Ignition Signal (Sidekick & Swift)

Ignition signal is sent to ECM terminal A1 (terminal A12 on Swift DOHC or B2 on Swift SOHC) from ignition coil. On Sidekick and Swift SOHC, ECM detects engine speed through this signal and uses it to control various actuators. On Swift DOHC, ECM uses this signal to detect if ignition spark is emitted and stops injector operation when signal is not received.