Category: Technical Guide
Setting the Stepper Motor
Credit Roger CarpenterClassic Mini NLA: Rare & Alternative parts The Stepper Motor is also sometimes called the Idle Air Control Valve (IACV or just IAC)MemsFCR will show the steps returned by IAC. What does...
Rover Service Communications Protocol (ROSCO)
Protocol The ECU’s diagnostic port uses a serial protocol, with 8 data bits, no parity, and 1 stop bit, running at 9600 bps. When a diagnostic tool (or a PC running diagnostic software) is...
What is the Carbon Canister Purge Valve
The carbon canister stores fuel vapours until the CFSV is actuated by MEMS. CFSV activation occurs when the engine temperature is above 70°C, the engine speed above 1500 rpm and the MAP sensor returns...
Fuel Trims as a Diagnostic Aid
The concept of fuel trims, and how an ECU uses fuel trims to maintain a stoichiometric balance between fuel and air on petrol engines is probably among the least understood aspects of modern engine...
