Alfa Romeo Selespeed

Pin-Out CFC 208F functions

Pin-Out CFC 208F functions

Description

1. Power earth
2. Power earth
3. EV4 5-R gear selection actuator control
4. From… 4 to 25… NC
5. Gear selection by lever (+) increase
6. Power supply (+30 battery)
7. Ignition key power supply (15/54)
8. EV3 1-2 gear selection actuator control
9. NC
10. Oil electric pump relay control
11. EV1 1-3-5 odd gears engagement actuator control
12. CAN line (-) with Motronic
13. From.. 34 to 37… NC
14. Gearbox inlet rev sensor (+)
15. Gear engagement sensor position signal
16. Hydraulic group oil pressure sensor signal
17. NC
18. Start relay control
19. EV0 clutch actuation control
20. EV2 2-4-R even gears engagement actuator control
21. CAN line (+) with Motronic
22. From… 46 to 47… NC

1. Engine speed from rev counter (through CCM)
2. K line for diagnostics
3. Gearbox input rev sensor (-)
4. Gear selection potentiometer signal
5. Clutch potentiometer signal
6. From.. 53 to 58… NC
7. Clutch potentiometer earth
8. From.. 60 to 64… NC
9. Gear selection and request reference earth
10. Oil pressure potentiometers sensor earth
11. Gear selection by lever
12. Gear selection by lever
13. Connection for brake (stop) switch
14. From.. 70 to 71… NC
15. Data display control output
16. Gear position sensors power supply (+5V)
17. Gear selection by lever
18. Gear selection (+) (-) from steering wheel switch
19. Engine start +50 signal
20. City switch
21. Connection for door button
22. Clutch position sensor power supply (+5V)
23. Buzzer control

On the CAN line (Pin 33-45) the following signals are available:

Accelerator pedal position, engine torque, water temperature, car speed; whereas CFC 208 uses this line to control the on-board panel display and the torque requests to the engine control when changing gear.

Electrical diagram

CFC 208F Alfa Romeo 147 Selespeed T. Spark electrical diagram

Description

1. Brake pedal switch
2. Rev counter
3. Diagnostics connector
4. Relay
5. Control relay
6. Injection control unit
7. Sectioning connector
8. Starter motor
9. Gear clutch control Selespeed control unit
10. Oil pressure electric pump
11. Gear request buttons on steering wheel
12. Gear selection lever and switches

1. Gear engagement solenoid valves (2)
2. Gear selection solenoid valves (2)
3. Clutch engagement-disengagement solenoid valve
4. Gear selection potentiometer
5. Gear engagement potentiometer
6. Clutch potentiometer
7. Hydraulic group oil pressure sensor
8. Gearbox primary shaft speed sensor
9. Buzzer
10. City automatic gear mode button
11. Door button driver side

Hydraulic circuit oil pressure sensor

It is installed directly on the hydraulic group.

Position of oil pressure sensor

It is installed directly on the hydraulic group. It consists of a capacitive sensitive element that generates a signal processed by a specific custom circuit inside the metal casing. It supplies the control unit CFC 208F with a voltage proportional to the pressure read, with reference to the supply voltage of the sensor. The supply voltage from CFC 208F is 5+/-0.5V with a draw of approx. 10 mA. The maximum pressure value read is approx. 80 bar.

Pressure sensor diagram

Actuators position sensor

Actuators position sensor

The sensors that send the position of the gear selection, gear engagement and clutch control actuators to the Selespeed control unit are single ramp potentiometers installed directly on the electro-hydraulic group. They are powered with 5V+/-0.5V by the control unit CFC 208F. Maximum resistance between pins A-B is 1200 +/- 20Ohmat 20°C.

Location of actuator position sensors

The three sensors, of the same type, installed on the electro-hydraulic group are:

1. Gear selection position sensor
2. Gear engagement position sensor
3. Clutch position sensor

Clutch disk speed sensor (gearbox primary)

This is installed on the gearbox inlet, directly on the gear box.
It is an electromagnetic sensor and sends a sinusoidal signal to the control unit CFC 208F that has a frequency in proportion to the speed of a pinion mounted on the gearbox primary shaft. The winding resistance is 1200 Ohm +/- 10% at 20°C. The air gap ranges between 0.2-1 mm.

Gearbox speed sensor position

Switch on brake pedal

Installed on the brake pedal unit.

Brake pedal switch

When the pedal is released it does not send any signal (NC) to the control unit CFC 208F. When the brake pedal is pressed the BRAKE lights switch on and the switch sends the car braked signal (12V) to control unit CFC 208F.

Door open switch

This reads the information (ON-OFF) regarding the state of the driver side door, sending an earth signal to the control unit CFC 208F when the door is open.

The solenoid valves manage the oil flow to the actuator chambers.
All the valves are the three-way type, they are normally discharged when not controlled.

Proportional pressure solenoid valves (EV1 and EV2)

These control the oil pressure at the two chambers of the gear engagement-disengagement double-action actuator that has three set mechanical positions according to the control combination (even number gear, idling, odd number gear). The maximum flow rate is 7 l/min with pressure differential of 10 bar. The control current ranges from 0 to 2.5 A directly controlled by control unit CFC 208F. Electrical resistance of the winding is 2.5 Ohm +/- 6% at 20°C.

Position of solenoid valves and current pressure diagram

ON/OFF solenoid valves ( EV3 and EV4)

These feed the oil flow to the two chambers of the double action gear selection actuator that has only two set mechanical positions (1-2 and 5-R). The maximum flow rate is 1.4l/min with pressure differential of 10 bar. They are controlled with a voltage of 12V directly from control unit CFC 208F and absorb approx. 2A.
Electrical resistance of the winding is 5.1 Ohm +/-6% at 20°C.

On-Off solenoid valve position

Solenoid valves and actuators

The solenoid valves manage the oil flow to the actuator chambers.
All the valves are three-way; they are normally discharged if not controlled.

Proportional flow-rate solenoid valve (EV0)

It controls the oil inlet and outlet flow of the clutch stroke actuator chamber (single action).
The maximum flow rate is 10l/min with pressure differential of 10 bar. The control current ranges from 0 to 2A directly controlled by control unit CFC 208F. Electrical resistance of the winding is 2.5 Ohm +/- 6% at 20°C.

Solenoid valve position and flow rate/current diagram