K20A2 → Emtron KV8 (bulkhead)

Emtron — KV8

Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-04

Revisions

Rev	Label	By	Date
No revisions yet.

Schematic

Connectors

BATT-P

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
+	Battery positive	—	P1	—	0.85	RELAY-R-IN	—	—	—
-	Battery negative / chassis ground	—	P21	—	0.85	SP-GND-1	—	—	—

BHD

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	E1	—	0.5	INJ1-SIG	—	—	—
1	—	—	C33	—	0.5	KV8-B-1	—	—	—
2	—	—	C34	—	0.5	KV8-B-2	—	—	—
2	—	—	E2	—	0.5	INJ2-SIG	—	—	—
3	—	—	E3	—	0.5	INJ3-SIG	—	—	—
3	—	—	C35	—	0.5	KV8-B-3	—	—	—
4	—	—	E4	—	0.5	INJ4-SIG	—	—	—
4	—	—	C36	—	0.5	KV8-B-4	—	—	—
5	—	—	E5	—	0.5	COIL1-TRG	—	—	—
5	—	—	C37	—	0.5	KV8-B-26	—	—	—
6	—	—	E6	—	0.5	COIL2-TRG	—	—	—
6	—	—	C38	—	0.5	KV8-B-27	—	—	—
7	—	—	E7	—	0.5	COIL3-TRG	—	—	—
7	—	—	C39	—	0.5	KV8-B-28	—	—	—
8	—	—	E8	—	0.5	COIL4-TRG	—	—	—
8	—	—	C40	—	0.5	KV8-B-29	—	—	—
9	—	—	E9	—	0.5	CKP-SIG	—	—	—
9	—	—	C41	—	0.5	KV8-D-4	—	—	—
10	—	—	E10	—	0.5	CKP-GND	—	—	—
10	—	—	C42	—	0.5	KV8-C-17	—	—	—
11	—	—	E11	—	0.5	CMPA-SIG	—	—	—
11	—	—	C43	—	0.5	KV8-D-6	—	—	—
12	—	—	E12	—	0.5	CMPA-GND	—	—	—
12	—	—	C44	—	0.5	KV8-C-17	—	—	—
13	—	—	E13	—	0.5	CMPB-SIG	—	—	—
13	—	—	C45	—	0.5	KV8-C-27	—	—	—
14	—	—	E14	—	0.5	CMPB-GND	—	—	—
14	—	—	C46	—	0.5	KV8-C-17	—	—	—
15	—	—	E15	—	0.5	TPS-SIG	—	—	—
15	—	—	C47	—	0.5	KV8-C-2	—	—	—
16	—	—	C48	—	0.5	KV8-D-21	—	—	—
16	—	—	E16	—	0.5	TPS-VCC	—	—	—
17	—	—	C49	—	0.5	KV8-C-17	—	—	—
17	—	—	E17	—	0.5	TPS-GND	—	—	—
18	—	—	E18	—	0.5	MAP-SIG	—	—	—
18	—	—	C50	—	0.5	KV8-C-3	—	—	—
19	—	—	C51	—	0.5	KV8-D-21	—	—	—
19	—	—	E19	—	0.5	MAP-VCC	—	—	—
20	—	—	E20	—	0.5	MAP-GND	—	—	—
20	—	—	C52	—	0.5	KV8-C-17	—	—	—
21	—	—	E21	—	0.5	IAT-SIG	—	—	—
21	—	—	C53	—	0.5	KV8-C-4	—	—	—
22	—	—	E22	—	0.5	IAT-GND	—	—	—
22	—	—	C54	—	0.5	KV8-C-17	—	—	—
23	—	—	E23	—	0.5	ECT-SIG	—	—	—
23	—	—	C55	—	0.5	KV8-C-5	—	—	—
24	—	—	E24	—	0.5	ECT-GND	—	—	—
24	—	—	C56	—	0.5	KV8-C-17	—	—	—
25	—	—	E25	—	0.5	KNOCK-SIG	—	—	—
25	—	—	C57	—	0.5	KV8-D-11	—	—	—
26	—	—	E26	—	0.5	KNOCK-GND	—	—	—
26	—	—	C58	—	0.5	KV8-C-17	—	—	—
27	—	—	E27	—	0.5	VTC-A	—	—	—
27	—	—	C59	—	0.5	KV8-B-18	—	—	—
28	—	—	E28	—	0.5	VTC-B	—	—	—
28	—	—	C60	—	0.5	KV8-B-19	—	—	—
29	—	—	E29	—	0.5	VTEC-SIG	—	—	—
29	—	—	C61	—	0.5	KV8-B-10	—	—	—
30	—	—	C62	—	0.5	KV8-B-11	—	—	—
30	—	—	E30	—	0.5	IACV-SIG	—	—	—
31	—	—	E31	—	0.5	VTPSW-SIG	—	—	—
31	—	—	C63	—	0.5	KV8-C-28	—	—	—
32	—	—	E32	—	0.5	VTPSW-GND	—	—	—
32	—	—	C64	—	0.5	KV8-C-17	—	—	—

CKP

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	CKP signal	—	E9	—	0.5	BHD-9	—	—	—
12V	CKP +12V	—	P16	—	0.85	SP-12V-1	—	—	—
VCC	—	—	—	—	—	—	—	—	—
GND	CKP sensor ground	—	E10	—	0.5	BHD-10	—	—	—

CMPA

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	CMP signal	—	E11	—	0.5	BHD-11	—	—	—
12V	CMP +12V	—	P17	—	0.85	SP-12V-1	—	—	—
VCC	—	—	—	—	—	—	—	—	—
GND	CMP sensor ground	—	E12	—	0.5	BHD-12	—	—	—

CMPB

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	CMP signal	—	E13	—	0.5	BHD-13	—	—	—
12V	CMP +12V	—	P18	—	0.85	SP-12V-1	—	—	—
VCC	—	—	—	—	—	—	—	—	—
GND	CMP sensor ground	—	E14	—	0.5	BHD-14	—	—	—

COIL1

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
TRG	Igniter trigger	—	E5	—	0.5	BHD-5	—	—	—
12V	Coil +12V	—	P12	—	0.85	SP-12V-1	—	—	—
GND	Coil ground	—	P22	—	0.85	SP-GND-1	—	—	—

COIL2

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
TRG	Igniter trigger	—	E6	—	0.5	BHD-6	—	—	—
12V	Coil +12V	—	P13	—	0.85	SP-12V-1	—	—	—
GND	Coil ground	—	P23	—	0.85	SP-GND-1	—	—	—

COIL3

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
TRG	Igniter trigger	—	E7	—	0.5	BHD-7	—	—	—
12V	Coil +12V	—	P14	—	0.85	SP-12V-1	—	—	—
GND	Coil ground	—	P24	—	0.85	SP-GND-1	—	—	—

COIL4

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
TRG	Igniter trigger	—	E8	—	0.5	BHD-8	—	—	—
12V	Coil +12V	—	P15	—	0.85	SP-12V-1	—	—	—
GND	Coil ground	—	P25	—	0.85	SP-GND-1	—	—	—

ECT

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	ECT signal	—	E23	—	0.5	BHD-23	—	—	—
GND	ECT sensor ground	—	E24	—	0.5	BHD-24	—	—	—

IACV

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	IACV low side	—	E30	—	0.5	BHD-30	—	—	—
12V	IACV +12V	—	P20	—	0.85	SP-12V-1	—	—	—

IAT

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	IAT signal	—	E21	—	0.5	BHD-21	—	—	—
GND	IAT sensor ground	—	E22	—	0.5	BHD-22	—	—	—

IGN

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	P3	—	0.5	KV8-D-15	—	—	—
1	—	—	P2	—	0.5	RELAY-R-COIL+	—	—	—

INJ1

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	Injector low side	—	E1	—	0.5	BHD-1	—	—	—
12V	Injector +12V (main relay)	—	P8	—	0.85	SP-12V-1	—	—	—

INJ2

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	Injector low side	—	E2	—	0.5	BHD-2	—	—	—
12V	Injector +12V (main relay)	—	P9	—	0.85	SP-12V-1	—	—	—

INJ3

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	Injector low side	—	E3	—	0.5	BHD-3	—	—	—
12V	Injector +12V (main relay)	—	P10	—	0.85	SP-12V-1	—	—	—

INJ4

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	Injector low side	—	E4	—	0.5	BHD-4	—	—	—
12V	Injector +12V (main relay)	—	P11	—	0.85	SP-12V-1	—	—	—

KNOCK

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	Knock signal	—	E25	—	0.5	BHD-25	—	—	—
GND	Knock shield/return	—	E26	—	0.5	BHD-26	—	—	—

KV8-A

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	—	—	—	—	—	—	—
2	—	—	—	—	—	—	—	—	—
3	—	—	—	—	—	—	—	—	—
4	—	—	—	—	—	—	—	—	—
5	—	—	—	—	—	—	—	—	—
6	—	—	—	—	—	—	—	—	—
7	—	—	—	—	—	—	—	—	—
8	—	—	—	—	—	—	—	—	—
9	—	—	—	—	—	—	—	—	—
10	Lambda 1 heater −	—	—	—	—	—	—	—	—
11	Lambda 2 heater −	—	—	—	—	—	—	—	—
12	—	—	—	—	—	—	—	—	—
13	—	—	—	—	—	—	—	—	—
14	—	—	—	—	—	—	—	—	—
15	—	—	—	—	—	—	—	—	—
16	Lambda 1 heater +	—	—	—	—	—	—	—	—
17	Lambda 2 heater +	—	—	—	—	—	—	—	—
18	Lambda 1 Nernst cell (Vs)	—	—	—	—	—	—	—	—
19	—	—	—	—	—	—	—	—	—
20	Lambda 2 cal resistor	—	—	—	—	—	—	—	—
21	Lambda 2 Nernst cell (Vs)	—	—	—	—	—	—	—	—
22	Lambda 2 pump cell (Ip)	—	—	—	—	—	—	—	—
23	Lambda 2 virtual ground	—	—	—	—	—	—	—	—
24	Lambda 1 cal resistor	—	—	—	—	—	—	—	—
25	Lambda 1 pump cell (Ip)	—	—	—	—	—	—	—	—
26	Lambda 1 virtual ground	—	—	—	—	—	—	—	—

KV8-B

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	Injection 1	—	C33	—	0.5	BHD-1	—	—	—
2	Injection 2	—	C34	—	0.5	BHD-2	—	—	—
3	Injection 3	—	C35	—	0.5	BHD-3	—	—	—
4	Injection 4	—	C36	—	0.5	BHD-4	—	—	—
5	Injection 5	—	—	—	—	—	—	—	—
6	Injection 6	—	—	—	—	—	—	—	—
7	Injection 7	—	—	—	—	—	—	—	—
8	Injection 8	—	—	—	—	—	—	—	—
9	ECU ground	—	P26	—	0.85	SP-GND-1	—	—	—
10	Aux 1	—	C61	—	0.5	BHD-29	—	—	—
11	Aux 2	—	C62	—	0.5	BHD-30	—	—	—
12	Aux 3	—	—	—	—	—	—	—	—
13	Aux 4	—	—	—	—	—	—	—	—
14	Aux 5	—	—	—	—	—	—	—	—
15	Aux 6	—	—	—	—	—	—	—	—
16	Aux 7	—	—	—	—	—	—	—	—
17	Aux 8	—	—	—	—	—	—	—	—
18	Aux 9	—	C59	—	0.5	BHD-27	—	—	—
19	Aux 10	—	C60	—	0.5	BHD-28	—	—	—
20	Aux 11	—	—	—	—	—	—	—	—
21	Aux 12	—	—	—	—	—	—	—	—
22	Aux 13	—	—	—	—	—	—	—	—
23	Aux 14	—	—	—	—	—	—	—	—
24	Aux 15	—	—	—	—	—	—	—	—
25	Aux 16	—	—	—	—	—	—	—	—
26	Ignition 1	—	C37	—	0.5	BHD-5	—	—	—
27	Ignition 2	—	C38	—	0.5	BHD-6	—	—	—
28	Ignition 3	—	C39	—	0.5	BHD-7	—	—	—
29	Ignition 4	—	C40	—	0.5	BHD-8	—	—	—
30	Ignition 5	—	—	—	—	—	—	—	—
31	Ignition 6	—	—	—	—	—	—	—	—
32	Ignition 7	—	—	—	—	—	—	—	—
33	Ignition 8	—	—	—	—	—	—	—	—
34	ECU ground	—	P27	—	0.85	SP-GND-1	—	—	—

KV8-C

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	ECU ground	—	P28	—	0.85	SP-GND-1	—	—	—
2	Analog in 1	—	C47	—	0.5	BHD-15	—	—	—
3	Analog in 2	—	C50	—	0.5	BHD-18	—	—	—
4	Analog in 3	—	C53	—	0.5	BHD-21	—	—	—
5	Analog in 4	—	C55	—	0.5	BHD-23	—	—	—
6	Analog in 5	—	—	—	—	—	—	—	—
7	Analog in 6	—	—	—	—	—	—	—	—
8	Analog in 7	—	—	—	—	—	—	—	—
9	Analog in 8	—	—	—	—	—	—	—	—
10	Analog in 9	—	—	—	—	—	—	—	—
11	Analog in 10	—	—	—	—	—	—	—	—
12	Analog in 11	—	—	—	—	—	—	—	—
13	Analog in 12	—	—	—	—	—	—	—	—
14	Analog in 13	—	—	—	—	—	—	—	—
15	Analog in 14	—	—	—	—	—	—	—	—
16	Analog in 15	—	—	—	—	—	—	—	—
17	Analog sensor 0V reference	—	C44	—	0.5	BHD-12	—	—	—
17	Analog sensor 0V reference	—	C46	—	0.5	BHD-14	—	—	—
17	Analog sensor 0V reference	—	C49	—	0.5	BHD-17	—	—	—
17	Analog sensor 0V reference	—	C52	—	0.5	BHD-20	—	—	—
17	Analog sensor 0V reference	—	C54	—	0.5	BHD-22	—	—	—
17	Analog sensor 0V reference	—	C56	—	0.5	BHD-24	—	—	—
17	Analog sensor 0V reference	—	C64	—	0.5	BHD-32	—	—	—
17	Analog sensor 0V reference	—	C58	—	0.5	BHD-26	—	—	—
17	Analog sensor 0V reference	—	C42	—	0.5	BHD-10	—	—	—
18	Digital in 9	—	—	—	—	—	—	—	—
19	Digital in 10	—	—	—	—	—	—	—	—
20	Digital in 11	—	—	—	—	—	—	—	—
21	Digital in 12	—	—	—	—	—	—	—	—
22	Digital in 13	—	—	—	—	—	—	—	—
23	Digital in 14	—	—	—	—	—	—	—	—
24	Analog in 16	—	—	—	—	—	—	—	—
25	Analog sensor 0V reference	—	—	—	—	—	—	—	—
26	ECU ground	—	P29	—	0.85	SP-GND-1	—	—	—
27	Digital in 1	—	C45	—	0.5	BHD-13	—	—	—
28	Digital in 2	—	C63	—	0.5	BHD-31	—	—	—
29	Digital in 3	—	—	—	—	—	—	—	—
30	Digital in 4	—	—	—	—	—	—	—	—
31	Digital in 5	—	—	—	—	—	—	—	—
32	Digital in 6	—	—	—	—	—	—	—	—
33	Digital in 7	—	—	—	—	—	—	—	—
34	Digital in 8	—	—	—	—	—	—	—	—

KV8-D

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	ECU 14V supply	—	P6	—	0.85	SP-12V-1	—	—	—
2	Aux 13–16 14V supply	—	—	—	—	—	—	—	—
3	Sensor supply 8V	—	—	—	—	—	—	—	—
4	Crank index sensor +	—	C41	—	0.5	BHD-9	—	—	—
5	Crank index sensor −	—	—	—	—	—	—	—	—
6	Sync sensor +	—	C43	—	0.5	BHD-11	—	—	—
7	Sync sensor −	—	—	—	—	—	—	—	—
8	CAN 1 H	—	—	—	—	—	—	—	—
9	EFI relay output (low side, 200 mA)	—	P4	—	0.5	RELAY-R-COIL-	—	—	—
10	CAN 2 H	—	—	—	—	—	—	—	—
11	Knock 1 +	—	C57	—	0.5	BHD-25	—	—	—
12	Knock 1 −	—	—	—	—	—	—	—	—
13	Shield (crank/cam/knock)	—	—	—	—	—	—	—	—
14	CAN 1 L	—	—	—	—	—	—	—	—
15	Ignition switch input	—	P3	—	0.5	IGN-1	—	—	—
16	CAN 2 L	—	—	—	—	—	—	—	—
17	Knock 2 +	—	—	—	—	—	—	—	—
18	Knock 2 −	—	—	—	—	—	—	—	—
19	Analog output 0–5V	—	—	—	—	—	—	—	—
20	Aux 9–12 14V supply	—	P7	—	0.85	SP-12V-1	—	—	—
21	Sensor supply Vref1 5.0V	—	C48	—	0.5	BHD-16	—	—	—
21	Sensor supply Vref1 5.0V	—	C51	—	0.5	BHD-19	—	—	—
22	Sensor supply Vref2 5.0V	—	—	—	—	—	—	—	—
23	Ethernet Tx+	—	—	—	—	—	—	—	—
24	Ethernet Tx−	—	—	—	—	—	—	—	—
25	Ethernet Rx+	—	—	—	—	—	—	—	—
26	Ethernet Rx−	—	—	—	—	—	—	—	—

LAF

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
IP	LAF pump current (Ip)	—	—	—	—	—	—	—	—
VS	LAF Nernst cell (Vs)	—	—	—	—	—	—	—	—
HTR	LAF heater low side	—	—	—	—	—	—	—	—
HTR+	LAF heater supply	—	—	—	—	—	—	—	—

MAP

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	MAP signal	—	E18	—	0.5	BHD-18	—	—	—
VCC	MAP 5V supply	—	E19	—	0.5	BHD-19	—	—	—
GND	MAP sensor ground	—	E20	—	0.5	BHD-20	—	—	—

O2

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	Secondary O2 signal	—	—	—	—	—	—	—	—
GND	O2 signal ground	—	—	—	—	—	—	—	—
HTR	O2 heater low side	—	—	—	—	—	—	—	—
HTR+	O2 heater supply	—	—	—	—	—	—	—	—

RELAY-R

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
COIL+	Relay coil positive (ignition-switched +12V)	—	P2	—	0.5	IGN-1	—	—	—
COIL-	Relay coil negative (ECU low-side driver)	—	P4	—	0.5	KV8-D-9	—	—	—
IN	Relay contact input (battery + via main fuse)	—	P1	—	0.85	BATT-P-+	—	—	—
OUT	Relay contact output (switched +12V bus)	—	P5	—	0.85	SP-12V-1	—	—	—

SP-12V

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	P20	—	0.85	IACV-12V	—	—	—
1	—	—	P12	—	0.85	COIL1-12V	—	—	—
1	—	—	P5	—	0.85	RELAY-R-OUT	—	—	—
1	—	—	P6	—	0.85	KV8-D-1	—	—	—
1	—	—	P7	—	0.85	KV8-D-20	—	—	—
1	—	—	P8	—	0.85	INJ1-12V	—	—	—
1	—	—	P9	—	0.85	INJ2-12V	—	—	—
1	—	—	P10	—	0.85	INJ3-12V	—	—	—
1	—	—	P11	—	0.85	INJ4-12V	—	—	—
1	—	—	P13	—	0.85	COIL2-12V	—	—	—
1	—	—	P14	—	0.85	COIL3-12V	—	—	—
1	—	—	P15	—	0.85	COIL4-12V	—	—	—
1	—	—	P16	—	0.85	CKP-12V	—	—	—
1	—	—	P17	—	0.85	CMPA-12V	—	—	—
1	—	—	P18	—	0.85	CMPB-12V	—	—	—
1	—	—	P19	—	0.85	VTEC-12V	—	—	—

SP-GND

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	P27	—	0.85	KV8-B-34	—	—	—
1	—	—	P25	—	0.85	COIL4-GND	—	—	—
1	—	—	P26	—	0.85	KV8-B-9	—	—	—
1	—	—	P29	—	0.85	KV8-C-26	—	—	—
1	—	—	P28	—	0.85	KV8-C-1	—	—	—
1	—	—	P21	—	0.85	BATT-P--	—	—	—
1	—	—	P22	—	0.85	COIL1-GND	—	—	—
1	—	—	P23	—	0.85	COIL2-GND	—	—	—
1	—	—	P24	—	0.85	COIL3-GND	—	—	—

TPS

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	TPS signal	—	E15	—	0.5	BHD-15	—	—	—
VCC	TPS 5V supply	—	E16	—	0.5	BHD-16	—	—	—
GND	TPS sensor ground	—	E17	—	0.5	BHD-17	—	—	—

VTC

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
A	VTC solenoid +	—	E27	—	0.5	BHD-27	—	—	—
B	VTC solenoid -	—	E28	—	0.5	BHD-28	—	—	—

VTEC

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	VTEC solenoid low side	—	E29	—	0.5	BHD-29	—	—	—
12V	VTEC solenoid +12V	—	P19	—	0.85	SP-12V-1	—	—	—

VTPSW

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
SIG	VTEC pressure switch	—	E31	—	0.5	BHD-31	—	—	—
GND	Switch ground	—	E32	—	0.5	BHD-32	—	—	—

Pin map

OEM point	OEM function	OEM family	Target point	Target function	Target family	Wire colour	Evidence
No mapped pins.

Cut list

Wire	From	To	Gauge (mm²)	Length	Signal	Ident
E1	INJ1-SIG	BHD-1	0.5	no route	Injector low side	—
E2	INJ2-SIG	BHD-2	0.5	no route	Injector low side	—
E3	INJ3-SIG	BHD-3	0.5	no route	Injector low side	—
E4	INJ4-SIG	BHD-4	0.5	no route	Injector low side	—
E5	COIL1-TRG	BHD-5	0.5	no route	Igniter trigger	—
E6	COIL2-TRG	BHD-6	0.5	no route	Igniter trigger	—
E7	COIL3-TRG	BHD-7	0.5	no route	Igniter trigger	—
E8	COIL4-TRG	BHD-8	0.5	no route	Igniter trigger	—
E9	CKP-SIG	BHD-9	0.5	no route	CKP signal	—
P1	BATT-P-+	RELAY-R-IN	0.85	no route	Battery positive	—
P2	IGN-1	RELAY-R-COIL+	0.5	no route	Relay coil positive (ignition-switched +12V)	—
P3	IGN-1	KV8-D-15	0.5	no route	Ignition switch input	—
P4	RELAY-R-COIL-	KV8-D-9	0.5	no route	Relay coil negative (ECU low-side driver)	—
P5	RELAY-R-OUT	SP-12V-1	0.85	no route	Relay contact output (switched +12V bus)	—
P6	SP-12V-1	KV8-D-1	0.85	no route	ECU 14V supply	—
P7	SP-12V-1	KV8-D-20	0.85	no route	Aux 9–12 14V supply	—
P8	SP-12V-1	INJ1-12V	0.85	no route	Injector +12V (main relay)	—
P9	SP-12V-1	INJ2-12V	0.85	no route	Injector +12V (main relay)	—
C33	BHD-1	KV8-B-1	0.5	no route	Injection 1	—
C34	BHD-2	KV8-B-2	0.5	no route	Injection 2	—
C35	BHD-3	KV8-B-3	0.5	no route	Injection 3	—
C36	BHD-4	KV8-B-4	0.5	no route	Injection 4	—
C37	BHD-5	KV8-B-26	0.5	no route	Ignition 1	—
C38	BHD-6	KV8-B-27	0.5	no route	Ignition 2	—
C39	BHD-7	KV8-B-28	0.5	no route	Ignition 3	—
C40	BHD-8	KV8-B-29	0.5	no route	Ignition 4	—
C41	BHD-9	KV8-D-4	0.5	no route	Crank index sensor +	—
C42	BHD-10	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C43	BHD-11	KV8-D-6	0.5	no route	Sync sensor +	—
C44	BHD-12	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C45	BHD-13	KV8-C-27	0.5	no route	Digital in 1	—
C46	BHD-14	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C47	BHD-15	KV8-C-2	0.5	no route	Analog in 1	—
C48	BHD-16	KV8-D-21	0.5	no route	Sensor supply Vref1 5.0V	—
C49	BHD-17	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C50	BHD-18	KV8-C-3	0.5	no route	Analog in 2	—
C51	BHD-19	KV8-D-21	0.5	no route	Sensor supply Vref1 5.0V	—
C52	BHD-20	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C53	BHD-21	KV8-C-4	0.5	no route	Analog in 3	—
C54	BHD-22	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C55	BHD-23	KV8-C-5	0.5	no route	Analog in 4	—
C56	BHD-24	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C57	BHD-25	KV8-D-11	0.5	no route	Knock 1 +	—
C58	BHD-26	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
C59	BHD-27	KV8-B-18	0.5	no route	Aux 9	—
C60	BHD-28	KV8-B-19	0.5	no route	Aux 10	—
C61	BHD-29	KV8-B-10	0.5	no route	Aux 1	—
C62	BHD-30	KV8-B-11	0.5	no route	Aux 2	—
C63	BHD-31	KV8-C-28	0.5	no route	Digital in 2	—
C64	BHD-32	KV8-C-17	0.5	no route	Analog sensor 0V reference	—
E10	CKP-GND	BHD-10	0.5	no route	CKP sensor ground	—
E11	CMPA-SIG	BHD-11	0.5	no route	CMP signal	—
E12	CMPA-GND	BHD-12	0.5	no route	CMP sensor ground	—
E13	CMPB-SIG	BHD-13	0.5	no route	CMP signal	—
E14	CMPB-GND	BHD-14	0.5	no route	CMP sensor ground	—
E15	TPS-SIG	BHD-15	0.5	no route	TPS signal	—
E16	TPS-VCC	BHD-16	0.5	no route	TPS 5V supply	—
E17	TPS-GND	BHD-17	0.5	no route	TPS sensor ground	—
E18	MAP-SIG	BHD-18	0.5	no route	MAP signal	—
E19	MAP-VCC	BHD-19	0.5	no route	MAP 5V supply	—
E20	MAP-GND	BHD-20	0.5	no route	MAP sensor ground	—
E21	IAT-SIG	BHD-21	0.5	no route	IAT signal	—
E22	IAT-GND	BHD-22	0.5	no route	IAT sensor ground	—
E23	ECT-SIG	BHD-23	0.5	no route	ECT signal	—
E24	ECT-GND	BHD-24	0.5	no route	ECT sensor ground	—
E25	KNOCK-SIG	BHD-25	0.5	no route	Knock signal	—
E26	KNOCK-GND	BHD-26	0.5	no route	Knock shield/return	—
E27	VTC-A	BHD-27	0.5	no route	VTC solenoid +	—
E28	VTC-B	BHD-28	0.5	no route	VTC solenoid -	—
E29	VTEC-SIG	BHD-29	0.5	no route	VTEC solenoid low side	—
E30	IACV-SIG	BHD-30	0.5	no route	IACV low side	—
E31	VTPSW-SIG	BHD-31	0.5	no route	VTEC pressure switch	—
E32	VTPSW-GND	BHD-32	0.5	no route	Switch ground	—
P10	SP-12V-1	INJ3-12V	0.85	no route	Injector +12V (main relay)	—
P11	SP-12V-1	INJ4-12V	0.85	no route	Injector +12V (main relay)	—
P12	SP-12V-1	COIL1-12V	0.85	no route	Coil +12V	—
P13	SP-12V-1	COIL2-12V	0.85	no route	Coil +12V	—
P14	SP-12V-1	COIL3-12V	0.85	no route	Coil +12V	—
P15	SP-12V-1	COIL4-12V	0.85	no route	Coil +12V	—
P16	SP-12V-1	CKP-12V	0.85	no route	CKP +12V	—
P17	SP-12V-1	CMPA-12V	0.85	no route	CMP +12V	—
P18	SP-12V-1	CMPB-12V	0.85	no route	CMP +12V	—
P19	SP-12V-1	VTEC-12V	0.85	no route	VTEC solenoid +12V	—
P20	SP-12V-1	IACV-12V	0.85	no route	IACV +12V	—
P21	BATT-P--	SP-GND-1	0.85	no route	Battery negative / chassis ground	—
P22	SP-GND-1	COIL1-GND	0.85	no route	Coil ground	—
P23	SP-GND-1	COIL2-GND	0.85	no route	Coil ground	—
P24	SP-GND-1	COIL3-GND	0.85	no route	Coil ground	—
P25	SP-GND-1	COIL4-GND	0.85	no route	Coil ground	—
P26	SP-GND-1	KV8-B-9	0.85	no route	ECU ground	—
P27	SP-GND-1	KV8-B-34	0.85	no route	ECU ground	—
P28	SP-GND-1	KV8-C-1	0.85	no route	ECU ground	—
P29	SP-GND-1	KV8-C-26	0.85	no route	ECU ground	—

Bill of materials

Category	Part number	Manufacturer	Description	Qty	Unit
connector	3-1437290-7	TE	Superseal 1.0 26-way plug	1.000	ea
connector	3-1437290-8	TE	Superseal 1.0 26-way plug, Key 2	1.000	ea
connector	4-1437290-0	TE	Superseal 1.0 34-way plug, Key 1	1.000	ea
connector	4-1437290-1	TE	Superseal 1.0 34-way plug, Key 2	1.000	ea
connector	6189-0553	Sumitomo	K-series fuel injector plug (HX090-2S-3, 2-way)	4.000	ea
connector	6189-0728	Sumitomo	K-series coil-on-plug plug (HX090-3S-2, 3-way)	4.000	ea
connector	6189-0887	Sumitomo	K-series sensor plug (HX040-3S-1, 3-way — MAP/CKP/CMP/TPS)	5.000	ea
connector	HONDA-K-ECT	Honda	K-series ECT sensor plug (P/N unknown; 2-way)	1.000	ea
connector	HONDA-K-IACV	Honda	K-series IACV plug (P/N unknown; 2-way)	1.000	ea
connector	HONDA-K-IAT	Honda	K-series IAT sensor plug (P/N unknown; 2-way)	1.000	ea
connector	HONDA-K-KS	Honda	K-series knock sensor plug (P/N unknown; 2-way)	1.000	ea
connector	HONDA-K-LAF	Denso	K-series LAF O2 sensor plug (P/N unknown; 4-way)	1.000	ea
connector	HONDA-K-O2	Denso	K-series secondary O2 sensor plug (P/N unknown; 4-way)	1.000	ea
connector	HONDA-K-VTC	Honda	K-series VTC solenoid plug (P/N unknown; 2-way)	1.000	ea
connector	HONDA-K-VTPSW	Honda	K-series VTEC oil-pressure switch plug (P/N unknown; 2-way)	1.000	ea
connector	HONDA-K-VTS	Honda	K-series VTEC solenoid plug (P/N unknown; 2-way)	1.000	ea
connector	K-BHD-01	hx	K-swap engine bulkhead, 32-way (app-defined; physical part TBD per D2)	1.000	ea

ECU setup sheet

Role	Engine ref	Engine signal	Sensor	ECU point	ECU function	ECU class	Setup flag
cam	CMPA	CMP signal	hall	KV8-D-6	Sync sensor +	cam_hall	—
cam	CMPB	CMP signal	hall	KV8-C-27	Digital in 1	switch_in	Hall cam/crank signal on a general digital input — confirm the input's max frequency covers the cam signal.
coil	COIL1	Igniter trigger	—	KV8-B-26	Ignition 1	ignition	—
coil	COIL2	Igniter trigger	—	KV8-B-27	Ignition 2	ignition	—
coil	COIL3	Igniter trigger	—	KV8-B-28	Ignition 3	ignition	—
coil	COIL4	Igniter trigger	—	KV8-B-29	Ignition 4	ignition	—
crank	CKP	CKP signal	hall	KV8-D-4	Crank index sensor +	crank_vr	Hall sensor on a VR-classed input — verify the trigger channel accepts a Hall (digital) signal and configure it as Hall, not VR.
iacv	IACV	IACV low side	—	KV8-B-11	Aux 2	low_side	—
injector	INJ1	Injector low side	—	KV8-B-1	Injection 1	injector	—
injector	INJ2	Injector low side	—	KV8-B-2	Injection 2	injector	—
injector	INJ3	Injector low side	—	KV8-B-3	Injection 3	injector	—
injector	INJ4	Injector low side	—	KV8-B-4	Injection 4	injector	—
knock	KNOCK	Knock signal	—	KV8-D-11	Knock 1 +	knock	—
map	MAP	MAP signal	0_5v	KV8-C-3	Analog in 2	analog_0_5	—
switch	VTPSW	VTEC pressure switch	switch	KV8-C-28	Digital in 2	switch_in	—
temp	ECT	ECT signal	thermistor	KV8-C-5	Analog in 4	analog_0_5	—
temp	IAT	IAT signal	thermistor	KV8-C-4	Analog in 3	analog_0_5	—
tps	TPS	TPS signal	0_5v	KV8-C-2	Analog in 1	analog_0_5	—
vtc	VTC	VTC solenoid +	—	KV8-B-18	Aux 9	hbridge	—
vtc	VTC	VTC solenoid -	—	KV8-B-19	Aux 10	hbridge	—
vtec	VTEC	VTEC solenoid low side	—	KV8-B-10	Aux 1	low_side	—

Findings

Open (7)

Severity	Code	Subject	Message
warn	DATASET_GAP	K-series CKP sensor J	1 of 3 cavities on K-series CKP sensor J have no pin data (VCC). Anything there is invisible to these checks.
warn	DATASET_GAP	K-series CMP sensor J	1 of 3 cavities on K-series CMP sensor J have no pin data (VCC). Anything there is invisible to these checks.
warn	DATASET_GAP	KV8 A	14 of 26 cavities on KV8 A have no pin data (1,2,3,4,5,6,7,8,9,12,13,14,15,19). Anything there is invisible to these checks.
warn	NET_FAMILY	KV8-B-26 ↔ COIL1-TRG	KV8-B-26 "Ignition 1" [ignition_out] is wired to COIL1-TRG "Igniter trigger" [load]. Ignition outputs are often logic-level drivers for coils with built-in igniters; confirm the channel can sink this load.
warn	NET_FAMILY	KV8-B-27 ↔ COIL2-TRG	KV8-B-27 "Ignition 2" [ignition_out] is wired to COIL2-TRG "Igniter trigger" [load]. Ignition outputs are often logic-level drivers for coils with built-in igniters; confirm the channel can sink this load.
warn	NET_FAMILY	KV8-B-28 ↔ COIL3-TRG	KV8-B-28 "Ignition 3" [ignition_out] is wired to COIL3-TRG "Igniter trigger" [load]. Ignition outputs are often logic-level drivers for coils with built-in igniters; confirm the channel can sink this load.
warn	NET_FAMILY	KV8-B-29 ↔ COIL4-TRG	KV8-B-29 "Ignition 4" [ignition_out] is wired to COIL4-TRG "Igniter trigger" [load]. Ignition outputs are often logic-level drivers for coils with built-in igniters; confirm the channel can sink this load.

Accepted (3)

Code	Subject	Reason	By
PHYS_REQUIRED_OPEN	LAF-IP	Primary LAF wideband sensor needs an external wideband controller (no onboard lambda). Deferred.	mapping-proposal
PHYS_REQUIRED_OPEN	LAF-VS	Primary LAF wideband sensor needs an external wideband controller (no onboard lambda). Deferred.	mapping-proposal
NET_FAMILY	KV8-D-15 ↔ RELAY-R-COIL+	Ignition-switch sense (KV8-D-15) also feeds the main relay coil positive. The ECU reads key-on there and holds the main relay via its EFI relay output. Intended Emtron topology.	mapping-proposal

Notes

K20A2 engine harness to the K-BHD-01 bulkhead, plus the ECU sub-harness to KV8. The engine→bulkhead side is identical across ECUs; only the bulkhead→ECU side is regenerated. Power distribution wired (battery / main relay / switched +12V bus / power grounds). Fuse ratings and the main-feed gauge are left for the builder (K20 loads, not Honda FSM).

Sources

Reliability	Kind	Title	URL
4	vendor_doc	Emtron SL4/SL6/SL8 pinout pages	https://docs.emtronaustralia.com.au/engine-management/wiring/index.html
4	oem_wiring_diagram	Mazda MX-5 NB2 (2003) wiring diagram — engine / starting / charging	https://web.archive.org/web/20191104195207/http://mellens.net/mazda/mazda_miata_extra_manual/2003_wiring.pdf
3	forum	rusEFI Mazda Miata 2002 engine wiring	https://github.com/rusefi/rusefi/wiki/Mazda-Miata-2002
2	forum	K-series engine harness sensor/actuator connectors (KSV Looms + Hybrid Racing cross-ref)	https://www.ksvlooms.com/
2	user_dataset	Subaru ECU Matcher dataset (hiubin), vehicleId=1	—