The air in the small garage was thick with the scent of old grease and burnt coffee as stared at the dashboard of his 1996 Proton Wira
| Pin | Wire Color | Signal | Function | | :--- | :--- | :--- | :--- | | 10 | B/Y | Ground | Power ground (ECU) | | 12 | R | +12V | Battery backup (constant) | | 25 | B | Ground | Sensor ground | | 18 | G/R | TPS | Throttle position sensor | | 21 | G/B | MAP | Manifold absolute pressure | | 22 | L/G | IAC | Idle air control (stepper motor) | | 23 | Y/B | Injector 1 | Injector trigger | | 24 | Y/R | Injector 2 | Injector trigger | | 52 | B/W | Ignition | Ignition timing control (power transistor) | proton wira wiring diagram