Engine air ACURA CSX 2006 Service Owners Manual

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11-72PGM-FI System
Component Location Index
IGNITION COILS
CAMSHAFT POSITION (CMP)
SENSOR B (EXHAUST SIDE)
ELECTRICAL LOAD
DETECTOR (ELD)
PGM-FI MAIN
RELAY 1IGNITION
COIL RELAY
PGM-FI
SUBRELAY
MASS AIR FLOW (MAF)
SENSOR/INTAKE AIR
TEMPERATURE
(IAT) SENSOR
ENGINE COOLANT
TEMPERATURE (ECT) SENSOR 1
OUTPUT SHAFT (COUNTERSHAFT)
SPEED SENSOR (M/T)
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR
KNOCK SENSOR
INJECTORS
CRANKSHAFT POSITION
(CKP) SENSOR ENGINE CONTROL MODULE (ECM)/
POWERTRAIN CONTROL
MODULE (PCM)
Replacement, page 11-222
Replacement, page 11-226
Replacement,page 11-224
Replacement, page 11-225
Replacement, page 11-223
Replacement, page 11-225
Replacement, page 11-224
Replacement, page 11-223
Replacement,
page 11-219
Replacement,
page 11-222 Update, page 11-227
Substitution, page 11-7
Replacement, page 11-228
* : This illustration shows K20Z2 engine
08/08/21 14:15:36 61SNR030_110_0072
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DYNOMITE -2009-

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DTC P0101:
YES
NO
YES
NO
YES
NO YES
NO
YES
NO
YES
NO
11-74
PGM-FI System
DTC Troubleshooting
MAF Sensor Circuit Range/
Performance Problem
NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If DTC P1128, P1129, P2228, and/or P2229 are stored at the same time as DTC P0101, troubleshoot those
DTCs first, then recheck for DTC P0101.
1. Check for poor connections or damage to these parts:
 PCV hose
 Intake air duct
 Air cleaner
 Purge (PCS) line
 Brake booster
 Brake booster hose
Go to step 2.
Repair or replace the damaged part(s), then
go to step 17.
2. Check for damage or looseness at the air duct in the air cleaner.
Go to step 3.
Reconnect or replace the air duct in the air
cleaner, then go to step 15.
3. Check for a dirty air cleaner element.
Replace the air cleaner element (see page
11-346), then go to step 15.
Go to step 4. 4. Turn the ignition switch to LOCK (0).
5. Turn the ignition switch to ON (II).
6. Check the MAF SENSOR in the DATA LIST with the
HDS.
Go to step 7.
Go to step 13.
7. Start the engine.
8. Vary the engine speed between 2,000 rpm and 3,000 rpm.
9. Check the MAF SENSOR in the DATA LIST with the HDS.
Go to step 10.
Go to step 13.
10. 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.
11. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
 ENGINE S PEED
 VSS
 MAP SENSOR
 MAF SENSOR
12. Monitor the OBD STATUS for DTC P0101 in the DTCs MENU with the HDS.
Go to step 13.
If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals at the MAF
sensor/IAT sensor and the ECM/PCM. If the screen
indicates NOT COMPLETED, go to step 11 and
recheck.
Ar e t he par t s OK ?
Is it OK ?Is it dirty? Is t her e about 0.2 gm/ s or 0.5 V ?
Does t he r ead i ng change?
Does t he scr een i nd i cat e F AILE D?
08/08/21 14:15:37 61SNR030_110_0074
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YES
NO
YES
NO YES
NO
YES
NO
DTC P0102:
11-7511-75
13. Turn the ignition switch to LOCK (0).
14. Replace the MAF sensor/IAT sensor (see page
11-224).
15. Turn the ignition switch to ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see page 11-310).
18. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
 ENGINE S PEED
 VSS
 MAP SENSOR
 MAF SENSOR
19. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the MAF sensor/IAT sensor and the
ECM/PCM, then go to step 1.
Go to step 20.
20. Monitor the OBD STATUS for DTC P0101 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 19,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the MAF sensor/
IATsensorandtheECM/PCM,thengotostep1.If
the screen indicates NOT COMPLETED, go to step
18. NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II), and wait 2 seconds.
2. Check the MAF SENSOR in the DATA LIST with the HDS.
Go to step 3.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the MAF sensor/IAT sensor and the ECM/PCM.
3. Turn the ignition switch to LOCK (0).
4. Check the No. 3 ALTERNATOR (10 A) fuse in the under-dash fuse/relay box.
Go to step 4.
Repair short in the wire between the MAF
sensor/IAT sensor and the No. 3 ALTERNATOR
(10 A) fuse. Also replace the No. 3 ALTERNATOR
(10 A) fuse, then go to step 20.
5. Disconnect the MAF sensor/IAT sensor 5P connector.
6. Turn the ignition switch to ON (II).
(cont’d)MAF Sensor Circuit Low Voltage
Is DT C P0101 ind icated ?Does t he scr een i nd i cat e PASSE D? I s about 0 gm/ s or 0.1 V or l ess i nd i cat ed ?
IsthefuseOK?
08/08/21 14:15:38 61SNR030_110_0075
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YES
NO
YES
NO
YES
NO
11-77
MAF SENSOR/IAT SENSOR 5P CONNECTOR
ECM/PCM CONNECTOR B (44P)
VG (RED/BLK) VG (RED/BLK)
13. Check for continuity between MAF sensor/IAT
sensor 5P connector terminal No. 1 and ECM/PCM
connector terminal B30.
Go to step 26.
Repair open in the wire between the ECM/
PCM (B30) and the MAF sensor/IAT sensor, then go
to step 21. 14. Substitute a known-good MAF sensor/IAT sensor
(see page 11-224).
15. Reconnect all connectors.
16. Turn the ignition switch to ON (II).
17. Clear the DTC with the HDS.
18. Start the engine. Hold the engine speed at 2,000 rpm without load (A/T in P or N, M/T in
neutral).
19. Check for Temporary DTCs or DTCs with the HDS.
Go to step 27.
Replace the original MAF sensor/IAT sensor
(see page 11-224), then go to step 20.
20. Turn the ignition switch to LOCK (0).
21. Reconnect all connectors.
22. Turn the ignition switch to ON (II).
23. Reset the ECM/PCM with the HDS.
24. Do the ECM/PCM idle learn procedure (see page 11-310).
25. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the MAF sensor/IAT sensor and the
ECM/PCM, then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
(cont’d)
Wire side of female terminals
Terminal side of female terminals
Is there continuity? Is DT C P0102 ind icated ?
Is DT C P0102 ind icated ?
08/08/21 14:15:39 61SNR030_110_0077
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YES
NO YES
NO
YES
NO
11-105
SECONDARY HO2S (SENSOR 2) 4P CONNECTOR
SHO2S (WHT)
13. Check for continuity between secondary HO2S(Sensor 2) 4P connector terminal No. 2 and body
ground.
Repair short in the wire between the ECM/
PCM (C27) and the secondary HO2S (Sensor 2),
then go to step 16.
Go to step 24.
14. Turn the ignition switch to LOCK (0).
15. Replace the secondary HO2S (Sensor 2) (see page 11-221).
16. Reconnect all connectors.
17. Turn the ignition switch to ON (II).
18. Reset the ECM/PCM with the HDS.
19. Do the ECM/PCM idle learn procedure (see page 11-310).
20. Start the engine, and let it idle without load (A/T in P or N, M/T in neutral) until the radiator fan comes
on. 21. Test-drive under these conditions:
 Engine coolant temperature (ECT SENSOR 1)above70°C(158°F)
 A/TinD,M/Tin4th
 Engine speed between 1,500 3,000 rpm
 Drive about 1 minute or more
22. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the secondary HO2S (Sensor 2) and
theECM/PCM,thengotostep1.
Go to step 23.
23. Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 22,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the secondary
HO2S(Sensor2)andtheECM/PCM,thengotostep
1. If the screen indicates EXECUTING, keep driving
until a result comes on. If the screen indicates OUT
OF CONDITION, go to step 20.
(cont’d)
Terminal side of male terminals
Is there continuity? Is DT C P0137 ind icated ?
Does t he scr een i nd i cat e PASSE D?
08/08/21 14:17:21 61SNR030_110_0105
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DTC P0141:
YES
NO
YES
NO YES
NO
YES
NO
11-110PGM-FI System
DTC Troubleshooting (cont’d)
SECONDARY HO2S (SENSOR 2) 4P CONNECTOR
SECONDARY HO2S (SENSOR 2) 4P CONNECTOR
Secondary HO2S (Sensor 2)
Heater Circuit Malfunction
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for Temporary DTCs or DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the secondary HO2S (Sensor 2) and the ECM/
PCM.
5. Turn the ignition switch to LOCK (0).
6. Check the No. 3 ALTERNATOR (10 A) fuse in the under-dash fuse/relay box.
Go to step 7.
Repair short in the wire between the
secondary HO2S (Sensor 2) and the No. 3
ALTERNATOR (10 A) fuse. Also replace the No. 3
ALTERNATOR (10 A) fuse, then go to step 23.
7. Disconnect the secondary HO2S (Sensor 2) 4P connector. 8. At the secondary HO2S (Sensor 2) side, measure
the resistance between secondary HO2S (Sensor 2)
4P connector terminals No. 3 and No. 4.
Go to step 9.
Go to step 22.
9. At the secondary HO2S (Sensor 2) side, check for continuity between body ground and secondary
HO2S (Sensor 2) 4P connector terminals No. 3 and
No. 4 individually.
Go to step 22.
Go to step 10.
Wire side of female terminals
Wire side of female terminalsIs DTC P0141 indicated?
IsthefuseOK? Is t her e 5.4 7 .3 at r oom t emper at ur e?
Is there continuity?
08/08/21 14:17:23 61SNR030_110_0110
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YES
NO
YES
NO
YES
NO
DTC P0171:
DTC P0172:
11-11311-113
29. Reconnect all connectors.
30. 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).
31. Start the engine, and let idle.
32. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the secondary HO2S (Sensor 2) and
the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see page 11-7),
then go to step 31. If the ECM/PCM was substituted,
go to step 1.
Go to step 33.
33. Monitor the OBD STATUS for DTC P0141 in the DTCs MENU with the HDS.
If the ECM/PCM was updated,
troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM
(see page 11-228). If any other Temporary DTCs or
DTCs were indicated in step 32, go to the indicated
DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the secondary
HO2S (Sensor 2) and the ECM/PCM. If the ECM/
PCM was updated, substitute a known-good ECM/
PCM (see page 11-7), then go to step 31. If the ECM/
PCM was substituted, go to step 1. If the screen
indicates NOT COMPLETED, keep idling until a
result comes on. NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If any of the DTCs listed below are indicated at the same time as DTC P0171 and/or P0172, troubleshoot
those DTCs first, then recheck for P0171 and/or P0172.
P0101, P0102, P0103: Mass air flow (MAF) sensor
P0107, P0108, P1128, P1129: Manifold absolute
pressure (MAP) sensor
P0133, P1157, P1172, P2195, P2238, P2252, P2A00: Air
fuel ratio (A/F) sensor (Sensor 1)
P0134, P0135: Air fuel ratio (A/F) sensor (Sensor 1)
heater
P0137, P0138, P0139, P2270, P2271: Sec ondary HO2S
(Sensor 2)
P0141: Secondary HO2S (Sensor 2) heater
P0401 , P0404 , P0406 , P2413 : Exhaust gas
recirculation (EGR) system
P0443, P0496: EVAP canister purge valve
P2646, P2647, P2648, P2649: VTEC system : K20Z2 engine
1. Check the fuel pressure (see page 11-325).
Go to step 2.
 If the pressure is too high, replace the fuel pressure regulator (see page 11-337), then go to
step 7.
 If the pressure is too low, check the fuel pump, the fuel feed pipe and the fuel filter. If they are
OK, replace the fuel pressure regulator (see page
11-337), then go to step 7.
(cont’d)Fuel System Too Lean
Fuel System Too Rich
Is DTC P0141 indicated?Does t he scr een i nd i cat e PASSE D? Is the fuel pressure OK?
08/08/21 14:17:24 61SNR030_110_0113
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YES
NO
YES
NO YES
NO
YES
NO
11-114
PGM-FI System
DTC Troubleshooting (cont’d)
2. Check for vacuum leaks at these parts:
 PCV valve
 PCV hose
 EVAP canister purge valve
 Throttle body
 Intake manifold
 Brake booster
 Brake booster hose
 Intake air duct
Go to step 3.
Repair or replace the part(s) with leaks, then
go to step 7.
3. 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.
4. Check for these conditions:  Engine coolant temperature (ECT SENSOR 1)above70°C(158°F)
 A/T in N, M/T in neutral
 All electrical loads off
5. Monitor the ENGINE SPEED in the DATA LIST with the HDS, and hold the engine speed at 2,500 rpm.
Once the engine speed is met, hold the accelerator
pedal steady for more than 10 seconds.
Repeat step 5.
Go to step 6. 6. While holding the engine speed at 2,500 rpm, check
the MAF SENSOR in the DATA LIST with the HDS.
Check the engine valve clearances and adjust
them if needed; K20Z2 engine (see page 6-12),
K20Z3 engine (see page 6-14). If the valve
clearances are OK, replace the injectors (see page
11-219), then go to step 7.
Replace the MAF sensor/IAT sensor (see page
11-224), then go to step 7.
7. Turn the ignition switch to ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see page 11-310).
10. 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.
11. Test-drive under these conditions:  Engine coolant temperature (ECT SENSOR 1)above70°C(158°F)
 A/TinD,M/Tin4th
 Drive at a steady speed between 24 120 km/h (15 75 mph) for 15 minutes
NOTE: DTC P0171 and/or P0172 may take up to
80 minutes of test driving to set. Using the HDS,
monitor or the air fuel feed back average (AF FB
AVE). If the AF FB AVE stays within 0.80 1.25,
there is no problem at this time.
12. Check for Temporary DTCs or DTCs with the HDS.
Go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Ar e t he par t s OK ?
Di d t he engi ne speed v ar y mor e t han 100 r pm f r om2,500 rpm? Is t her e about 6.0 8.6 ( K 20Z 2 engi ne) or 5.7
8.3(K20Z3engine)gm/s?
I s DT C P017 1 or P017 2 i nd i cat ed ?
08/08/21 14:17:24 61SNR030_110_0114
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DTC P0300:
DTC P0301:
DTC P0302:
DTC P0303:
DTC P0304:
Special Tools Required YES
NO
YES
NO
YES
NO
11-115
Random Misfire and Any
Combination of the Following:
No. 1 Cylinder Misfire Detected
No. 2 Cylinder Misfire Detected
No. 3 Cylinder Misfire Detected
No. 4 Cylinder Misfire Detected
 Pressure gauge adapter 07NAJ-P07010A
 A/T low pressure gauge w/panel 07406-0070301
 A/T pressure hose 07406-0020201
 A/T pressure hose, 2,210 mm 07MAJ-PY4011A
 A/T pressure hose, adapter 07MAJ-PY40120
 Oil pressure hose 07ZAJ-S5AA200
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If the misfire is frequent enough to trigger detection of increased emissions during two consecutive
driving cycles, the MIL will come on, and DTC P0300
(and some of the combination of P0301 thr ough
P0304) will be stored.
 If the misfire is frequent enough to damage the catalyst, the MIL will blink whenever the misfire
occurs, and DTC P0300 (and some of the combination
of P0301 through P0304) will be stored. When the
misfire stops, the MIL will remain on.
 If any of the DTCs listed below are indicated at the same time as the random misfire DTCs, troubleshoot
those DTCs first, then recheck for random misfire
DTCs:
P0101, P0102, P0103: Mass air flow (MAF) sensor
P0107, P0108: Manifold absolute pressure (MAP)
sensor
P0171, P0172: Fuel system
P0335, P0339: Crankshaft position (CKP) sensor
P0365, P0369: Camshaft position (CMP) sensor B
P0401 , P0404 , P0416 , P2413 : Exhaust gas
recirculation (EGR) system
P0506, P0507: Idle control system
P2646, P2647, P2648, P2649: VTEC system : K20Z2 engine 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle without load (A/T in
P or N, M/T in neutral).
4. Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS.
Go to step 9.
If the screen indicates PASSED, go to step 5. If
the screen indicates EXECUTING, keep idling until
a result comes on. If the screen indicates OUT OF
CONDITION, wait for several minutes, then recheck.
5. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.
Go to step 9.
Go to step 6.
6. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
 ENGINE S PEED
 VSS
 REL TP SENSOR
 CLV (calculated load value)
 APP SENSOR
7. Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS.
Go to step 9.
If the screen indicates PASSED, go to step 8. If
the screen indicates EXECUTING, keep driving until
a result comes on. if the screen indicates OUT OF
CONDITION, go to step 6 and recheck.
(cont’d)
Does t he scr een i nd i cat e F AILE D?
Does the CYL1 MISFIRE, CYL2 MISFIRE, CYL3M I SF I RE , and / or CY L4 M I SF I RE show mi sf i r ecounts?
Does t he scr een i nd i cat e F AILE D?
08/08/21 14:17:24 61SNR030_110_0115
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YES
NO YES
NO
YES
NO
11-117
07406-0020201 or
07MAJ-PY4011A and
07MAJ-PY40120
A
22 N·m
(2.2 kgf·m,
16 lbf·ft)
07406-0070301
B
07NAJ-P07010A
07ZAJ-S5AA200
19. Turn the ignition switch to LOCK (0).
20. Remove the cowl cover and the under cowl panel (see page 20-163).
21. Remove the rocker arm oil pressure switch (A), and attach the special tools as shown, then attach the
rocker arm oil pressure switch to the pressure
gauge attachment (B).
NOTE: Install the parts in the reverse order of
removal with a new O-ring.
22. Reconnect the rocker arm oil pressure switch 2P connector.
23. 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.
24. Check the oil pressure at engine speeds of 1,000 rpm and 2,000 rpm.
Check for air in the fuel line, then go to step
25.
Inspect the VTEC system, then go to step 25. 25. Turn the ignition switch to ON (II).
26. Reset the ECM/PCM with the HDS.
27. Clear the CKP pattern with the HDS.
28. Do the ECM/PCM idle learn procedure (see page
11-310).
29. Do the CKP pattern learn procedure (see page 11-4).
30. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
 ENGINE S PEED
 VSS
 REL TP SENSOR
 CLV (calculated load value)
 APP SENSOR
31. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the ignition coil(s), the injector(s), and
the ECM/PCM, then go to troubleshooting DTC
P0301, P0302, P0303, or P0304 (see page 11-118).
Go to step 32.
32. Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 31,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, go to step 1
and recheck. If the screen indicates EXECUTING,
keep driving until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 30.
Is t he oi l pr essur e bel ow 49 k Pa ( 0.5 k gf / cm , 7psi)? Is DT C P0300, P0301, P0302, P0303, or P0304
indicated?
Does t he scr een i nd i cat e PASSE D?2
08/08/21 14:17:25 61SNR030_110_0117
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