Acura CSX. Instruction — page 155

YES

NO

YES

NO

YES

NO

11-293

18. Monitor the OBD STATUS for DTC P2649 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 17,
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, keep
idling until a result comes on.

19. Reconnect all connectors.

20. 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).

21. Start the engine, and let it idle.

22. 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 21. If the ECM/PCM was substituted,
go to step 1.

Go to step 23.

23. Monitor the OBD STATUS for DTC P2649 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 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 21. If the ECM/
PCM was substituted, go to step 1. If the screen
indicates NOT COMPLETED, keep idling until a
result comes on.

Does the scr een indicate PASSED?

Is DT C P2649 indicated?

Does the scr een indicate PASSED?

08/08/21 14:28:27 61SNR030_110_0293

01

02

03

01

SNR9A00A14680463365FJAT00

Closed

Open

11-294

VTEC/VTC

VTC Oil Control Solenoid Valve Removal/Test/Installation

A

C

B
12 N·m
(1.2 kgf·m,
8.7 lbf·ft)

A

VTC OIL CONTROL SOLENOID VALVE 2P CONNECTOR

BATTERY

A

1.2 mm
(0.05 in.)

1. Disconnect the VTC oil control solenoid valve 2P

connector.

2. Remove the ground wire (A).

3. Remove the bolt (B) and the VTC oil control

solenoid valve (C).

4. Check the VTC oil control solenoid valve strainer

for clogging. If the strainer is clogged, replace the
VTC oil control solenoid valve.

5. Note the amount of valve opening by observing the

position of the piston shoulder (A) through the
valve retard drain port. If you see the shoulder of
the piston, the valve is open and must be replaced.

6. Connect the battery positive terminal to VTC oil

control solenoid valve 2P connector terminal No. 2.

7. Connect the battery negative terminal to VTC oil

control solenoid valve 2P connector terminal No. 1.
Appearance of inner valve (A) in the port should be
at least 1.2 mm (0.05 in.). If the inner valve does not
open, replace it; then go to step 8.

Terminal side of male terminals

08/08/21 14:28:28 61SNR030_110_0294

05

01

SNR9A00A14680416081KBAT10

11-295

11-295

CMP Sensor A Replacement

12 N·m
(1.2 kgf·m, 8.7 lbf·ft)

A

12 N·m
(1.2 kgf·m,
8.7 lbf·ft)

B

C

A

8. Remove the VTC valve O-ring (A).

9. Coat a new O-ring with new engine oil, then install

it on the valve.

10. Clean and dry the mating surface of the valve.

11. Install the valve.

NOTE: Do not install the valve while wearing cloth
fibrous gloves. Be careful not to contaminate the
cylinder head opening.

1. Remove the air cleaner (see page 11-345).

2. Disconnect CMP sensor A 3P connector (A).

3. Remove CMP sensor A (B) from the intake

camshaft side of the cylinder head.

4. Install the parts in the reverse order of removal

with a new O-ring (C).

08/08/21 14:28:28 61SNR030_110_0295

05

01

SNR9A00A14680416081KBAT10

11-295

11-295

CMP Sensor A Replacement

12 N·m
(1.2 kgf·m, 8.7 lbf·ft)

A

12 N·m
(1.2 kgf·m,
8.7 lbf·ft)

B

C

A

8. Remove the VTC valve O-ring (A).

9. Coat a new O-ring with new engine oil, then install

it on the valve.

10. Clean and dry the mating surface of the valve.

11. Install the valve.

NOTE: Do not install the valve while wearing cloth
fibrous gloves. Be careful not to contaminate the
cylinder head opening.

1. Remove the air cleaner (see page 11-345).

2. Disconnect CMP sensor A 3P connector (A).

3. Remove CMP sensor A (B) from the intake

camshaft side of the cylinder head.

4. Install the parts in the reverse order of removal

with a new O-ring (C).

08/08/21 14:28:28 61SNR030_110_0295

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