11. EFI SYSTEM MXU 450i
11-10
TPS/ISC RESET
● If close or open the throttle grip randomly,
the ECU may record the incorrect TPS when
the ECU or the throttle body has been
reinstalled. It can cause hard to start engine
or idling speed is not smooth when engine
installation.
● ISC has a motor inside, which controls ISC
valve to obtain smooth idling speed. The
ECU may record the incorrect ISC position
during the engine speed isn’t working when
the ECU or the throttle body has been
reinstalled. It can cause engine stop, hard to
start engine or rough idling speed.
The throttle position sensor (TPS) and idle air
bypass valve (ISC) have to be reset when the
throttle body, T-MAP, TPS, ISC or ECU has
been reinstalled.
TPS/ISC RESET PROCEDURE
Start the engine till engine temperature to
85°C over on idle condition.
ECU will learn engine new condition
automatically.
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