Fuel Shut-Off

Fuel Shut-Off







Fuel shut-off will take place if any of the following criteria are fulfilled:
^ +15 supply missing
^ fully depressed accelerator pedal during starter motor cranking
^ engine speed above (depending on coolant temp.):
^ engine coolant temperature less than 60 degree - over 6300 rpm
^ engine coolant temperature 80 degree - over 6400 rpm
^ air mass/combustion above:
^ B235E: above 1100 mg/c
^ B235R: above 1350 mg/c
^ immobilizer code incorrect
^ throttle rotated manually while engine running
^ major fault in throttle control
^ in case of a pedal sensor malfunction if the engine speed exceeds 2200 rpm
^ ignition discharge module not powered
^ engine speed above 1600 rpm, accelerator pedal fully released and coolant temperature exceeds 20 degree C. This applies in 3rd, 4th and 5th gears on cars with manual gearbox and in 2nd, 3rd and 4th gears on cars with automatic transmission. Injection starts again at 1250 rpm.

Diagnostics
If TWICE fails to send "Immobilizer OFF" when the ignition is turned on or if the Trionic T7, TWICE or MIU control modules have been replaced and the immobilizer code has not been programmed in TWICE, diagnostic trouble code P1460 will be generated and the engine will not start.