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Acura RSX Honda Integra. Manual - part 155

０１

Ｓ６Ｍ６ＡＡＧＫ７２１０００９０５０５ＦＡＡＴ００

−

DTC P0505:

YES

11-326

Idle Control System

DTC Troubleshooting

Idle Control System Malfunction

(2002-2003 models)

NOTE:

• Information marked with

1 applies to K20A3

engine;

2 applies to K20A2 engine.

• If DTC P1519 is stored at the same time as DTC P0505,

troubleshooting DTC P1519 first, then recheck for
DTC P0505.

1. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

2. Check the engine speed at idle without load

conditions: headlights, blower fan, rear defogger,
radiator fan, and air conditioner off.

Intermittent failure, system is OK at this

time.

If the idle speed is less than 600

(650)

rpm,

go to step 3; if it’s 700

(750)

rpm or higher, go to

step 4.

3. Disconnect the idle air control (IAC) valve 3P

connector.

Check the idle speed with a different load

condition (electrical, A/C, gear position, P/S, etc.)
(see page 11-348). If it’s out of specification, replace
the IAC valve (see page 11-412).

Replace the IAC valve (see page 11-412).

4. Turn the ignition switch OFF.

5. Remove the air intake duct from the throttle body.

6. Start the engine, and let it idle.

7. Put your fingers on the lower port (A) in the throttle

body.

Check the idle speed with a different load

condition (electrical, A/C, gear position, P/S, etc.)
(see page 11-348). If it’s out of specification, replace
the IAC valve (see page 11-412).

Check for vacuum leaks at these parts.

• PCV valve
• PCV hose
• EVAP canister purge valve
• Intake manifold
• Throttle body
• Brake booster hose
• Intake air bypass control thermal valve

Is the engine r unning at 650

( 7 00)

50 r pm?

Does the engine speed incr ease or f luctuate?

Does the engine speed dr op below 7 00

( 7 50)

r pm?

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−

DTC P0506:

YES

11-327

Idle Control System RPM Lower

Than Expected
(2004 model)

NOTE:

• If DTC P0511 is stored at the same time as DTC P0506,

troubleshoot DTC P0511 first, then recheck for DTC
P0506.

• Information marked with

1 applies to K20A3

engine;

2 applies to K20A2 engine.

1. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

2. Check the engine speed at idle without load

conditions: headlights, blower fan, rear defogger,
radiator fan, and air conditioner off.

Intermittent failure, system is OK at this

time.

Go to step 3.

3. Turn the ignition switch OFF.

4. Disconnect the IAC valve 3P connector.

5. Start the engine, and let it idle.

6. Check the engine speed at idle without load

conditions: headlights, blower fan, rear defogger,
and air conditioner off.

Check the idle speed with a different load

condition (electrical, A/C, gear position, P/S, etc.)
(see page 11-348). If it’s out of specification, replace
the IAC valve (see page 11-412).

Replace the IAC valve (see page 11-412).

Is the engine r unning at 650

( 7 00)

50 r pm?

Does the engine speed incr ease or f luctuate?

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−

DTC P0506:

YES

11-328

Idle Control System

DTC Troubleshooting (cont’d)

Idle Control System RPM Lower

Than Expected
(2005-2006 models)

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine, Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

4. Check for these conditions in the DATA LIST with

the HDS.

• Engine coolant temperature above 158 °F (70 °C)
• Intake air temperature above 32 °F (0 °C)
• Vehicle speed is 0 mph (0 km/h)
• ST FUEL TRIM between 0.69 and 1.47
• FSS is CLOSED

5. Monitor the OBD STATUS for DTC P0506 in the

DTCs MENU with the HDS.

Go to step 6.

If the screen indicates PASSED, go to step 15.

If the screen indicates EXECUTING, let the engine
idle until a result comes on. If the screen indicates
OUT OF CONDITION, go to step 4 and recheck.

6. Remove the air intake duct from the throttle body.

7. Check for dirt, carbon, or damage in the throttle

bore.

If there is dirt or carbon, clean the throttle

body (see page 11-403), and also check for damage
at the air cleaner element (see page 11-407), then
go to step 9. If there is damage in the throttle bore,
go to step 8.

Check the A/C system or power steering

system, then go to step 17.

8. Replace the throttle body (see page 11-410).

9. Reset the ECM/PCM with the HDS.

10. Do the ECM/PCM idle learn procedure (see page

11-349).

11. Start the engine, Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

12. Check for these conditions in the DATA LIST with

the HDS.

• Engine coolant temperature above 158 °F (70 °C)
• Intake air temperature above 32 °F (0 °C)
• Vehicle speed is 0 mph (0 km/h)
• ST FUEL TRIM between 0.69 and 1.47
• FSS is CLOSED

Does the scr een indicate F AILED?

Is ther e dir t, car bon, or damage in the thr ottle
bor e?

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−

YES

11-329

13. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0506 is indicated, go to step 1 and

recheck. If any other Temporary DTCs or DTCs are
indicated, go to the indicated DTC’s
troubleshooting.

Go to step 14.

14. Monitor the OBD STATUS for DTC P0506 in the

DTCs MENU with the HDS.

Troubleshooting is complete.

If the screen indicates FAILED, go to step 1

and recheck. If the screen indicates EXECUTING, let
the engine idle until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 12 and
recheck.

15. Remove the air intake duct from the throttle body.

16. Check for dirt, carbon, or damage in the throttle

bore.

If there is dirt or carbon, clean the throttle

body (see page 11-403), and also check for damage
at the air cleaner element (see page 11-407), then
go to step 9. If there is damage in the throttle bore,
go to step 8.

Go to step 17.

17. Recheck with different load conditions (turn on the

headlights, blower motor, rear window defogger
and/or A/C, changing the gear position, etc.)

18. Monitor the OBD STATUS for DTC P0506 in the

DTCs MENU with the HDS.

Intermittent failure, system is OK at this

time.

If the screen indicates FAILED, check the A/C

system and/or power steering system, then go to
step 1 and recheck. If the screen indicates
EXECUTING, let the engine idle until a result comes
on. If the screen indicates OUT OF CONDITION, go
to step 17 and recheck.

Ar e any T empor ar y DT Cs or DT Cs indicated?

Does the scr een indicate PASSED?

Is ther e dir t, car bon, or damage in the thr ottle
bor e?

Does the scr een indicate PASSED?

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