Acura CSX. Manual — part 156

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11-296

11-296

VTEC/VTC

Rocker Arm Oil Control Valve
Removal/Installation

Rocker Arm Oil Pressure Switch
Removal/Installation

D

E

C
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)

A

B

B
22 N·m
(2.2 kgf·m, 16 lbf·ft)

12 N·m
(1.2 kgf·m, 8.7 lbf·ft)

A

C

1. Remove the cowl cover and the under-cowl panel

(see page 20-163).

2. Disconnect the rocker arm oil control valve 2P

connector (A) and the rocker arm oil pressure
switch 2P connector (B).

3. Remove the bolts (C).

4. Remove the rocker arm oil control valve (D).

5. Install the parts in the reverse order of removal

with a new solenoid valve filter (E).

1. Remove the rocker arm oil control valve (see page

11-296).

2. Remove the cover (A).

3. Remove the rocker arm oil pressure switch (B).

4. Install the parts in the reverse order of removal

with a new O-ring (C).

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11-297

Idle Control System

Component Location Index

ALTERNATOR

A/C PRESSURE SENSOR

A/C COMPRESSOR
CLUTCH RELAY

A/C COMPRESSOR

ENGINE CONTROL MODULE (ECM)/
POWERTRAIN CONTROL MODULE (PCM)

BRAKE PEDAL POSITION SWITCH

Signal Circuit Troubleshooting,

page 11-307

Signal Circuit

Troubleshooting,
page 11-306

Update, page 11-227
Substitution, page 11-7
Replacement, page 11-228

* : This illustration shows K20Z2 engine

Signal Circuit Troubleshooting,

page 11-308

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−

−

−

−

−

−

DTC P0506:

YES

NO

YES

NO

YES

NO

11-298

Idle Control System

DTC Troubleshooting

Idle Control System RPM Lower

Than Expected

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. Check under these DATA LIST conditions with the

HDS:

• ECT SENSOR 1 above 70 °C (156 °F)
• IAT SENSOR above 0 °C (32 °F)
• VSS is 0 km/h (0 mph)
• ST FUEL TRIM between 0.69

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, keep idling
until a result comes on. If the screen indicates OUT
OF CONDITION, go to step 4 and recheck.

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

K20Z2 engine (see page 11-348), K20Z3 engine
(see page 11-349).

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

bore.

If there is dirt or carbon, clean the throttle

body (see page 11-344). Also check for damage to
the air cleaner element (see page 11-346), then go
to step 9. If there is damage in the throttle bore, go
to step 8.

Check the A/C system or the charging system,

then go to step 9.

8. Replace the throttle body; K20Z2 engine (see page

11-348), K20Z3 engine (see page 11-349).

9. Reset the ECM/PCM with the HDS.

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

11-310).

11. 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.

12. Check under these DATA LIST conditions with the

HDS:

• ECT SENSOR 1 above 70 °C (156 °F)
• IAT SENSOR above 0 °C (32 °F)
• VSS is 0 km/h (0 mph)
• ST FUEL TRIM between 0.69

1.47

• FSS is CLOSED

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

Go to step 19.

Go to step 14.

Does the scr een indicate F AILED?

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

Is DT C P0506 indicated?

08/08/21 14:28:31 61SNR030_110_0298

−

−

−

−

−

−

−

−

−

−

−

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

11-299

14. Monitor the OBD STATUS for DTC P0506 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, go to step 19. If

the screen indicates EXECUTING, keep idling until
a result comes on. If the screen indicates OUT OF
CONDITION, go to step 11.

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

K20Z2 engine (see page 11-348), K20Z3 engine
(see page 11-349).

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

bore.

If there is dirt or carbon, clean the throttle

body (see page 11-344). Also check for damage to
the air cleaner element (see page 11-346), 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, change the gear position, etc.).

18. Monitor the OBD STATUS for DTC P0506 in the

DTCs MENU with the HDS.

Intermittent failure, the system is OK at this

time.

If the screen indicates FAILED, check the A/C

system and/or the charging system, then go to step
1 and recheck. If the screen indicates EXECUTING,
keep idling until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 17.

19. 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).

20. 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.

21. Check under these DATA LIST conditions with the

HDS:

• ECT SENSOR 1 above 70 °C (156 °F)
• IAT SENSOR above 0 °C (32 °F)
• VSS is 0 km/h (0 mph)
• ST FUEL TRIM between 0.69

1.47

• FSS is CLOSED

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

Check for poor connections or loose

terminals at the throttle body and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then go to step 20.
If the ECM/PCM was substituted, go to step 1.

Go to step 23.

23. Monitor the OBD STATUS for DTC P0506 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 22, go to the indicated
DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the throttle body
and the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see page 11-7),
then go to step 20. If the ECM/PCM was substituted,
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 20.

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?

Is DT C P0506 indicated?

Does the scr een indicate PASSED?

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