Connector "J", Pin# 04 is the wire for the speed sensor on the BCM(Brain Control Module). I only know this from downloading the schematic from Hyundai's web site. I needed this information when I installed my GPS system. Hope this helps you.
There is an output speed sensor located in the lower (looking into the engine bay) right hand side mounted to the transaxle in the front portion on the top just underneath the air cleaner.
right on the other side of the transmission oil pan
its under the skid protector on the right side. in front of the oil pan
IAT - Intake(or incomming) air temperature sensor. It will be located along the air intake tube. It is usually either on the airbox or right after. Before you get to the mass airflow sensor. It usually just is held in the tube by a grommet. Undo the connector and pull it out.
to the right in the engine hiding in a box the stock air intake. The intake box unclips.
The Cam sensor is located at the right rear corner of the cylinder head
Standing in front of the car looking at the engine it should be located on the right side on the rear of the valve cover.
Open the metal covering on the top of your engine. MAP sensor is located on the firewall right in front on you - it is located about 12" to the right of the oil fill cap
It is located inside the timing cover on the right side of the crankgear
Crank Angle Sensor (location)i own a 98 Hyundai accent and the crankshaft position sensor is located just underneath the far right spark plug if your looking from the front of the car,about 5"-8". hope this helps.
The Catalytic converter is located underneath the vehicle right behind the upstream oxygen sensor
The Idle Speed Control actuator is located right behind the air intake plenum