2006 ACURA CSX reset

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DTC P0461: DTC P0462:
YES
NO
YES
NO YES
NO
YES
NO
11-31311-313
DTC Troubleshooting
Fuel Level Sensor (Fuel Gauge
Sending Unit) Circuit Range/Performance
Problem Fuel Level Sensor (Fuel Gauge
Sending Unit) Circuit Low Voltage
NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 Because it requires 260 km (162 miles) of driving without refueling to complete this diagnosis, DTC
P0461 cannot be duplicated during this
troubleshooting.
1. Test the fuel gauge sending unit (see page 11-340).
Check for poor connections or loose
terminals at the fuel gauge sending unit and the
gauge control module (tach).
Replace the fuel gauge sending unit (see page
11-338), then go to step 2.
2. Turn the ignition switch to ON (II).
3. Reset the ECM/PCM with the HDS.
4. Do the ECM/PCM idle learn procedure (see page 11-310).
5. Check for Temporary DTCs or DTCs with the HDS.
Go to the indicated DTC’s troubleshooting.
Troubleshooting is complete. 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, and wait 5 seconds.
3. Check for Temporary DTCs or DTCs with the HDS.
Go to step 4.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the gauge control module (tach) and the fuel
gauge sending unit.
4. Turn the ignition switch to LOCK (0).
5. Remove the rear seat cushion (see page 20-131).
6. Remove the rear floor upper cross-member and the access panel from the floor (see page 11-334).
7. Disconnect the fuel tank unit 4P connector.
8. Turn the ignition switch to ON (II).
9. Clear the DTC with the HDS, and wait 5 seconds.
10. Check for Temporary DTCs or DTCs with the HDS.
Replace the fuel gauge sending unit
(see page 11-338), then go to step 22.
Go to step 11.
11. Turn the ignition switch to LOCK (0).
12. Remove the gauge control module (tach) (see page 22-277).
13. Disconnect the gauge control module (tach) 36P connector.
(cont’d)
I s t he f uel gauge send i ng uni t OK ?
Ar e any T empor ar y DT Cs or DT Cs i nd i cat ed ? Is DTC P0462 indicated?
Is DTC P0463 indicated?
08/08/21 14:29:43 61SNR030_110_0313
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DYNOMITE -2009-


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YES
NO
YES
NO
YES
NO
11-314Fuel Supply System
DTC Troubleshooting (cont’d)
FUEL TANK UNIT 4P CONNECTOR
SIGNAL
(ORN)
E
8.9 mm
(0.35 in.)
A
14. Check for continuity between fuel tank unit 4P
connector terminal No. 1 and body ground.
Repair short in the wire between the gauge
control module (tach) (signal line) and the fuel
gauge sending unit, then go to step 23.
Go to step 15.
15. Reconnect the gauge control module (tach) 36P connector.
16. Remove the fuel tank unit (see page 11-334).
17. Connect the fuel tank unit 4P connector.
18. Turn the ignition switch to ON (II).
19. Clear the DTC with the HDS. 20. Set the float (A) to the E position.
21. Check the fuel gauge.
Go to step 29.
Replace the gauge control module (tach)
(see page 22-277), then go to step 22.
22. Turn the ignition switch to LOCK (0).
23. Reconnect all connectors.
24. Install the parts in the reverse order of removal.
25. Turn the ignition switch to ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure (see page 11-310).
28. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the gauge control module (tach) and
the fuel gauge sending unit, then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Wire side of female terminals
Is there continuity? Does the gauge move to the empty position?
Is DTC P0462 indicated?
08/08/21 14:29:43 61SNR030_110_0314
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DYNOMITE -2009-

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YES
NO
YES
NO
YES
NO
YES
NO
11-317
A
F
139.8 mm
(5.5 in.)
14. Remove the jumper wire from the fuel tank unit 4Pconnector.
15. Remove the fuel tank unit (see page 11-334).
16. Test the fuel gauge sending unit (see page 11-340).
Go to step 17.
Replace the fuel gauge sending unit (see page
11-338), then go to step 23.
17. Connect the fuel tank unit 4P connector.
18. Reconnect the gauge control module (tach) 36P connector.
19. Turn the ignition switch to ON (II).
20. Clear the DTC with the HDS.
21. Set the float (A) to the F position.
22. Check the fuel gauge.
Go to step 30.
Replace the gauge control module (tach)
(see page 22-277), then go to step 23. 23. Turn the ignition switch to LOCK (0).
24. Reconnect all connectors.
25. Install the parts in the reverse order of removal.
26. Turn the ignition switch to ON (II).
27. Reset the ECM/PCM with the HDS.
28. Do the ECM/PCM idle learn procedure (see page
11-310).
29. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the gauge control module (tach) and
the fuel gauge sending unit, then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
30. Reconnect all connectors.
31. Install the parts in the reverse order of removal.
32. 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).
33. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the gauge control module (tach) and
the fuel gauge sending unit. If the ECM/PCM was
updated, substitute a known-good ECM/PCM
(see page 11-7), then recheck. If the ECM/PCM was
substituted, go to step 1.
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 are indicated,
go to the indicated DTC’s troubleshooting.
I s t he f uel gauge send i ng uni t OK ?
Does t he gauge mov e t o t he f ul l posi t i on? Is DTC P0463 indicated?
Is DTC P0463 indicated?
08/08/21 14:29:44 61SNR030_110_0317
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DYNOMITE -2009-


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11-34411-344 Intake Air System
Throttle Body Cleaning
Intake Air Bypass Control Thermal
Valve Test
A A A
B
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, you
will seriously injure your fingers if the throttle valve
is activated.
1. Check for damage to the air cleaner. If the air cleaner element is damaged, replace it (see page
11-346).
2. Remove the throttle body; K20Z2 engine (see page 11-348), K20Z3 engine (see page 11-349).
3. Clean off the carbon from the throttle valve and inside the throttle body with a paper towel soaked
in throttle plate and induction cleaner.
NOTE: Remove the throttle body to clean it.
 Be careful not to pinch your fingers.
 To avoid removing the molybdenum coating, do not clean the bearing area of the throttle shaft (A).
 Do not spray throttle plate and induction cleaner directly on the throttle body.
 Use Honda genuine throttle plate and induction cleaner.
4. Install the throttle body (see page 11- 348).
5. Reset the ECM/PCM with the HDS (see page 11-4).
6. Turn the ignition switch to ON (II), and wait 2 seconds.
7. Do the ECM/PCM idle learn procedure (see page 11-310). Vacuum pump/gauge, 0 30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
1. Start the engine, then let it idle. NOTE: The engine coolant temperature must be
below 65 °C (149 °F).
2. Remove the engine cover (see step 1 on page 9-3).
3. Remove the vacuum hose (A) from the intake air duct, and connect a vacuum pump/gauge (B) to the
hose.
4. Raise and lower the engine speed, and make sure the vacuum gauge reading changes as the engine
speed changes.
If the vacuum reading does not change, check for
these problems:
 Misrouted, leaking, broken, or clogged intake air bypass control system vacuum lines.
 A cracked or damaged intake air bypass control thermal valve. Replace the valve if needed
(see page 11-351).
5. 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.
* : This illustration shows K20Z2 engine.
08/08/21 14:31:08 61SNR030_110_0344
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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).
08/08/21 14:31:09 61SNR030_110_0346
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DTC P0420:
YES
NO YES
NO
YES
NO
11-353
DTC Troubleshooting
Catalyst System Efficiency Below
Threshold
NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If some of the DTCs listed below are stored at the same time as DTC P0420, troubleshoot them first,
then recheck for DTC P0420.
P0137, P0138: Sec ondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) heater
 Poor quality fuel may cause this DTC.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
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. Test-drive under these conditions:  Engine coolant temperature (ECT SENSOR 1)above70°C(158°F)
 A/TinD,M/Tin5th
 Vehicle speed between 72 120 km/h (45 75 mph) for 5 minutes or more with cruise
control set
 K20Z2 engine: Maintain the vehicle speed at 88 km/h (55 mph) for 5 minutes or more with
cruise control set
 K20Z3 engine: Maintain the vehicle speed at 88 km/h (55 mph) for 30 seconds or more
5. Monitor the OBD STATUS for DTC P0420 in the DTCs MENU with the HDS.
Go to step 6.
If the screen indicates OUT OF CONDITION,
go to step 4 and recheck. If the screen indicates
PASSED, intermittent failure, the system is OK at
this time. If the screen indicates FAILED, go to step
8.
6. Continue test driving until a result comes on. 7. Monitor the OBD STATUS for DTC P0420 in the
DTCs MENU with the HDS.
Go to step 8.
If the screen indicates PASSED, intermittent
failure, the system is OK at this time. If the screen
indicates EXECUTING, keep driving until a result
comes on. If the screen indicates OUT OF
CONDITION, go to step 4 and recheck.
8. Turn the ignition switch to LOCK (0).
9. Replace the TWC (see page 11-355).
10. Turn the ignition switch to ON (II).
11. Reset the ECM/PCM with the HDS.
12. Do the ECM/PCM idle learn procedure (see page 11-310).
13. 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.
14. Test-drive for about 10 minutes, varying the vehicle speed.
15. Check the CATA MONITOR CONDITION in the DATA LIST with the HDS.
Go to step 16.
Go to step 13 and recheck.
16. Test-drive under these conditions:  Engine coolant temperature (ECT SENSOR 1)above70°C(158°F)
 A/TinD,M/Tin5th
 K20Z2 engine: Vehicle speed at 88 km/h (55mph) for 5 minutes or more with cruise control set
 K20Z3 engine: Vehicle speed at 88 km/h (55mph) for 30 seconds or more
(cont’d)
Does t he scr een i nd i cat e E X E CU T IN G?Does t he scr een i nd i cat e F AILE D?
Is the condition OK ?
08/08/21 14:31:13 61SNR030_110_0353
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DYNOMITE -2009-

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DTC P0401:
YES
NO
YES
NO YES
NO
YES
NO
11-357
DTC Troubleshooting
EGR Insufficient Flow
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. 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. Do the EGR TEST in the INSPECTION MENU with the HDS.
Go to step 5.
Go to step 7.
5. 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 88 120 km/h (55 75 mph) for at least 10 seconds
 During the drive, decelerate (with the throttle fully closed) for 5 seconds
6. Monitor the OBD STATUS for DTC P0401 in the DTCs MENU with the HDS.
RemovetheEGRplate(seepage9-2),and
clean the intake manifold port with throttle plate
and induction cleaner, then go to step 9.
If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals at the EGR
valve and the ECM/PCM. If the screen indicates
EXECUTING, keep driving until a result comes on. If
the screen indicates OUT OF CONDITION, go to
step 5 and recheck. 7. Turn the ignition switch to LOCK (0).
8. Replace the EGR valve (see page 11-370).
9. Turn the ignition switch to ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see page 11-310).
12. 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 88 120 km/h (55 75 mph) for at least 10 seconds
 During the drive, decelerate (with the throttle fully closed) for 5 seconds
13. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the EGR valve and the ECM/PCM. If the
connections are OK, go to step 15.
Go to step 14.
14. Monitor the OBD STATUS for DTC P0401 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 13,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the EGR valve
and the ECM/PCM, then go to step 1. If the screen
indicates EXECUTING, keep driving until a result
comes on. If the screen indicates OUT OF
CONDITION, go to step 12.
(cont’d)
Is the result OK ?
Does t he scr een i nd i cat e F AILE D? Is DT C P0401 ind icated ?
Does t he scr een i nd i cat e PASSE D?
08/08/21 14:31:15 61SNR030_110_0357
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DYNOMITE -2009-

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YES
NO
YES
NO
YES
NO
11-360EGR System
DTC Troubleshooting (cont’d)
14. Remove the EGR valve (see page 11-370).
15. Remove the EGR plate (see page 9-2), and clean the
intake manifold EGR port with throttle plate and
induction cleaner. Also, clean the passage inside
the EGR valve with throttle plate and induction
cleaner.
16. Install the EGR valve (see page 11-370).
17. Reconnect the EGR valve 6P connector.
18. Reconnect ECM/PCM connector B (44P).
19. Turn the ignition switch to ON (II).
20. Reset the ECM/PCM with the HDS.
21. Do the ECM/PCM idle learn procedure (see page 11-310).
22. 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.
23. Do the EGR TEST in the INSPECTION MENU with the HDS.
Go to step 32.
Go to step 24. 24. Turn the ignition switch to LOCK (0).
25. Replace the EGR valve (see page 11-370).
26. Reconnect all connectors.
27. Turn the ignition switch to ON (II).
28. Reset the ECM/PCM with the HDS.
29. Do the ECM/PCM idle learn procedure (see page
11-310).
30. 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.
31. Do the EGR TEST in the INSPECTION MENU with the HDS.
32. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the EGR valve and the ECM/PCM, then
go to step 1. If the connections and terminals are
OK,gotostep34.
Go to step 33.
33. Monitor the OBD STATUS for DTC P0404 in the DTCs MENU with the HDS.
Troubleshooting is complete. 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 EGR valve
and the ECM/PCM, then go to step 1. If the screen
indicates EXECUTING, keep idling until a result
comes on. If the screen indicates OUT OF
CONDITION, go to step 30.
Is the result OK ? Is DT C P0404 ind icated ?
Does t he scr een i nd i cat e PASSE D?
08/08/21 14:31:17 61SNR030_110_0360
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