A1 ECU_Enable – Input to enable ECU, powers system
A2 GND – Ground connection for ECU, current return
A3 GND – Ground connection for ECU, current return
A4 GND – Ground connection for ECU, current return
B1 MAP_In – MAP sensor input for intake pressure analog
B2 IAT_In – IAT sensor input for air temperature analog with 2.2k pullup
B3 EngineTemp_In – Engine temp sensor input analog with 2.2k pullup
B4 TPS_In – TPS input for throttle position analog
C1 Wideband_In – Wideband O2 sensor for AFR analog + serial in.
C2 Knock_In – Knock sensor for engine detonation esp32 i2s sound chip in.
C3 Crank_Trigger – Crank sensor for engine timing vr
C4 Oil_Pressure_In – Oil pressure sensor input analog
D1 CANH – CAN High line for network communication
D2 CANL – CAN Low line for network communication
D3 Ign_Power – Power input for ignition, fused From HSD5
D4 Inj_Power – Power input for injectors, fused From HSD5
E1 Sensor_5V – 5V output for sensors, fused F23
E2 Tach_Out – Tach output for engine RPM signal or BOOST Audio In.
E3 Cam_Trigger – Cam sensor for engine timing vr
E4 Boost – pulse low output – same as inj/ing circuit.
F1 Stepper_A+ – Stepper motor A+ for idle control
F2 Stepper_A- – Stepper motor A- for idle control
F3 Stepper_B+ – Stepper motor B+ for idle control
F4 Stepper_B- – Stepper motor B- for idle control
G1 Ign1_Out – Ignition coil output for cylinder 1 inductive low and logic out.
G2 Ign2_Out – Ignition coil output for cylinder 2 inductive low and logic out.
G3 Ign3_Out – Ignition coil output for cylinder 3 inductive low and logic out.
G4 Ign4_Out – Ignition coil output for cylinder 4 inductive low and logic out.
H1 Inj1_Out – Fuel injector output for cylinder 1 inductive low
H2 Inj2_Out – Fuel injector output for cylinder 2 inductive low
H3 Inj3_Out – Fuel injector output for cylinder 3 inductive low
H4 Inj4_Out – Fuel injector output for cylinder 4 inductive low
J1 Inj5_Out – Fuel injector output for cylinder 5 inductive low
J2 Inj6_Out – Fuel injector output for cylinder 6 inductive low
J3 Inj7_Out – Fuel injector output for cylinder 7 inductive low
J4 Inj8_Out – Fuel injector output for cylinder 8 inductive low
K1 12V_Fused_K1K2 – Fused 12V output, with K2 sourced from L1-L3 through fuse.
K2 12V_Fused_K1K2 – Fused 12V output, with K1 sourced from L1-L3 through fuse.
K3 Analog in 0-5v spare +serial in
K4 Digital Spare protected 1000 ohm.
L1 12V_IN – 12V power input to ECU, one of three
L2 12V_IN – 12V power input to ECU, one of three
L3 12V_IN – 12V power input to ECU, one of three
L4 GND – Ground for ECU, high-current return path
M1 HSD1_Out – High-Side Driver output 1, FuelPump, + relay 150ma low out.
M2 HSD2_Out – High-Side Driver output 2, load
M3 HSD3_Out – High-Side Driver output 3, load
M4 HSD4_Out – High-Side Driver output 4, load