100%
Aftermarket ECU
INJ1-SIG Injector low side
INJ2-SIG Injector low side
INJ3-SIG Injector low side
INJ4-SIG Injector low side
5–8 no data
VTEC-SIG VTEC solenoid low side
RLY-COIL- Relay coil negative (ECU low-side driver)
O2-HTR O2 heater low side
IACV-A IACV low side (coil A)
VTC-A VTC solenoid +
VTC-B VTC solenoid -
VTPSW-SIG VTEC pressure switch
CMP-B-SIG CMP signal
COIL1-TRG Igniter trigger
COIL2-TRG Igniter trigger
COIL3-TRG Igniter trigger
COIL4-TRG Igniter trigger
30–33 no data
Aux 9–10 14V supply
SL4-A
Aftermarket ECU
1Injection channel 1
2Injection channel 2
3Injection channel 3
4Injection channel 4
5–8 no data
10Auxiliary output 1
14Auxiliary output 5
16Auxiliary output 7
17Auxiliary output 8
18Auxiliary output 9
19Auxiliary output 10
20Digital input 1
21Digital input 2
26Ignition channel 1
27Ignition channel 2
28Ignition channel 3
29Ignition channel 4
30–33 no data
34Aux 9–10 14V supply
ECU 14V supply
5V ref
RLY-COIL+ Relay coil positive (ignition-switched +12V) (via NEW-IGN)
CKP-SIG CKP signal
SP-0V · 9 pins
CMP-A-SIG CMP signal
SP-0V · 9 pins
0V sensor
MAP-SIG MAP signal
TPS-SIG TPS signal
O2-SIG Secondary O2 signal
ECT-SIG ECT signal
IAT-SIG IAT signal
KS-SIG Knock signal
GND
GND
29–30 no data
SL4-B
Aftermarket ECU
1ECU 14V supply
2Sensor supply Vref1 5.0V
4Ignition switch input
5Crank index sensor +
6Crank index sensor −
7Sync sensor +
8Sync sensor −
10Analog sensor 0V reference
11Analog input 1
12Analog input 2
13Analog input 3
14Analog input 4
15Analog input 5
16Knock 1 +
18ECU ground
26ECU ground
29–30 no data
Battery
BAT
Battery
-Battery negative / chassis ground
+Battery positive
GND
F1
K-series CKP sensor
CKP
K-series CKP sensor
GNDCKP sensor ground
SIGCKP signal
VCCCKP +12V
0V sensor
SL4-B-5 Crank index sensor +
CKP +12V
K-series CMP sensor
CMP-A
K-series CMP sensor
GNDCMP sensor ground
SIGCMP signal
VCCCMP +12V
0V sensor
SL4-B-7 Sync sensor +
CMP +12V
K-series CMP sensor
CMP-B
K-series CMP sensor
GNDCMP sensor ground
SIGCMP signal
VCCCMP +12V
0V sensor
SL4-A-21 Digital input 2
CMP +12V
K-series coil-on-plug
COIL1
K-series coil-on-plug
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL4-A-26 Ignition channel 1
K-series coil-on-plug
COIL2
K-series coil-on-plug
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL4-A-27 Ignition channel 2
K-series coil-on-plug
COIL3
K-series coil-on-plug
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL4-A-28 Ignition channel 3
K-series coil-on-plug
COIL4
K-series coil-on-plug
12VCoil +12V
GNDCoil ground
TRGIgniter trigger
Coil +12V
GND
SL4-A-29 Ignition channel 4
K-series ECT sensor
ECT
K-series ECT sensor
GNDECT sensor ground
SIGECT signal
0V sensor
SL4-B-14 Analog input 4
K-series IACV
IACV
K-series IACV
12VIACV +12V
AIACV low side (coil A)
IACV +12V
SL4-A-17 Auxiliary output 8
K-series IAT sensor
IAT
K-series IAT sensor
GNDIAT sensor ground
SIGIAT signal
0V sensor
SL4-B-15 Analog input 5
K-series fuel injector
INJ1
K-series fuel injector
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL4-A-1 Injection channel 1
K-series fuel injector
INJ2
K-series fuel injector
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL4-A-2 Injection channel 2
K-series fuel injector
INJ3
K-series fuel injector
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL4-A-3 Injection channel 3
K-series fuel injector
INJ4
K-series fuel injector
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
SL4-A-4 Injection channel 4
K-series knock sensor
KS
K-series knock sensor
SIGKnock signal
SL4-B-16 Knock 1 +
K-series MAP sensor
MAP
K-series MAP sensor
GNDMAP sensor ground
SIGMAP signal
VCCMAP 5V supply
0V sensor
SL4-B-11 Analog input 1
MAP 5V supply
K-series secondary O2 sensor
O2
K-series secondary O2 sensor
GNDO2 signal ground
HTRO2 heater low side
HTR+O2 heater supply
SIGSecondary O2 signal
0V sensor
SL4-A-16 Auxiliary output 7
O2 heater supply
SL4-B-13 Analog input 3
Main relay
RLY
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)
SL4-A-14 Auxiliary output 5
Relay coil positive (ignition-switched +12V)
F1
SP-14V · 16 pins
K-series TPS
TPS
K-series TPS
GNDTPS sensor ground
SIGTPS signal
VCCTPS 5V supply
0V sensor
SL4-B-12 Analog input 2
TPS 5V supply
K-series VTC oil-control solenoid
VTC
K-series VTC oil-control solenoid
AVTC solenoid +
BVTC solenoid -
SL4-A-18 Auxiliary output 9
SL4-A-19 Auxiliary output 10
K-series VTEC solenoid
VTEC
K-series VTEC solenoid
12VVTEC solenoid +12V
SIGVTEC solenoid low side
VTEC solenoid +12V
SL4-A-10 Auxiliary output 1
K-series VTEC oil-pressure switch
VTPSW
K-series VTEC oil-pressure switch
GNDSwitch ground
SIGVTEC pressure switch
0V sensor
SL4-A-20 Digital input 1
SP-GND · 8 pins
SP-14V · 18 pins
SP-0V · 13 pins
◯New feed: NEW-IGN
SP-5V1 · 4 pins
Main fuse (size to the load)F1
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