There are four connectors for the US-market BC/BF Legacy engine control unit: F47, B56, B58, and B48. This diagram is drawn looking into the ECU's connectors with the locking tabs on top. There are two pin sizes. The numbers in boldface represent the larger pins.

13 12 11 10 9 8 7 6 5 4 3 2 1 26 25 24 23 22 21 20 19 18 17 16 15 14	8 7 6 5 4 3 2 1 16 15 14 13 12 11 10 9	6 5 4 3 2 1 12 11 10 9 8 7	11 10 9 8 7 6 5 4 3 2 1 22 21 20 19 18 17 16 15 14 13 12
F47	B56	B58	B48

F47.1 IAC valve (close end) F47.2 IAC valve (open end) F47.3 Wastegate control T F47.5 Self-shutoff control F47.6 Canister purge control F47.9 Cylinder 3/4 ignition F47.10 Cylinder 1/2 ignition F47.11 Cylinder 3 injector F47.12 Cylinder 2 injector F47.13 Cylinder 1 injector F47.14 Power supply ground F47.15 Ignition ground F47.17 Radiator fan control F47.18 TI monitor F47.19 MIL F47.20 Pressure exchange solenoid T F47.22 A/C cut relay control F47.23 Fuel pump relay control F47.24 Injector ground F47.25 Injector ground F47.26 Cylinder 4 injector B58.1 TPS (ground) B58.2 TPS (signal) B58.3 TPS (power supply) B58.4 Crank angle sensor (+) T Cam angle sensor (+) N B58.5 Crank angle sensor (-) T Cam angle sensor (-) N B58.6 Crank angle sensor (shield) T Cam angle sensor (shield) N B58.7 TPS shield B58.8 MAF sensor pin 5 B58.9 Park switch B58.10 Neutral switch B58.11 VSS B58.12 Ignition switch T: Turbo models only N: Naturally aspirated models only 1: 1990-1992 models only

B56.1 Cam angle sensor (+) T Crank angle sensor (+) N B56.2 Cam angle sensor (-) T Crank angle sensor (-) N B56.3 Cam angle sensor (shield) T Crank angle sensor (shield) N B56.4 Knock sensor (shield) B56.5 Knock sensor (signal) B56.6 Idle switch B56.7 Select Monitor (Rx) B56.8 Select Monitor (Tx) B56.9 A/C switch B56.10 Starter switch B56.11 Jurisdiction ID B56.12 Read memory connector B56.13 Test mode connector B56.15 Trouble code output B56.16 Engine tachometer output B48.2 Power supply B48.3 MAP sensor (power supply) T B48.4 MAP sensor (signal) T B48.5 MAP sensor (ground) T B48.6 Oxygen sensor (signal) B48.7 Water temperature sensor B48.8 MAF sensor (power supply) B48.9 MAF sensor (signal) B48.10 MAF sensor (ground) B48.11 Control system ground B48.13 Power supply B48.15 Backup power supply B48.16 Barometric pressure sensor 1N B48.17 Oxygen sensor (shield) B48.18 MAP shield T B48.19 MAF shield B48.20 Transmission ID B48.21 Sensor ground B48.22 Control system ground

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