Apr 25, 2014 · A18 Sensor Ground B18 EST 8 Output (Cylinder #8) A19 Engine Coolant Temp Input B19 Injector A Output A20 Oil Pressure Input B20 EST 12V Output A21 Knock #2 Input B21 EST 1 Output (Cylinder #1) A22 Cam Sync Input / Ignition Bypass Output B22 EST 3 Output (Cylinder #3) A23 Map Sensor Input B23 EST 5 Output (Cylinder #5)