Derbi Rambla 250 Manual page 179

Injection
On the interface wiring with the control unit side
connector disconnected and the coolant tempera-
ture sensor connector connected, check the re-
sistance values between pins 9 and 26 in relation
to the engine temperature.
20° = 2500 ± 100 Ω
80° = 308 ± 6 Ω
With the control unit side connector disconnected
and the coolant temperature connector discon-
nected, check the insulation between the two Sky
Blue-Red and Blue-Green cables
With the control unit side connector disconnected
and the coolant temperature sensor connector dis-
connected, check the continuity of the Orange
cable between pin 9 of the interface wiring and the
pin 3 of sensor connector, and the continuity be-
tween pin 26 of the interface wiring and pin 1 of
sensor connector
Specific tooling
AP8181059 Control unit interface wiring
Zeroing the throttle
Throttle valve position signal reset (TPS reset)
The MIU control unit is supplied with throttle valve position sensor and is pre-calibrated.
Pre-calibration entails regulating the minimum opening of the throttle valve to obtain a specific air flow
under pre-set reference conditions.
Pre-calibration ensures optimal air flow for the control of the idle speed.
This regulation must not be tampered with in any way whatsoever.
The injection system will complete the management of the idling through the Stepper and the variation
of the ignition advance.
INJEC - 179