Plug 1 is H-CAN. H-CAN is when the signal is positively switched.
Plug 2 is L-CAN. L-CAN is when the signal is earth switched.
Plug 3 is earth.
Normal
Right Indicator
Left indicator
Rear wiper
Stoplights
Fuel pump
Reverse lights
Identifying the input/output pins, Relay or transistor for the right hand indicator and rear wiper.
Right hand indicator:
Input 7
Output 5
Transistor
Rear wiper:
Input 9
Output 7
Relay
Identifying the voltage regulators and the inputs/outputs for them.
Regulator 1:U17805 on node A
Input supply 1 and 2
Output to Ve which is voltage supply for IC 18F258
Regulator 2:U17895 on node B
Input supply 1 and 2
Output to 14 VDD
Stop light circuit.
Node A input 5
RA2/AN2/Vref-
This sends out a specific signal to the CAN-H
The CAN-H goes through the connector to the Node B CAN module.
Which sends the signal to the IC.
The IC sends the appropriate signal to the correct circuit.
which is output circuit 3, this sends voltage to the photo diode, which passes the voltage onto the base of the transmitter which activates the stop lights.
On your oscilloscope pattens you were asked to identify were the pattern changes with each input. Also the explanation of the circuits for the indicator, rear wiper,voltage regulator and stop circuit is not at the required level.
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