Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
Connectors
MICROSQUIRT-A
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| Point | Signal | Family | Evidence | Destination |
|---|---|---|---|---|
| Power in | single_source· Vendor | SP-14V-1 | ||
| CAN high | single_source· Vendor | not connected | ||
| CAN low | single_source· Vendor | not connected | ||
| Crank / cam | single_source· Vendor | OEM-4-GCAS SGC (cam sync) | ||
| Analog in | single_source· Vendor | OEM-3-BMAF sensor input | ||
| Digital in | single_source· Vendor | OEM-1-KA/C pressure switch (A/C request) | ||
| Low-side out | single_source· Vendor | OEM-1-UFuel pump relay (low-side) | ||
| Low-side out | single_source· Vendor | OEM-1-ACooling fan relay (low-side) | ||
| Injector | single_source· Vendor | OEM-4-UInjector 1 (cyl 1)OEM-4-WInjector 3 (cyl 3) | ||
| Injector | single_source· Vendor | OEM-4-VInjector 2 (cyl 2)OEM-4-XInjector 4 (cyl 4) | ||
| Ignition | single_source· Vendor | OEM-4-NIgnition coil trigger (cyl 1&4) | ||
| Ignition | single_source· Vendor | OEM-4-RIgnition coil trigger (cyl 2&3) | ||
| No data | single_source· Vendor | not connected | ||
| No data | single_source· Vendor | not connected | ||
| No data | single_source· Vendor | not connected | ||
| Low-side out | single_source· Vendor | OEM-1-BA/C condenser fan relay | ||
| Low-side out | single_source· Vendor | OEM-1-GA/C clutch relay | ||
| Sensor ground | single_source· Vendor | SP-0V-1 | ||
| Sensor ground | single_source· Vendor | SP-0V-1 | ||
| Sensor ground | single_source· Vendor | SP-0V-1 | ||
| Crank / cam | single_source· Vendor | OEM-4-FCAS SGT (cam trigger) | ||
| Ground | single_source· Vendor | SP-GND-1 | ||
| Ground | single_source· Vendor | SP-GND-1 | ||
| Analog in | single_source· Vendor | OEM-3-HEGR boost sensor | ||
| Temp in | single_source· Vendor | OEM-3-GEngine coolant temp (CLT) | ||
| Temp in | single_source· Vendor | OEM-3-KIntake air temp (IAT) | ||
| Analog in | single_source· Vendor | OEM-3-FThrottle position (TPS) | ||
| 5V / 8V ref | single_source· Vendor | OEM-3-I+5V sensor reference | ||
| Analog in | single_source· Vendor | OEM-3-NEGR boost sensor (2nd channel) | ||
| Digital in | single_source· Vendor | OEM-1-MVehicle speed sensor (VSS) | ||
| Digital in | single_source· Vendor | OEM-1-CStarter input (12V while cranking) | ||
| Crank / cam | single_source· Vendor | OEM-4-ECrank position (CKP) sensor | ||
| Crank / cam | single_source· Vendor | not connected | ||
| O2 narrowband | single_source· Vendor | OEM-3-CFront O2 sensor input | ||
| Tacho out | single_source· Vendor | OEM-4-LTachometer output |
Mates
No mated connectors (e.g. OEM plug ↔ adapter header).
mates with