Thread: Do P12 20v coil plugs have built in ignition modules?

I'm planning to use the 20v CAS and plugs that originally came with my motor, and trying to figure out if it has the ignitor on the plugs or if i have to use an external one. anyone with experience care to help out...

they are 3 wire just like vet and s15 coils. no external igniter needed.

22448-91F00- COIL ASSY-IGNITION P12,S15,T30 exact part code match for S15, i.e they are S15 coils and vice versa.

What would you have to do when mounting these and a CAS on a regular VE? Removal of dizzy? And then what else? Where does the CAS mount?

For one thing, if you're not going aftermarket ECU, your ECU needs to support coil on plug setup rather than a distributor and single coil setup, so that means basically using a RWD Silvia ECU. I'm not sure if the CAS output matches that of a RWD car either so that might not even work in the end.

Its a setup that will require some legwork/research to be done.

The CAS replaces the dizzy (the stock dizzy has the CAS in the base).

thanks for the help guys. i'm running a haltech platinum 1000 ems now. unfortunately scott from haltech is not familiar with the p12 plugs so didn't know whether the ignitor was built in or not.

Calum RTv2 ^_^.

I'm actually trying to find out the same exact thing. I just assumed that since they were 3-wire COP that they had a built in ignitor (power transistor) but I'm told that might not be the case, as I think S13 COP has 3-wires but also has external ignitors (or so I'm told).

I'd love to see the ignition wiring diagram of an S15, or 20V or VET.

S15 coils have the built in ignitor and are 4 wire. The 3 wire coils just have a secondary ground that connects to the back of the head. Dont really know its purpose other than to maybe protect from surging or eliminate a pulsing effect from the coil. They still need to be used with an ignitor or some other means of firing them such as the ecu itself if your using an EMS.

The S15 coils are known to go out because of the built in ignitor. The extra heat from being on the motor itself under the cover gets them pretty hot. Alot of people say not to go on long road trips with an s15 sr powered 240 because the coils will overheat and take a dump. Usually on 4+ hr trips from what ive read.

SR20VE 20V ECU Pinout.

1 --
2 O2 sensor heater control signal
3 --
4 --
5 --
6 --
7 --
8 --
9 VVL solenoid control signal
10 --
11 --
12 Fuel consumption monitor output signal
13 Kyanisutapajikontororubarubu control signal
14 --
15 --
16 Variable intake control signal Dakutokontororusorenoido
17 --
18 engine warning light
19 --
20 ECCS & IGN coil relay control signal
21 No.1cyl. Ignition signal (drive signal Pawatora)
22 No.2cyl. Ignition signal (drive signal Pawatora)
23 No.3cyl. Ignition signal (drive signal Pawatora)
24 No.4cyl. Ignition signal (drive signal Pawatora)
25 --
26 Air conditioning relay control signal
27 Rajietafanrire one control signal (Hi)
28 --
29 --
30 --
31 --
32 Temperature output signal (meter C / U, to Otoeakonanpu)
33 --
34 --
35 --
36 Tachometer drive signal
37 Rajietafanrire two control signals (Low)
38 Fyueruponpurire control signal
39 --
40 stop lamp SW signal
41 Key SW (START) signal
42 (IGN) key SW (IGN) signal
43 neutral signal SW
44 air-conditioned signal SW
45 --
46 --
47 --
48 --
49 --
50 (KLINE) K Line (C / U data transmission)
51 --
52 Electrical load signal SW
53 --
54 --
55 SW Buroafan signal
56 --
57 --
58 ground sensors
59 (-) C / U ground
60 (-) C / U ground
61 --
62 crank angle sensor 1 ° (POS) signal
63 Speed signal
64 Accelerator sensor power 2
65 Power sensor
66 Battery power
67 --
68 --
69 --
70 acceleration sensor ground 2
71 crank angle sensor 180 ° (REF) signal
72 Eafurometa signal
73 throttle sensor signal 1
74 throttle sensor signal 2
75 Accelerator sensor signal 1
76 Accelerator sensor signal 2
77 --
78 --
79 --
80 Eafurometaasu
81 crank angle sensor 180 ° (REF) signal
82 Knock sensor signal
83 Refrigerant pressure sensor signal
84 hydraulic power steering sensor signal
85 --
86 --
87 --
89 --
90 --
91 --
92 O2 sensor signal
93 temperature sensor signal
94 --
95 --
101 No.1cyl. Injector drive signal
102 No.2cyl. Injector drive signal
103 No.3cyl. Injector drive signal
104 No.4cyl. Injector drive signal
105 --
106 Injekutaasu
107 --
108 Injekutaasu
109 C / U Power
110 --
111 C / U Power
112 Surottorumotarire control signal
113 Throttle motor power
114 throttle motor drive signal 1 (signal open)
115 Surottorumotaasu
116 throttle motor drive signal 2 (closing signal)