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I have the Volvo Wiring Diagram manual for 1987 240.
It has the same ( I think) schematic that Haynes copied, but in three colors so that it can be read. It also have pictorial diagrams of the various systems for the entire car.
I understand that manuals can be downloaded from the Volvo company site, but I don't know the details of how to do that.
Here are some things from the LH 2.2 diagram that might help.
ECU Pin #1 is green, goes to pin #8 on the ignition control module.
#2 is blue, goes to the engine temp sender.
#3 is orange, goes to pin #2 on the throttle position switch.
#4 is not shown on my pictorial.
#5 is brown-black, connects to green from #20, which changes to black at a connector and connects to the oxygen sensor.
#6 is green-yellow, goes to air mass meter pin #2
#7 is white-red, goes to air mass meter pin #3
#8 is white, goes to air mass meter pin #4
#9 is brown, goes to the fuel pump relay pin #87/1
#10 is brown-white, goes to idla air control pin #3
#11 is to, a brown-black which goes to a ground, and black which goes to a connector which looks like a test point.
#12 is Blue-white, goes to throttle position switch Pin #3.
#13 is green-white, goes to each injector and to fuel pump relay pin #87/2
#14 is yellow, goes to air mass meter pin #6
#15 is not used.
#16 is red, goes to a/c relay and thence D+/61 alternator.
#17 is blue-green, goes to fuel pump relay Pin #86/2
#18 is two red-black, one to fuel pump relay pin #85, one to ignition switch pin #15
#19 is black, goes to same connector as the one from pin #11.
#20 is green, goes to air mass meter, see also pin #5
#21 is yellow-black, goes to fuel pump relay pin #86/1.
#22 is P, (whatever that is) goes to the test point near the igniiton cil.
#23 is green-red, goes to idle air control pin #5.
#24 is not shown on my diagram.
#25 is black, goes to a ground.
That is all I can provide. I hope it is helpful.
Good Luck,
Bob
:>)
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