100%
Aftermarket ECU
INJ1-SIG Injector low side
INJ2-SIG Injector low side
INJ3-SIG Injector low side
INJ4-SIG Injector low side
VTEC-SIG VTEC solenoid low side
IACV-SIG IACV low side
VTC-A VTC solenoid +
VTC-B VTC solenoid -
CMPB-SIG CMP signal
VTPSW-SIG VTEC pressure switch
COIL1-TRG Igniter trigger
COIL2-TRG Igniter trigger
COIL3-TRG Igniter trigger
COIL4-TRG Igniter trigger
Aux 9–10 14V supply
SL8-A
Aftermarket ECU
1Injection channel 1
2Injection channel 2
3Injection channel 3
4Injection channel 4
10Auxiliary output 1
11Auxiliary output 2
18Auxiliary output 9
19Auxiliary output 10
20Digital input 1
21Digital input 2
26Ignition channel 1
27Ignition channel 2
28Ignition channel 3
29Ignition channel 4
34Aux 9–10 14V supply
ECU 14V supply
5V ref
RELAY-R-COIL- Relay coil negative (ECU low-side driver)
RELAY-R-COIL+ Relay coil positive (ignition-switched +12V) (via IGN)
CKP-SIG CKP signal
CMPA-SIG CMP signal
0V sensor
TPS-SIG TPS signal
MAP-SIG MAP signal
KNOCK-SIG Knock signal
GND
IAT-SIG IAT signal
ECT-SIG ECT signal
GND
29–30 no data
SL8-B
Aftermarket ECU
1ECU 14V supply
2Sensor supply Vref1 5.0V
3EFI relay output (low side, 200 mA)
4Ignition switch input
5Crank index sensor +
7Sync sensor +
10Analog sensor 0V reference
11Analog input 1
12Analog input 2
16Knock 1 +
18ECU ground
20Analog input 7 (switchable 1k pull-up)
21Analog input 8 (switchable 1k pull-up)
26ECU ground
29–30 no data
Car battery
BATT-P
Car battery
-Battery negative / chassis ground
+Battery positive
GND
RELAY-R-IN Relay contact input (battery + via main fuse)
CKP
CKP
CKP
12VCKP +12V
GNDCKP sensor ground
SIGCKP signal
CKP +12V
0V sensor
SL8-B-5 Crank index sensor +
CMPA
CMPA
CMPA
12VCMP +12V
GNDCMP sensor ground
SIGCMP signal
CMP +12V
0V sensor
SL8-B-7 Sync sensor +
CMPB
CMPB
CMPB
12VCMP +12V
GNDCMP sensor ground
SIGCMP signal
CMP +12V
0V sensor
SL8-A-20 Digital input 1
COIL1
COIL1
COIL1
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL8-A-26 Ignition channel 1
COIL2
COIL2
COIL2
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL8-A-27 Ignition channel 2
COIL3
COIL3
COIL3
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL8-A-28 Ignition channel 3
COIL4
COIL4
COIL4
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL8-A-29 Ignition channel 4
ECT
ECT
ECT
GNDECT sensor ground
SIGECT signal
0V sensor
SL8-B-21 Analog input 8 (switchable 1k pull-up)
IACV
IACV
IACV
12VIACV +12V
SIGIACV low side
IACV +12V
SL8-A-11 Auxiliary output 2
IAT
IAT
IAT
GNDIAT sensor ground
SIGIAT signal
0V sensor
SL8-B-20 Analog input 7 (switchable 1k pull-up)
INJ1
INJ1
INJ1
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL8-A-1 Injection channel 1
INJ2
INJ2
INJ2
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL8-A-2 Injection channel 2
INJ3
INJ3
INJ3
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL8-A-3 Injection channel 3
INJ4
INJ4
INJ4
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL8-A-4 Injection channel 4
KNOCK
KNOCK
KNOCK
GNDKnock shield/return
SIGKnock signal
0V sensor
SL8-B-16 Knock 1 +
LAF
LAF
LAF
MAP
MAP
MAP
GNDMAP sensor ground
SIGMAP signal
VCCMAP 5V supply
0V sensor
SL8-B-12 Analog input 2
MAP 5V supply
O2
O2
O2
Engine-bay main relay
RELAY-R
Engine-bay main relay
COIL-Relay coil negative (ECU low-side driver)
COIL+Relay coil positive (ignition-switched +12V)
INRelay contact input (battery + via main fuse)
OUTRelay contact output (switched +12V bus)
SL8-B-3 EFI relay output (low side, 200 mA)
Relay coil positive (ignition-switched +12V)
BATT-P-+ Battery positive
SP-12V · 15 pins
TPS
TPS
TPS
GNDTPS sensor ground
SIGTPS signal
VCCTPS 5V supply
0V sensor
SL8-B-11 Analog input 1
TPS 5V supply
VTC
VTC
VTC
AVTC solenoid +
BVTC solenoid -
SL8-A-18 Auxiliary output 9
SL8-A-19 Auxiliary output 10
VTEC
VTEC
VTEC
12VVTEC solenoid +12V
SIGVTEC solenoid low side
VTEC solenoid +12V
SL8-A-10 Auxiliary output 1
VTPSW
VTPSW
VTPSW
GNDSwitch ground
SIGVTEC pressure switch
0V sensor
SL8-A-21 Digital input 2
SP-GND · 8 pins
SP-12V · 17 pins
IGN · 3 pins
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