00 · Hardware

48-pin map

48-way Molex, columns A–M (I skipped), rows 1–4. Looking into the ECU, polarising key at the top. A1 is top-left (CAN High, pin 48). M4 is bottom-right (12 V, pin 1). Typical functions are examples — assign them in TunerStudio.

Looking into ECU · key at topA1 top left · M4 bottom right

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Pin 17

Sensor GND

Sensor ground

Typical · Signal GND

Analog / sensor ground.

Never bond sensor ground to chassis except at the ECU.

Wire · CLT, IAT, TPS, MAP, 0–5 V sensor grounds.

Core EFI V4 48-way Molex connector, key at the top

V4 housing. Match the key to the top of this map. A is the CAN end.

Pin	Molex	TunerStudio	Type	Typical
1	M4	Battery Sense	12v	12 V from main relay output. See also E4 (pin 29). Do not forget L4 (pin 5).
2	M3	—	gnd	Power GND
3	M2	3 - Lowside 2	ls	VVT / idle
4	M1	—	etb	ETB motor +
5	L4	—	12v	12 V from key. Primary on/off supply.
6	L3	—	gnd	Power GND
7	L2	7 - Lowside 1	ls	VVT / idle
8	L1	—	etb	ETB motor −
9	K4	9 - Ignition 1	ign	Coil 1
10	K3	10 - Ignition 2	ign	Coil 2
11	K2	11 - Ignition 3	ign	Coil 3
12	K1	12 - Ignition 4	ign	Coil 4 · 6-cyl injector-driver channel 1
13	J4	13 - GP Out 6	gp_high	Tach / 6-cyl injector-driver 3 / 8-cyl injector-driver A
14	J3	14 - GP Out 5	gp_high	Tach / 6-cyl injector-driver 2 / 8-cyl injector-driver B
15	J2	—	usb	USB white wire
16	J1	—	usb	USB green wire
17	H4	—	agnd	Signal GND
18	H3	18 - AN temp 1	at	CLT
19	H2	19 - AN volt 4	av	Spare 0–5 V
20	H1	20 - AN volt 5	av	TPS (cable) or throttle-body TPS 1 (DBW)
21	G4	—	agnd	Signal GND
22	G3	22 - AN temp 4 or Hall Input or Flex	at	Oil temp / cam 2 / VSS / flex
23	G2	23 - AN temp 2	at	IAT
24	G1	24 - AN temp 3 or Hall Input or Flex	at	Spare temp / VSS / flex / analog pressure
25	F4	25 - Hall Cam	hall	Cam (sequential) or wheel speed (batch)
26	F3	26 - AN volt 2	av	TPS 2 (DBW) / oil pressure
27	F2	27 - AN volt 1	av	MAP
28	F1	28 - AN volt 10, Aux Reuse	av	Fuel pressure / spare analog
29	E4	Main Relay	mr	Main relay
30	E3	30 - AN volt 7	av	PPS 2 (DBW) / O2 / spare
31	E2	31 - AN volt 3	av	PPS 1 (DBW) / O2 / spare
32	E1	32 - AN volt 6, Aux Reuse	av	Wideband analog / spare
33	D4	33 - GP Out 3	gp_low	Spare / boost / stepper
34	D3	34 - GP Out 2	gp_low	Fan relay
35	D2	35 - GP Out 1	gp_low	Fuel pump relay
36	D1	36 - AN volt 8, Aux Reuse	av	Spare analog
37	C4	37 - Injector 1	inj	Injector 1 (4-cyl sequential)
38	C3	38 - Injector 2	inj	Injector 2 (4-cyl sequential)
39	C2	—	5v	MAP sensor supply
40	C1	40 - AN volt 9, Aux Reuse	av	Spare analog
41	B4	41 - Injector 3	inj	Injector 3 (4-cyl sequential)
42	B3	42 - Injector 4	inj	Injector 4 (4-cyl sequential)
43	B2	43 - GP Out 4	gp_low	Spare / boost / second pump relay
44	B1	—	5v	TPS sensor supply
45	A4	45 - VR/Hall Crank	vr	Crank VR+ / Hall
46	A3	—	vr	Crank VR− (do not connect if Hall)
47	A2	—	can	CAN bus Low
48	A1	—	can	CAN bus High