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Acura CSX. Manual - part 154

−

０１

ＳＮＲ９ＡＡ７Ｋ７２１０００９２６４８ＦＡＡＴ３０

−

YES

DTC P2648:

11-289

ROCKER ARM OIL CONTROL SOLENOID 2P CONNECTOR

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

Check for poor connections or loose

terminals at the rocker arm oil pressure switch and
the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see page 11-7),
then go to step 24. If the ECM/PCM was substituted,
go to step 1.

Go to step 26.

26. Monitor the OBD STATUS for DTC P2647 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 25, go to the indicated
DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the rocker arm oil
pressure switch and the ECM/PCM. If the ECM/PCM
was updated, substitute a known-good ECM/PCM
(see page 11-7), then go to step 24. 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).

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Do the VTEC TEST in the INSPECTION MENU with

the HDS.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at the rocker arm oil control solenoid and the ECM/
PCM.

Go to step 4.

4. Turn the ignition switch to LOCK (0).

5. Disconnect the rocker arm oil control solenoid 2P

connector.

6. At the solenoid side, measure the resistance

between rocker arm oil control solenoid 2P
connector terminals No. 1 and No. 2.

Go to step 7.

Go to step 10.

Rocker Arm Oil Control Solenoid

Circuit Low Voltage

Terminal side of male terminals

Is DT C P2647 indicated?

Does the scr een indicate PASSED?

Is the r esult OK ?

Is ther e 14

at r oom temper atur e?

08/08/21 14:28:26 61SNR030_110_0289

０２

−

YES

11-290

VTEC/VTC

ECM/PCM CONNECTOR B (44P)

VTS (GRN/YEL)

7. Jump the SCS line with the HDS.

8. Disconnect ECM/PCM connector B (44P).

9. Check for continuity between ECM/PCM connector

terminal B34 and body ground.

Repair short in the wire between the ECM/

PCM (B34) and the rocker arm oil control solenoid,
then go to step 11.

Go to step 18.

10. Replace the rocker arm oil control valve (see page

11-296).

11. Reconnect all connectors.

12. Turn the ignition switch to ON (II).

13. Reset the ECM/PCM with the HDS.

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

11-310).

15. Do the VTEC TEST in the INSPECTION MENU with

the HDS.

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

Check for poor connections or loose

terminals at the rocker arm oil control solenoid and
the ECM/PCM, then go to step 1.

Go to step 17.

17. Monitor the OBD STATUS for DTC P2648 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 16,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the rocker arm oil
control solenoid and the ECM/PCM, then go to step
1. If the screen indicates NOT COMPLETED, go to
step 15.

18. Reconnect all connectors.

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. Do the VTEC TEST in the INSPECTION MENU with

the HDS.

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

Check for poor connections or loose

terminals at the rocker arm oil control solenoid 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 22.

Terminal side of female terminals

Is ther e continuity?

Is DT C P2648 indicated?

Does the scr een indicate PASSED?

Is DT C P2648 indicated?

08/08/21 14:28:26 61SNR030_110_0290

−

０１

ＳＮＲ９ＡＡ７Ｋ７２１０００９２６４９ＦＡＡＴ３０

−

YES

DTC P2649:

11-291

ROCKER ARM OIL CONTROL SOLENOID 2P CONNECTOR

22. Monitor the OBD STATUS for DTC P2648 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 21, go to the indicated
DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the rocker arm oil
control solenoid 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 NOT COMPLETED, go to step 20.

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 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 rocker arm oil control solenoid and the ECM/
PCM.

5. Turn the ignition switch to LOCK (0).

6. Disconnect the rocker arm oil control solenoid 2P

connector.

7. At the solenoid side, measure the resistance

between rocker arm oil control solenoid 2P
connector terminals No. 1 and No. 2.

Go to step 8.

Go to step 12.

Rocker Arm Oil Control Solenoid

Circuit High Voltage

Terminal side of male terminals

Does the scr een indicate PASSED?

Is DT C P2649 indicated?

Is ther e 14

at r oom temper atur e?

08/08/21 14:28:27 61SNR030_110_0291

０２

０３

−

YES

11-292

VTEC/VTC

GND (BLK)

ROCKER ARM OIL CONTROL SOLENOID
2P CONNECTOR

ROCKER ARM OIL CONTROL SOLENOID 2P CONNECTOR

ECM/PCM CONNECTOR B (44P)

VTS (GRN/YEL)

8. Check for continuity between rocker arm oil control

solenoid 2P connector terminal No. 1 and body
ground.

Go to step 9.

Repair open in the wire between the rocker

arm oil control solenoid and G101; A/T model
(see page 22-16), M/T model (see page 22-18), then
go to step 13.

9. Jump the SCS line with the HDS.

10. Disconnect ECM/PCM connector B (44P).

11. Check for continuity between ECM/PCM connector

terminal B34 and rocker arm oil control solenoid 2P
connector terminal No. 2.

Go to step 19.

Repair open in the wire between the ECM/

PCM (B34) and the rocker arm oil control solenoid,
then go to step 13.

12. Replace the rocker arm oil control valve (see page

11-296).

13. Reconnect all connectors.

14. Turn the ignition switch to ON (II).

15. Reset the ECM/PCM with the HDS.

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

11-310).

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

Check for poor connections or loose

terminals at the rocker arm oil control solenoid and
the ECM/PCM, then go to step 1.

Go to step 18.

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is DT C P2649 indicated?

08/08/21 14:28:27 61SNR030_110_0292

Content .. 152 153 154 155 ..