Overview
The inlet air pressure sensor is a new generation sensor and incorporates the inlet air temperature sensor.
The inlet air pressure sensor constantly measures the pressure in the inlet manifold as well as the temperature of the engine inlet air.
It is supplied with +5V by the ECU when the ignition is switched on.
Inlet air...
The ECU is responsible for controlling the "coolant temperature warning" LED when the temperature reaches a critical level (risk of damaging the engine).
To perform this function, a coolant temperature thermocontact switch is used. This is mounted directly into the engine block as it can be more reactive in the event of loss of coolant.
The...
A series of articles on how to recondition a Citroen Saxo MA gearbox.
Through this series of guides I walk you through how I managed to recondition a 20CD22 gearbox with pictures for almost every step of the process and with instructional videos. The guides cover all of the steps needed to fully recondition a gearbox including and overview and...
Overview
The Bosch ME7.4.4 and M7.4.4 ignition-injection ECUs have been developed to control the following functions:
• engine torque,
• sequential multipoint injection,
• twin static ignition,
• cruise control (optional),
• L4 (EOBD)*/K'/ifL5 depollution standards,
• engine cooling,
• dialogue with the other ECUs on the CAN...
Overview
The Bosch ME7.4.4 and M7.4.4 ignition-injection ECUs have been developed to control the following functions:
• engine torque,
• sequential multipoint injection,
• twin static ignition,
• cruise control (optional),
• L4 (EOBD)*/K'/ifL5 depollution standards,
• engine cooling,
• dialogue with the other ECUs on the CAN... 1 Comments
An overview of the cooling system of the Saxo TU3JP (1.4 including VTS) with and without air conditioning.
Figure : b1gp032p
B1GB0GP0
Sensors
2 - Thermal switch temperature sensor lights the temperature warning light at 118 degrees celcius
3 - Temperature sensor for the fuel injection system
4A - Temperature sensor for the cooling... 2 Comments
The ignition is of twin static type: BBC2.2 (Compact Coil Unit and no HT leads).
The compact coil unit consists of 2 coils with 2 HT outputs. It is located directly above the spark plugs.
Each coil consists of a primary winding linked to a secondary winding. Each secondary output is connected to a spark plug. This technology improves ignition...
The injectors are of twin jet type.
They are supplied with +12 V via the double multifunction relay.
The ECU controls the injectors separately by earthing them in the firing order 1-3-4-2 when the inlet valves are closed.
The amount of fuel injected depends on the injector opening time (called the injection time).
Pulses from the...
The engine speed sensor consists of a magnetic core and a winding.
It is positioned opposite a ring on the flywheel with 60 teeth, 2 of which have been removed in order to determine the TDC (top dead centre) position.
When the teeth of the flywheel pass in front of the sensor, a variation in magnetic field is created. This variation...
The throttle potentiometer is located on the throttle housing.
Supplied with +5 V by the ECU, this potentiometer transmits a variable voltage to the ECU which is a function of the position of the throttle (driver's wishes).
This information is used for recognising no load and full load positions and transitories for acceleration,...
