2006 ACURA CSX low oil pressure

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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
ProCarManuals.com
DYNOMITE -2009-

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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
ProCarManuals.com
DYNOMITE -2009-


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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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DYNOMITE -2009-

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Fuel and Emissions
Fuel and Emissions Systems
PGM-FI System
Electronic Throttle Control System
VTEC/VTC
Idle Control SystemFuel Supply System
Intake Air System
Catalytic Converter System
EGR System
PCV System
EVAP System..................................................
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Special Tools . 11-2
General Troubleshooting Information . 11-3
DTC Troubleshooting Index . 11-9
Symptom Troubleshooting Index . 11-13
System Description . 11-15
How to Set Readiness Codes . 11-69
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Component Location Index . 11-72
DTC Troubleshooting . 11-74
F-CAN Circuit Troubleshooting . 11-191
MIL Circuit Troubleshooting . 11-203
DLC Circuit Troubleshooting . 11-204
Injector Replacement . 11-219
A/F Sensor Replacement . 11-221
Secondary HO2S Replacement . 11-221
CMP Sensor B Replacement . 11-222
CKP Sensor Replacement . 11-222
Output Shaft (Countershaft) Speed Sensor
Replacement . 11-223
Knock Sensor Replacement . 11-223
MAP Sensor Replacement . 11-224
MAF Sensor/IAT Sensor Replacement . 11-224
ECT Sensor 1 Replacement . 11-225
ECT Sensor 2 Replacement . 11-225
ELD Replacement . 11-226
ECM/PCM Update . 11-227
ECM/PCM Replacement . 11-228
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Component Location Index . 11-231
DTC Troubleshooting . 11-232
APP Sensor Signal Inspection . 11-268
Accelerator Pedal Module
Removal/Installation . 11-269
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Component Location Index
. 11-273
DTC Troubleshooting . 11-274
VTC Oil Control Solenoid Valve Removal/Test/Installation . 11-294
CMP Sensor A Replacement . 11-295
Rocker Arm Oil Control Valve Removal/Installation . 11-296
Rocker Arm Oil Pressure Switch Removal/Installation . 11-296
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Component Location Index
. 11-297
DTC Troubleshooting . 11-298
A/C Signal Circuit Troubleshooting . 11-306
Alternator FR Signal Circuit Troubleshooting . 11-307
Brake Pedal Position Switch Signal Circuit Troubleshooting . 11-308
Idle Speed Inspection . 11-309
ECM/PCM Idle Learn Procedure . 11-310 ..........................
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Component Location Index
. 11-311
DTC Troubleshooting . 11-313
Fuel Pump Circuit Troubleshooting . 11-318
Fuel Pressure Relieving . 11-322
Fuel Pressure Test . 11-325
Fuel Tank Draining . 11-325
Fuel Line Inspection . 11-326
Fuel Line/Quick-Connect Fitting Precautions . 11-328
Fuel Line/Quick-Connect Fitting Removal . 11-329
Fuel Line/Quick-Connect Fitting Installation . 11-331
Fuel Tank Unit Removal and Installation . 11-334
Fuel Pressure Regulator Replacement . 11-337
Fuel Filter Replacement . 11-337
Fuel Pump/Fuel Gauge Sending Unit Replacement . 11-338
Fuel Tank Replacement . 11-339
Fuel Gauge Sending Unit Test . 11-340
Low Fuel Indicator Test . 11-341
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Component Location Index
. 11-342
Throttle Body Test . 11-343
Throttle Body Cleaning . 11-344
Intake Air Bypass Control Thermal Valve Test . 11-344
Air Cleaner Removal/Installation . 11-345
Air Cleaner Element Inspection/Replacement . 11-346
Intake Air Resonator Removal/Installation . 11-346
Throttle Body Removal/Installation . 11-348
Throttle Body Disassembly/Reassembly . 11-350
Intake Air Bypass Control Thermal Valve Replacement . 11-351
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Component Location Index
. 11-352
DTC Troubleshooting . 11-353
Catalytic Converter Removal/Installation . 11-355
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Component Location Index
. 11-356
DTC Troubleshooting . 11-357
EGR Valve Replacement . 11-370
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Component Location Index
. 11-371
PCV Valve Inspection . 11-372
PCV Valve Replacement . 11-373
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Component Location Index
. 11-374
DTC Troubleshooting . 11-375
Fuel Cap Warning Message System Troubleshooting . 11-405
EVAP Canister Replacement . 11-407
FTP Sensor Replacement . 11-408
EVAP Canister Vent Shut Valve Replacement . 11-409
EVAP Canister Purge Valve Replacement . 11-409
08/08/21 14:12:30 61SNR030_110_0001
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DYNOMITE -2009-

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%)Ref. No. Tool Number Description Qty
11-2
Fuel and Emissions Systems
Special Tools
07AAA-SNAA100
Fuel Pump Module Locknut Wrench 1
07AAJ-S6MA150 Fuel Pressure Gauge Attachment Set 1
07JAZ-001000B Vacuum/Pressure Gauge, 0 4 in.Hg 1
07NAJ-P07010A Pressure Gauge Adapter 1
07ZAJ-S5AA200 Oil Pressure Hose 1
-1 07406-0020201 A/T Pressure Hose 1
-2 07406-0070301 A/T Low Pressure Gauge W/Panel 1
-3 07MAJ-PY4011A A/T Pressure Hose, 2,210 mm 1
-4 07MAJ-PY40120 A/T Pressure Adapter 1
07406-004000B Fuel Pressure Gauge 1
-1, -2, -3, -4
08/08/21 14:12:31 61SNR030_110_0002
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DYNOMITE -2009-

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DTC
(MIL indication ) Two Drive Cycle
Detection Detection Item MIL Note
11-9
DTC Troubleshooting Index
P0010 (56)
Variable Valve Timing Control (VTC) Oil Control Solenoid Valve
Malfunction ON (see page 11-274)
P0011 (56) Variable Valve Timing Control (VTC) System Malfunction ON (see page 11-276)
P0101 (50) Mass Air Flow (MAF) Sensor Circuit Range/Performance Problem ON (see page 11-74)
P0102 (50) Mass Air Flow (MAF) Sensor Circuit Low Voltage ON (see page 11-75)
P0103 (50) Mass Air Flow (MAF) Sensor Circuit High Voltage ON (see page 11-78)
P0107 (3) Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage ON (see page 11-80)
P0108 (3) Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage ON (see page 11-82)
P0111 (10) Intake Air Temperature (IAT) Sensor Circuit Range/Performance
Problem ON (see page 11-85)
P0112 (10) Intake Air Temperature (IAT) Sensor Circuit Low Voltage ON (see page 11-86)
P0113 (10) Intake Air Temperature (IAT) Sensor Circuit High Voltage ON (see page 11-87)
P0116 (86) Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/
Performance Problem ON (see page 11-90)
P0117 (6) Engine Coolant Temperature (ECT) Sensor 1 Circuit Low Voltage ON (see page 11-91)
P0118 (6) Engine Coolant Temperature (ECT) Sensor 1 Circuit High Voltage ON (see page 11-92)
P0122 (7) Throttle Position (TP) Sensor A Circuit Low Voltage ON (see page 11-232)
P0123 (7) Throttle Position (TP) Sensor A Circuit High Voltage ON (see page 11-234)
P0125 (86) Engine Coolant Temperature (ECT) Sensor 1 Malfunction/Slow
Responce ON (see page 11-95)
P0128 (87) Cooling System Malfunction ON (see page 11-96)
P0133 (61) Air Fuel Ratio (A/F) Sensor (Sensor 1) Malfunction/Slow Response ON (see page 11-97)
P0134 (41) Air Fuel Ratio (A/F) Sensor (Sensor 1) Heater System Malfunction ON (see page 11-98)
P0135 (41) Air Fuel Ratio (A/F) Sensor (Sensor 1) Heater Circuit Malfunction ON (see page 11-99)
P0137 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit Low Voltage ON (see page 11-104)
P0138 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit High Voltage ON (see page 11-106)
P0139 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Slow Response ON (see page 11-109)
P0141 (65) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Heater Circuit Malfunction ON (see page 11-110)
P0171 (45) Fuel System Too Lean ON (see page 11-113)
P0172 (45) Fuel System Too Rich ON (see page 11-113)
P0222 (7) Throttle Position (TP) Sensor B Circuit Low Voltage ON (see page 11-236)
P0223 (7) Throttle Position (TP) Sensor B Circuit High Voltage ON (see page 11-239)
P0300 (75)
and any
combination of
the following:
P0301 (71)
P0302 (72)
P0303 (73)
P0304 (74) Random Misfire Detected
ON (see page 11-115)
P0301 (71) No. 1 Cylinder Misfire Detected ON (see page 11-118)
P0302 (72) No. 2 Cylinder Misfire Detected ON (see page 11-118)
P0303 (73) No. 3 Cylinder Misfire Detected ON (see page 11-118)
P0304 (74) No. 4 Cylinder Misfire Detected ON (see page 11-118)
NOTE:  The above DTCs are indicated when the PGM-FI system is selected with the HDS.
 Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs.
: These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS.
4: K20Z2 engine
5: K20Z3 engine
(cont’d)
4
5 4
5
08/08/21 14:12:35 61SNR030_110_0009
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DYNOMITE -2009-

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DTC
(MIL indication ) Two Drive Cycle
Detection Detection Item MIL Note
11-12Fuel and Emissions Systems
DTC Troubleshooting Index (cont’d)
P2227 (13)
Barometric Pressure (BARO) Sensor Circuit Range/Performance
Problem ON (see page 11-176)
P2228 (13) Barometric Pressure (BARO) Sensor Circuit Low Voltage ON (see page 11-177)
P2229 (13) Barometric Pressure (BARO) Sensor Circuit High Voltage ON (see page 11-177)
P2238 (48) Air Fuel Ratio (A/F) Sensor (Sensor 1) AFS Circuit Low Voltage ON (see page 11-178)
P2252 (48) Air Fuel Ratio (A/F) Sensor (Sensor 1) AFS Circuit Low Voltage ON (see page 11-179)
P2270 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit Signal Stuck Lean ON (see page 11-181)
P2271 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit Signal Stuck Rich ON (see page 11-181)
P2413 (12) Exhaust Gas Recirculation (EGR) System Malfunction ON (see page 11-363)
P2422 (117) Evaporative Emission (EVAP) Canister Vent Shut Valve Stuck Closed
Malfunction ON (see page 11-402)
P2610 (132) Engine Control Module (ECM)/Powertrain Control Module (PCM)
Ignition Off Internal Timer Malfunction ON (see page 11-182)
P2646 (22) Rocker Arm Oil Pressure Switch Circuit Low Voltage ON (see page 11-284)
P2647 (22) Rocker Arm Oil Pressure Switch Circuit High Voltage ON (see page 11-287)
P2648 (21) Rocker Arm Oil Control Solenoid Circuit Low Voltage ON (see page 11-289)
P2649 (21) Rocker Arm Oil Control Solenoid Circuit High Voltage ON (see page 11-291)
P2A00 (61) Air Fuel Ratio (A/F) Sensor (Sensor 1) Circuit Range/Performance
Problem ON (see page 11-182)
U0028 (126) F-CAN Malfunction (BUS-OFF (Engine Control Module (ECM)/
Powertrain Control Module (PCM))) ON (see page 11-183)
U0122 (126) F-CAN Malfunction (Engine Control Module (ECM)/Powertrain
Control Module (PCM)-Vehicle Stability Assist (VSA) Modulator-
Control Unit) OFF (see page 11-184)
U0131 (126) F-CAN Malfunction (Engine Control Module (ECM)/Powertrain
Control Module (PCM)-Electrical Power Steering (EPS) Control Unit) OFF (see page 11-186)
U0155 (126) F-CAN Malfunction (Engine Control Module (ECM)/Powertrain
Control Module (PCM)-Gauge Control Module) ON (see page 11-188)
U0300 (131) PGM-FI System and A/T System Program Version Mismatch ON (see page 11-190)
NOTE:  The above DTCs are indicated when the PGM-FI system is selected with the HDS.
 Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs.
: These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS.
1: A/T
4: K20Z2 engine
6: with VSA
4
6
1
08/08/21 14:12:36 61SNR030_110_0012
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DYNOMITE -2009-

SymptomDiagnostic procedure Also check for
11-14Fuel and Emissions Systems
Symptom Troubleshooting Index (cont’d)










Low power
(MIL works OK, no DTCs set)
Check the fuel pressure (see page 11-325). Low compression
Incorrect camshaft
timing
Incorrect engine oil
level
Exhaust restriction
Engine stalls
(MIL works OK, no DTCs set) 1.
2.
3.
4.DotheECM/PCMidlelearnprocedure(seepage
11-310).
Check the fuel pressure (see page 11-325).
Check the idle speed (see page 11-309).
Troubleshoot the brake pedal position switch signal
circuit (see page 11-308). Intake air leaks
Faulty harness and
sensor
connections
Fuel contamination
Difficult to refuel
(MIL works OK, no DTCs set) 1.
2.
3.Check the fuel vent tube between the EVAP canister
and the fuel tank.
Check the fuel tank vapor recirculation tube between
thefuelpipeandthefueltank.
Replace the fuel tank (see page 11-339). Malfunctioning gas
station filling
nozzle.
Filler neck
restriction
Faulty fuel tank
vapor control valve
Fuel overflows during
refueling
(No DTCs set) Replace the fuel tank (see page 11-339). Malfunctioning gas
station filling nozzle.
HDS does not communicate
with the ECM/PCM or the
vehicle Troubleshoot the DLC circuit (see page 11-204).
Fuel cap warning message
stays on
(MIL works OK, no DTCs set)
(K20Z3 engine) Troubleshoot the fuel cap warning message system
(see page 11-405).
08/08/21 14:12:36 61SNR030_110_0014
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