| Pin | 1990 | Wire Color | | 1991-1994 | Wire Color |
| | | | | | |
| 1 | Self-Diagnosis Output | yel | | Self-Diagnosis Output | yel |
| 2 | Diagnosis/Data transfer select terminal | wht | | Diagnosis/Data transfer select terminal | wht |
| 3 | Turbo meter (pressure guage) | blk-red | | Turbo meter (pressure guage) | blk-red |
| 4 | Oxygen Sensor | wht | | Oxygen Sensor | wht |
| 5 | Power steering oil pressure switch | yel-blk | | Power steering oil pressure switch | yel-blk |
| 6 | Idle position switch | grn | | Air flow sensor active filter reset | grn-wht |
| 7 | Air conditioner switch | blk-grn | | Air conditioner switch | blk-grn |
| 8 | Intake air temperature sensor | grn-org | | Intake air temperature sensor | grn-org |
| 9 | Detonation sensor | wht | | Detonation sensor | wht |
| 10 | Air flow Sensor | grn-blu | | Air flow Sensor | grn-blu |
| 11 | Empty | | | Empty (ABS Control if equipped) | |
| 12 | Ignition timing adjustment connector | yel-red | | Ignition timing adjustment connector | yel-red |
| 13 | power | blk-wht | | Control relay (Fuel pump drive signal) | blk-wht |
| 14 | airflow sensor | grn-wht | | Idle Switch | grn |
| 15 | EGR temperature sensor (CA Only) | blu-yel | | EGR temperature sensor (CA Only) | blu-yel |
| 16 | Barometric pressure sensor | grn-yel | | Barometric pressure sensor | grn-yel |
| 17 | Sensors ground | grn-blk | | Sensors ground | grn-blk |
| 18 | Vehicle speed sensor | yel-wht | | Vehicle speed sensor | yel-wht |
| 19 | Throttle position sensor | grn-wht | | Throttle position sensor | grn-wht |
| 20 | Coolant temperature sensor | yel-grn | | Coolant temperature sensor | yel-grn |
| 21 | Crank angle sensor (RPM) | blk | | Crank angle sensor (RPM) | blk |
| 22 | Top dead center sensor | wht | | Top dead center sensor | wht |
| 23 | Power supply for sensors (5volts) | grn-red | | Power supply for sensors (5volts) | grn-red |
| 24 | Sensors ground | grn-blk | | Sensors ground | grn-blk |
| 51 | No. 1 Injector | yel-blu | | No. 1 Injector | yel-blu |
| 52 | No. 2 Injector | yel-blk | | No. 2 Injector | yel-blk |
| 53 | EGR Control Solenoid Valve (CA only) | blk-yel | | EGR Control Solenoid Valve (CA only) | blk-yel |
| 54 | Power transistor for #1 and #4 | yel | | Power transistor for #1 and #4 | yel |
| 55 | Power transistor for #2 and #3 | yel-red | | Power transistor for #2 and #3 | yel-red |
| 56 | Control relay (Fuel pump control) | wht-red | | Control relay (Fuel pump control) | wht-red |
| 57 | Fuel pressure control valve | wht | | Fuel pressure control valve | wht |
| 58 | Coil "A1" for idle speed control servo | blu | | Coil "A1" for idle speed control servo | blu |
| 59 | Coil "A2" for idle speed control | yel | | Coil "A2" for idle speed control | yel |
| 60 | No. 3 Injector | lt grn | | No. 3 Injector | lt grn |
| 61 | No. 4 Injector | lt grn-wht | | No. 4 Injector | lt grn-wht |
| 62 | Purge control solenoid valve | blk-wht | | Purge control solenoid valve | blk-wht |
| 63 | MPI Control relay | blk-blu | | MPI Control relay | blk-blu |
| 64 | Engine warning light | red-grn | | Engine warning light | red-grn |
| 65 | Air conditioner relay | red-blk | | Air conditioner relay | red-blk |
| 66 | MPI Control relay | blk-blu | | MPI Control relay | blk-blu |
| 67 | Coil "B1" for idle speed control servo | wht | | Coil "B1" for idle speed control servo | wht |
| 68 | Coil "B2" for idle speed control servo | blk | | Coil "B2" for idle speed control servo | blk |
| 101 | Ground | blk | | Ground | blk |
| 102 | Power supply | red | | Power supply | red |
| 103 | Power supply for backup | red-blk | | Power supply for backup | red-blk |
| 104 | Ground | blk | | Ground | blk |
| 105 | Waste gate solenoid valve | org | | Waste gate solenoid valve | org |
| 106 | Ground | blk | | Ground | blk |
| 107 | Power supply | red | | Power supply | red |
| 108 | "ST" terminal for ignition switch | blk-yel | | "ST" terminal for ignition switch | blk-yel |
| 109 | Ignition pulse detect-Fuel Pump Control | wht | | Ignition pulse detect-Fuel Pump Control | wht |
| 110 | MPI Control Relay | blk-wht | | "1G" terminal for Ignition switch | blk-wht |
