controlled area network board

We were givin a can system board with a list of things to do.

The picture above is a picture of the bored we were givin to use
Used an oscilloscope to capture the full pattern of the H-CAN and the L-CAN.The yellow wire is for the L-CAN and the blue wire is for the H-CAN.

I had to capture the data patern where it starts and stops.I did this by hoocking up the one to the blue wire from the H-CAN and hoock the other channel of the oscilloscope to the yellow wire for the L-CAN.

The top line is channel A.This channel is hoocked up to the blue wire H-CAN.The bottom line is channel B.This channel is hoocked up to the yellow wire wich is the L-CAN.The voltage division was 1.0v for both the H-CAN and the L-CAN. with the time on 25micro seconds.The relationship between the two patterns is  the base voltage is same thats why they are the same over eachother.The voltage is 2.5v.As the H-CAN is switche above 2.5v the L-CAN mocks this switching with an equal yet opposite voltage from the base voltage.

I was told to capture the paterns of the folowing inputs inputs:
Right indicator
Left indicator
Rear wiper
Stop lights
Fuel pump
Reverse lights

Right indicator

Left indicator

Stoplights

reverse light

In all the patterns above the voltage division was 1.0v for the H-CAN and 1.0v for the L-CAN and the time was on 25 micro seconds.This is the same as that of the original can.As we can see all the paterns shown above are alot differnt than the origal CAN the reason for this is because they all have to send out a different signal to know what has to turn on and when it has to turn on.The code is the amount of zeros.This changes with the different patterns.

rear wipers:

fuel pump:

the pictures above I got from:
http://amirs4825.blogspot.com/2010/11/controlled-area-network-board.html.

the reason I took his is because I didnt take picture when I did it

I used the Wiring diagram above to identify the inputs and outputs relays or transistors and wire pins and colours for the right hand indicator.

Right hand indicator indicator= 7-6
input voltage pin 7- tock I pin6 then output signal from RB2/can tx and Rb3/canRx to pins 1  and 2  then the output pins 7 CAN-H and 6 CANL to Ic4 and Can-L to can receiver IC5 and then the output pins TxD to TXCAN/TXRXCAN and RXD to RXCAN/NC and from the outputs GP4/REF and then to OPTOC coupling which switches the transistor which responds to light from the LED which then switches another transistor on which then finally switches the right hand indicator on.That is the whole proces of how the right hand indicator turns on did this by folowing the diagrame shown above.
Using the diagram I had to identify both the voltage regulator that resemble the one we built in ttec4824.They are similar because they change the voltage from a 12v supply to a 5v.Pin 1 and 2 input U2 7805 Pin 14 VDD.