VVC Information

The S1 EU2 VVC is controlled by the Lucas MEMS 2J ECU common with the early VVC MGFs

The S2 EU3 VVC is controlled by the Lotus K4 ECU (based on the Lucas MEMS 3)

VVC Failure Modes

ECT Sensor Error Limits to 6K RPM

MAP Sensor Error limits to 6K RPM

VVC Solenoid low resistance (should be 6.6 to 8.8 Ohms)Limits to 5.5K RPM

Cam Position Sensor Limits to 5.5K RPM

Note: Connecting the battery on wrong polarity can blow the ECU VVC control circut, as can running with a low resistance solenoid. Clearly the circuit has no protection.

Lotus S2 K4 ECU VVC Connections

K4 Pin

Wire

06

Blue

10

Green Orange

12

Black Yellow

49

Brown Black

} Lotus S2 K4 ECU VVC DTC Codes

Code

P1336

P1480

P1481

P1490

P1491

P1492

P1493

P1494

P1495

External Resources VVC Sensors * http://homepage.swissonline.ch/TomsSeven/Navigation2/Map.htm VVC Sensors * http://www.mgfcar.de/sensor/index.htm VVC MEMS 2J Description * http://www.mgfcar.de/library/ENGINE_MANAGEMENT_SYSTEM_VVC_MEMS_2J.htm VVC Mechanism Assembly * http://www.davebence.co.uk/mods_10.htm VVC Timing * http://forums.mg-rover.org/showthread.php?p=1940938