Advanced Diagnostics

Advanced Diagnostics - DTC P2654: Rocker Arm Oil Control Solenoid B (Exhaust Valve Side) Circuit High Voltage






General Description
The VTEC system activates the rocker arm oil control solenoid B by command from the powertrain control module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between low and high. If the return signal is ON (high) when the PCM outputs the OFF (low) signal to the rocker arm oil control solenoid B, 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 ON (high) for at least 2.0 seconds when the PCM outputs the OFF (low) signal to the rocker arm oil control solenoid B.

Driving Pattern
1. Start the engine, and let it idle for at least 10 seconds.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

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.