100%
Aftermarket ECU
+12V In
CMP-SIG Cam signal (4x)
MAF-SIG MAF signal (frequency)
RLY-COIL- Relay coil negative (ECU low-side driver)
INJ1-SIG Injector low side
INJ2-SIG Injector low side
COIL1-CTRL Coil trigger low side
COIL2-CTRL Coil trigger low side
O2-HTR O2 heater low side
0V sensor
0V sensor
0V sensor
GND
GND
MAP-SIG MAP signal
ECT-SIG ECT signal
MAF-IAT IAT signal
APP-SIG1 Pedal position 1
5V ref
APP-SIG2 Pedal position 2
CKP-SIG Crank signal (58x)
O2-SIG O2 signal
MICROSQUIRT-A
Aftermarket ECU
1+12V In
4VR2+
5SPAREADC2 (MAF)
8FP (pump)
9INJ 1
10INJ 2
11SPK B (IGN2)
12SPK A (IGN 1)
17WLED
18Sensor Ground
19Serial Ground
20Sensor Ground
22POWER GROUND
23POWER GROUND
24MAP
25CLT
26MAT
27TPS
28TPS VREF (5V)
29SPAREADC
32VR1+
34O2
Battery
BAT
Battery
-Battery negative / chassis ground
+Battery positive
GND
F1
GM LS cam sensor
CMP
GM LS cam sensor
GNDCam sensor ground
SIGCam signal (4x)
VCCCam 5V supply
0V sensor
MICROSQUIRT-A-4 VR2+
Cam 5V supply
GM LS ignition coil
COIL1
GM LS ignition coil
12VCoil +12V
CTRLCoil trigger low side
GNDCoil ground
Coil +12V
MICROSQUIRT-A-11 SPK B (IGN2)
GND
GM LS ignition coil
COIL2
GM LS ignition coil
12VCoil +12V
CTRLCoil trigger low side
GNDCoil ground
Coil +12V
MICROSQUIRT-A-12 SPK A (IGN 1)
GND
GM LS ignition coil
COIL3
GM LS ignition coil
12VCoil +12V
GNDCoil ground
Coil +12V
GND
GM LS ignition coil
COIL6
GM LS ignition coil
12VCoil +12V
GNDCoil ground
Coil +12V
GND
GM LS ignition coil
COIL7
GM LS ignition coil
12VCoil +12V
GNDCoil ground
Coil +12V
GND
GM LS ignition coil
COIL8
GM LS ignition coil
12VCoil +12V
GNDCoil ground
Coil +12V
GND
GM LS ECT sensor
ECT
GM LS ECT sensor
GNDECT sensor ground
SIGECT signal
0V sensor
MICROSQUIRT-A-25 CLT
GM LS fuel injector
INJ1
GM LS fuel injector
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
MICROSQUIRT-A-9 INJ 1
GM LS fuel injector
INJ2
GM LS fuel injector
12VInjector +12V (main relay)
SIGInjector low side
Injector +12V (main relay)
MICROSQUIRT-A-10 INJ 2
GM LS fuel injector
INJ3
GM LS fuel injector
12VInjector +12V (main relay)
Injector +12V (main relay)
GM LS fuel injector
INJ4
GM LS fuel injector
12VInjector +12V (main relay)
Injector +12V (main relay)
GM LS fuel injector
INJ5
GM LS fuel injector
12VInjector +12V (main relay)
Injector +12V (main relay)
GM LS fuel injector
INJ6
GM LS fuel injector
12VInjector +12V (main relay)
Injector +12V (main relay)
GM LS fuel injector
INJ7
GM LS fuel injector
12VInjector +12V (main relay)
Injector +12V (main relay)
GM LS fuel injector
INJ8
GM LS fuel injector
12VInjector +12V (main relay)
Injector +12V (main relay)
GM LS knock sensor
KS1
GM LS knock sensor
GNDKnock shield/return
0V sensor
GM LS knock sensor
KS2
GM LS knock sensor
GNDKnock shield/return
0V sensor
GM LS MAF sensor
MAF
GM LS MAF sensor
12VMAF +12V
GNDMAF ground
IATIAT signal
IATGNDIAT ground
SIGMAF signal (frequency)
MAF +12V
GND
MICROSQUIRT-A-26 MAT
0V sensor
MICROSQUIRT-A-5 SPAREADC2 (MAF)
GM LS MAP sensor
MAP
GM LS MAP sensor
GNDMAP sensor ground
SIGMAP signal
VCCMAP 5V supply
0V sensor
MICROSQUIRT-A-24 MAP
MAP 5V supply
GM LS O2 sensor
O2
GM LS O2 sensor
GNDO2 signal ground
HTRO2 heater low side
HTR+O2 heater supply
SIGO2 signal
0V sensor
MICROSQUIRT-A-17 WLED
O2 heater supply
MICROSQUIRT-A-34 O2
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)
MICROSQUIRT-A-8 FP (pump)
Relay coil positive (ignition-switched +12V)
F1
SP-14V · 19 pins
GM LS electronic throttle body
TB
GM LS electronic throttle body
GNDThrottle sensor ground
VCCThrottle 5V supply
0V sensor
Throttle 5V supply
APP
GM LS accelerator pedal
GND1Pedal 1 low ref
GND2Pedal 2 low ref
SIG1Pedal position 1
SIG2Pedal position 2
VCC1Pedal 1 5V supply
VCC2Pedal 2 5V supply
0V sensor
0V sensor
MICROSQUIRT-A-27 TPS
MICROSQUIRT-A-29 SPAREADC
Pedal 1 5V supply
Pedal 2 5V supply
CKP
GM LS crank sensor
GNDCrank sensor ground
SIGCrank signal (58x)
VCCCrank 5V supply
0V sensor
MICROSQUIRT-A-32 VR1+
Crank 5V supply
COIL4
GM LS ignition coil
12VCoil +12V
GNDCoil ground
Coil +12V
GND
COIL5
GM LS ignition coil
12VCoil +12V
GNDCoil ground
Coil +12V
GND
SP-GND · 13 pins
SP-5V1 · 8 pins
SP-0V · 15 pins
SP-14V · 21 pins
◯New feed: NEW-IGN
Main fuse (size to the load)F1
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.