Idle Air Control ACURA CSX 2006 Service Service Manual


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11-308Idle Control System
Brake Pedal Position Switch Signal Circuit Troubleshooting
ECM/PCM CONNECTOR A (44P)
BKSW (LT GRN)
1. Turn the ignition switch to ON (II).
2. Check the BRAKE SWITCH in the DATA LIST withthe HDS.
Go to step 3.
Inspect the brake pedal position switch
(see page 19-6).
3. Press the brake pedal while checking the BRAKE SWITCH in the DATA LIST with the HDS.
The brake pedal position switch signal circuit
(BKSW line) is OK.
Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Jump the SCS line with the HDS.
6. Disconnect the brake pedal position switch 4P connector.
7. Disconnect ECM/PCM connector A (44P). 8. Check for continuity between ECM/PCM connector
terminal A40 and body ground.
Repair short in the wire between the ECM/
PCM (A40) and the No. 12 HORN/STOP (15 A) fuse.
Also, replace the No. 12 HORN/STOP (15 A) fuse.
Go to step 9.
Terminal side of female terminals
Does it indicate OFF?
Does i t change t o ON ? Is there continuity?
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Idle speed should be:
K20Z2 engine:
M/T 700 50 rpm
A/T 800 50 rpm (in P or N)
K20Z3 engine: M/T 750 50 rpm
Idle speed should be:
K20Z2 engine: M/T 780 50 rpm
A/T 800 50 rpm (in P or N)
K20Z3 engine: M/T 750 50 rpm
Procedure
11-31011-310Idle Control System
Idle Speed Inspection (cont’d) ECM/PCM Idle Learn Procedure
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 idle speed without load conditions: headlights, blower fan, radiator fan, and air
conditioner off.
6. Let the engine idle for 1 minute with high electric load (A/C switch on, temperature set to max cool,
blower fan on high, and headlights on high beam).
NOTE: If the idle speed is not within specification,
dotheECM/PCMidlelearnprocedure(seepage
11-310). If the idle speed is still not within
specification, go to the symptom troubleshooting.
7. Reconnect the EVAP canister purge valve connector. The idle learn procedure must be done so the ECM/PCM
can learn the engine idle characteristics.
Do the idle learn procedure whenever you do any of
these actions:
 Replace the ECM/PCM.
 Reset the ECM/PCM.
 Update the ECM/PCM.
 Replace or clean the throttle body.
 Disassemble the engine or the transmission.
NOTE: Erasing DTCs with the HDS does not require you
to do the idle learn procedure.
1. Make sure all electrical items (A/C, audio, lights, etc.) are off.
2. Reset the ECM/PCM with the HDS.
3. Turn the ignition switch to ON (II), and wait 2 seconds.
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, or until the
engine coolant temperature reaches 90 °C (194 °F).
5. Let the engine idle for about 5 minutes with the throttle fully closed.
NOTE: If the radiator fan comes on, do not include
its running time in the 5 minutes.
08/08/21 14:29:38 61SNR030_110_0310
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Idle speed should be:
K20Z2 engine:
M/T 700 50 rpm
A/T 800 50 rpm (in P or N)
K20Z3 engine: M/T 750 50 rpm
Idle speed should be:
K20Z2 engine: M/T 780 50 rpm
A/T 800 50 rpm (in P or N)
K20Z3 engine: M/T 750 50 rpm
Procedure
11-31011-310Idle Control System
Idle Speed Inspection (cont’d) ECM/PCM Idle Learn Procedure
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 idle speed without load conditions: headlights, blower fan, radiator fan, and air
conditioner off.
6. Let the engine idle for 1 minute with high electric load (A/C switch on, temperature set to max cool,
blower fan on high, and headlights on high beam).
NOTE: If the idle speed is not within specification,
dotheECM/PCMidlelearnprocedure(seepage
11-310). If the idle speed is still not within
specification, go to the symptom troubleshooting.
7. Reconnect the EVAP canister purge valve connector. The idle learn procedure must be done so the ECM/PCM
can learn the engine idle characteristics.
Do the idle learn procedure whenever you do any of
these actions:
 Replace the ECM/PCM.
 Reset the ECM/PCM.
 Update the ECM/PCM.
 Replace or clean the throttle body.
 Disassemble the engine or the transmission.
NOTE: Erasing DTCs with the HDS does not require you
to do the idle learn procedure.
1. Make sure all electrical items (A/C, audio, lights, etc.) are off.
2. Reset the ECM/PCM with the HDS.
3. Turn the ignition switch to ON (II), and wait 2 seconds.
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, or until the
engine coolant temperature reaches 90 °C (194 °F).
5. Let the engine idle for about 5 minutes with the throttle fully closed.
NOTE: If the radiator fan comes on, do not include
its running time in the 5 minutes.
08/08/21 14:29:38 61SNR030_110_0310
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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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(#') Special Tools Required
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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Transmission End Cover
Transmission Housing
Valve Body
Torque Converter HousingShafts and Clutches
A/T Differential...................................
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End Cover Removal
. 14-290
Park Lever Stop Inspection and Adjustment . 14-292
Idler Gear Shaft Bearing Replacement . 14-292
Selector Control Shaft Oil Seal Replacement . 14-293
Selector Control Shaft Bearing Replacement . 14-293
ATF Feed Pipe Replacement . 14-294
End Cover Installation . 14-349
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Housing and Shaft Assembly Removal . 14-295
Bearing Removal
. 14-297
Bearing Installation . 14-298
Reverse Idler Gear Removal and Installation . 14-299
Shaft Assembly and Housing Installation . 14-344
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Valve Body and ATF Strainer Removal . 14-300
Valve Body Repair
. 14-301
Valve Body Valve Installation . 14-302
Main Valve Body Disassembly, Inspection, and Reassembly . 14-303
ATF Pump Inspection . 14-304
Regulator Valve Body Disassembly, Inspection, and Reassembly . 14-305
Servo Body Disassembly, Inspection, and Reassembly . 14-306
Shift Solenoid Valve Removal and Installation . 14-307
Valve Body and ATF Strainer Installation . 14-342
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Mainshaft Bearing and Oil Seal
Replacement . 14-308
Countershaft Bearing Replacement . 14-309
Secondary Shaft Bearing Replacement . 14-310
Selector Control Shaft Oil Seal Replacement . 14-311 .................
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Mainshaft Disassembly,
Inspection, and Reassembly . 14-312
Mainshaft 5th Gear Axial Clearance Inspection . 14-313
Countershaft Disassembly, Inspection, and Reassembly . 14-316
Countershaft Reverse Selector Hub and 3rd Gear
Removal . 14-317
Installation . 14-318
Secondary Shaft Disassembly, Inspection, and Reassembly . 14-319
Secondary Shaft Ball Bearing, Idler Gear Removal and Installation . 14-320
Secondary Shaft 2nd Gear Axial Clearance Inspection . 14-321
Secondary Shaft 1st Gear Axial Clearance Inspection . 14-322
Idler Gear Shaft Removal and Installation . 14-324
Idler Gear/Idler Gear Shaft Replacement . 14-325
Clutch Disassembly . 14-326
Clutch Inspection . 14-330
Clutch Wave-plate Phase Difference Inspection . 14-331
Clutch Clearance Inspection . 14-332
1st, 2nd, and 3rd Clutch Reassembly . 14-335
4th and 5th Clutch Reassembly . 14-338
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Component Location Index
. 14-355
Backlash Inspection . 14-356
Differential Carrier and Final Driven Gear Replacement . 14-356
Carrier Bearing Replacement . 14-357
Oil Seal Replacement . 14-358
Carrier Bearing Outer Race Replacement . 14-359
Carrier Bearing Preload Inspection . 14-362
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