Toyota Corolla Cross: M20a-fxs Auxiliary Battery

 Starter Relay Circuit Short to Battery (P061512)

MONITOR DESCRIPTION While the engine is being cranked, positive auxiliary battery voltage is applied to terminal STA of the ECM. If the ECM detects the starter control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The ECM then illuminat

 External BBC Circuit (P33B300)

DESCRIPTION When the engine is started (high electrical load) from engine stopped by the stop and start control, the external backup boost converter (eco run vehicle converter assembly) supplements auxiliary battery voltage in order to prevent the function from being disabled due to decrease in powe