- in this topic we will talk about ECU type Magneti Marelli G7.11 for car Fiat
- description components of ecu
- datasheet for its component
Discription components ECU :
Processor : MC68HCP11A1 TYPE Motorola with 52 pins.
Memory RAM : MHS MM3 65162S0129.
Decoder : PAL-ST B22AF627.
Ignition Coils : driver BU 941 and driver BU 931.
5 VOLT Voltage regulator : L4947R.
Quadruple multidrive
: CA3262 AE.
Datasheet and description Ignition Coils driver BU 931 and BU 941
The picture below
show the location of the tow ignition coil drivers in ECU.
Datasheet drivers BU
931 and BU 941
table description
for pinout Coil A driver - Cylinder N1 and N4
Pin component |
Function |
Base -B |
Firing- comes from the low power transistor |
Collector -C |
Connected to pin n1 of ECU |
Emitter -E |
Wire grounding – connected to ground |
the PNP transistor of low power as shown the picture below is responsible for drive or activate the A driver ignition coil, and with this transistor there is transistor resistor current limiter of 100 Ohms.
table description
for pinout Coil A - Cylinder N2 and N3
Pin component |
Function |
Base -B |
Firing- comes from the low power transistor |
Collector -C |
Connected to pin n19 of ECU |
Emitter -E |
Wire grounding – connected to ground |
Datasheet and description injector drive BDX-53
table description
for pinout BDX-53
Pin component |
Function |
Base -B |
Firing- comes from the low power transistor |
Collector -C |
Connected to pin n18 of ECU |
Emitter -E |
Wire grounding – connected to ground |
Datasheet and description Voltage regulator 5 volts : L4947R
The picture below show the pinout
table description pinout
Pin component |
Function |
Pin number 1 |
In +12V |
Pin number 3 |
Ground |
Pin number 5 |
Out +5V |
Datasheet and description multI drive Quadruple / CA 3262 AE

Table of Drive A - Diagnosis for Solenoid Relay valve 1 and 2
Pin component |
Function |
Pin number 1/3 |
Output A for electrovalve N1 connected to pin 22 of ECU |
Pin number 6 |
Output C for diagnose line connected to pin 4 of ECU |
Pin number 8 |
Output D for electrovalve relay N2 connected to pin 23 of ECU |
Table Drive B for Fuel pump relay and Injection light
Pin component | Function |
Pin number 1 | Output A for relay of feul pump connected to pin 7 of ECU |
Pin number 3 | Output B for injection light
connected to pin 7 of ECU |
Pin number 6 | Output C connected to pin
23 of ECU |
Note: as shown in the following picture below. The check engine light and the fuel pump relay have a diode in series,
Datasheet and description Processor - Motorola TYPE MC68HCP11A1
in this processor
you can see the pinout description in the picture below.