How To: Nova C20xe Wiring
Right, hope I haven't forgotten any wires here, otherwise be pretty useless
This is for a DISTRIBUTOR C20XE, the dispacks are identical apart from they have on more plug for the dipack unit.
Maybe make this a sticky seeing as its a common topic/problem?
ALL WIRES/PLUGS ARE BLACK UNLESS STATED OTHERWISE
WIRES FROM THE DIAGRAM:
1- This is the wire which goes to the fuel pump, the fuel pump live. It is blue with a red trace, as illustrated.
2- This is the Fuel Pump Relay, they have a few wire going into them and only one coming out which is item 1 on the diagram
3- This is the big plug which goes into the ECU, It has a silver clip which you push down to secure the plug into the ECU, these can be tricky to master the first few times you do them!
4- These are the dash signal plugs, out of these two you will use the following wires:
BLUE- Temperature Display for Dash, to BLUE on Nova dials
BROWN with BLUE trace- ECU warning light, colour for colour on injection Nova dials/Digidash, unless it was a carb model, in which case, use the choke light as a ECU light, which is BROWN with YELLOW trace
GREEN- Tachometer (rev counter) goes to GREEN on nova dials
5- This is the gromet bung which is where the wires will go trhough to the inside of the car through a 60mm hole you drill in the bulkhead. TIP: you need to cut the tape holding the bung in place and slide it down towards the ECU plug for a better fitment
6- This is the Permanent live for the ECU, it is a red wire, in a black sheafing, it should have a ring terminal on the end, it goes to the positive side of the battery
7- this is the three pin plug for the Lambda Sensor, the line going through indicates that the plug should be around here somewhere.
8- This is the plug for the Air Flow Meter (Commonly known as AFM) Think it has 7 pins?
9- This is the coolant temperature wire, it is blue and simply pushes onto the nipple next to the Coolant Temperature Switch.
10- This is a blue plug with 2 pins, it goes to the coolant temperature switch sensor (commonly known as CTS Sensor). This is located at the front of the block by the top rad hose
11- This is the Crank Position Sensor,, it goes in the lower front face of the block, it is held in by one bolt. The line further up the loom towards the ECU indicates a plug for it
12- This Plug goes into the Hall Sensor on top of the distributor, it has 3 pins, you really cant miss this one!
13- This plug goes into the coil.
14- This is the switched live (a.k.a. Ignition Live). This should go to a 12V igtion live source, this will turn the ECU on and off with the ignition.
15- This is a 5 pin (I think?) plug which connects to the back of the block loom. It will be down by the speedo cable drive somewhere. (The loom from the back of the block should include, knock sensor, ICV etc)
16- These are earth, 3 separate wires, one on cambelt end, 2 on gearbox side, they should be earthed to the fuel rail.
17- This is the plug for the Fuel Tank Vent Valve, it is a 2 pin plug. It goes at the very end of the block, usually bolted to the bottom stud of the inlet manifold (gearbox end)
18- This is a plug for the Throttle Position Sensor (TPS) It is located on the cambelt side of the throttle body.
Other Wires
You need an earth that goes from the gearbox to the chassis.
You also need to connect the starter motor live to the +ve side of the battery
From the Nova Engine Loom (found by brake fluid reservoir), you also need to connect the black with red trace to same colour on the engine loom at back for the starter motor. Again from the Nova loom, you need the blue with white trace as the remote wire for alternator, to the same colour on the XE loom. Again for the Oil pressure, you need to connect the blue with yellow trace and blue with green trace to the XE Oil Pressure sender, this is found down behind the Oil Filter.
Hope this of some help to some of you,
Paul
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Originally Posted by Paul
