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) 8 x 1.25 mm
22 N·m
(2.2 kgf·m,
16 lbf·ft)
GASKET
INTAKE MANIFOLD
O-RING
5x0.8mm
3.4 N·m
(0.35 kgf·m, 2.5 lbf·ft)
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
GASKET
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
GASKET
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) 6x1.0mm
12 N·m
(1.2 kgf·m,
8.7 lbf·ft)
INTAKE MANIFOLD
CHAMBER
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
GASKET
MARK
Tigten the valve to 15 N·m
(1.5 kgf·m, 11 lbf·ft), then turn the
valve joint toward the mark.
Replace.
Replace if cracked or
if mating surface is
damaged.
Replace.
Replace if cracked or
if mating surface is
damaged.
Replace.
Replace.
Replace.
Replace.
08/08/21 14:37:29 61SNR030_090_0002
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Removal - K20Z2 engine
9-3
A
B C A
B
C D
A
1. Remove the engine cover.
2. Disconnect the vacuum hose (A) and the breatherpipe (B), then remove the intake air duct (C). 3. Disconnect the engine wire harness connectors,
and remove the wire harness clamps from the
intake manifold:
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector
4. Disconnect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum
hose (B).
5. Remove the harness bracket mounting bolt (C) and the brake booster vacuum line bracket mounting
bolt (D).
6. Disconnect the water bypass hoses (A), then plug the water bypass hoses.
(cont’d)
08/08/21 14:37:30 61SNR030_090_0003
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9-5
A
A
B
C
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft) D
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
B
C A
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
6. Connect the water bypass hoses (A).
7. Connect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum hose (B).
8. Install the harness bracket mounting bolt (C) and the brake booster vacuum line bracket mounting
bolt (D).
9. Connect the engine wire harness connectors, and install the wire harness clamps to the intake
manifold.
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector 10. Install the intake air duct (A), then connect the
vacuum hose (B) and the breather pipe (C).
11. Install the engine cover.
12. After installation, check that all tubes, hoses and connectors are installed correctly.
13. Clean up any spilled engine coolant.
14. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8).
08/08/21 14:37:32 61SNR030_090_0005
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Exploded View - K20Z3 engine
9-6Intake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont’d)
JOINT
GASKET
5x0.8mm
3.4 N·m
(0.35 kgf·m, 2.5 lbf·ft)
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) GASKET
O-RING
MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR
INTAKE MANIFOLD BRACKET
INTAKE MANIFOLD
THROTTLE BODY
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) 8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
MARK
INTAKE AIR BYPASS (IAB)
THERMAL VALVE
Replace.
Replace.
Replace.
Replace if cracked or if
mating surface is damaged. Tighen the valve to 15 N·m
(1.5 kgf·m, 11 lbf·ft), then turn the
valve joint toward the mark.
08/08/21 14:37:33 61SNR030_090_0006
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Removal - K20Z3 engine
9-7
A
B C A
B
C
A B
C
1. Remove the engine cover.
2. Relieve the fuel pressure (see page 11-322).
3. Disconnect the vacuum hose (A) and the breather
pipe (B), then remove the intake air duct (C). 4. Disconnect the following engine wire harness
connectors, and remove the wire harness clamps
from the intake manifold:
 Four fuel injector connectors
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector
5. Remove the ground cable (A) and the harness clamp bracket (B), then remove the harness holder
(C) from the bracket.
6. Disconnect the positive crankcase ventilation (PCV) hose (A), the evaporative emission (EVAP) canister
hose (B) and the brake booster vacuum hose (C).
(cont’d)
08/08/21 14:37:34 61SNR030_090_0007
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9-10Intake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont’d)
A
B
C
B
C
A 6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft) B
C A
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
8. Connect the positive crankcase ventilation (PCV) hose (A), the evaporative emission (EVAP) canister
hose (B) and the brake booster vacuum hose (C).
9. Install the harness holder (A) to the bracket, then install the ground cable (B) and the harness clamp
bracket (C).
10. Connect the engine wire harness connectors, and install the wire harness clamps to the intake
manifold:
 Four fuel injector connectors
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector 11. Install the intake air duct (A), then connect the
vacuum hose (B) and breather pipe (C).
12. Install the engine cover.
13. Inspect for fuel leaks. Turn the ignition switch to ON (II) (do not operate the starter) so the fuel pump
runs for about 2 seconds and pressurizes the fuel
line. Repeat this operation three times, then check
for fuel leakage at any point in the fuel line.
14. Clean up any spilled engine coolant.
15. After installation, check that all tubes, hoses and connectors are installed correctly.
16. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8).
08/08/21 14:37:36 61SNR030_090_0010
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