Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2010CROSSTOUR 2WD V6-3.5LREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP2648ADVANCED DIAGNOSTICS
2010 Honda Crosstour 2WD V6-3.5L
Advanced Diagnostics
2010 Honda Crosstour 2WD V6-3.5LSECTION Advanced Diagnostics
Advanced Diagnostics - DTC P2648: Rocker Arm Oil Control Solenoid A (Bank 1) Circuit Low Voltage
General Description
The variable cylinder management (VCM) system switches the valve timing by opening and closing the oil groove to the cam switching mechanism. The oil groove is opened and closed by the rocker arm oil control solenoid, and the powertrain control module (PCM) controls the VCM system via the rocker arm oil control solenoid. The PCM outputs the signal and monitors the PCM output terminal voltage level. When an abnormal condition continues for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Enable Conditions
Malfunction Threshold
The return signal is OFF (low) for at least 1.0 second when the PCM outputs the ON (high) signal to rocker arm oil control solenoid A (bank 1).
Confirmation Procedure with the HDS
Do the VTEC TEST in the INSPECTION MENU with the HDS.
Driving Pattern
1. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.
2. Drive the vehicle in a lower gear at 3,300 rpm or more for at least 10 seconds.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.
General Description
The variable cylinder management (VCM) system switches the valve timing by opening and closing the oil groove to the cam switching mechanism. The oil groove is opened and closed by the rocker arm oil control solenoid, and the powertrain control module (PCM) controls the VCM system via the rocker arm oil control solenoid. The PCM outputs the signal and monitors the PCM output terminal voltage level. When an abnormal condition continues for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Enable Conditions
Malfunction Threshold
The return signal is OFF (low) for at least 1.0 second when the PCM outputs the ON (high) signal to rocker arm oil control solenoid A (bank 1).
Confirmation Procedure with the HDS
Do the VTEC TEST in the INSPECTION MENU with the HDS.
Driving Pattern
1. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.
2. Drive the vehicle in a lower gear at 3,300 rpm or more for at least 10 seconds.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.