Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- VIS control solenoid valve malfunction - Open circuit in wiring between main relay and VIS control solenoid valve - Open circuit in wiring between VIS control solenoid valve and PCM - Short to ground in wiring between VIS control solenoid valve and PCM - Poor connection at VIS control solenoid valve or PCM connector - PCM malfunction

Description

PCM monitors VIS control solenoid valve control signal at PCM terminal 4R. If PCM turns VIS control solenoid valve off but voltage at PCM terminal 4R still remains low, PCM determines that VIS control solenoid valve circuit has malfunction. Mazda RX8 Solenoid Location