Toyota Corolla Cross: M20a-fks Spark Plug

 Replacement

REPLACEMENT CAUTION / NOTICE / HINT CAUTION: Do not remove the reserve tank cap, air release valve or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns. PROCEDURE 1. DRAIN ENGINE

 ECM Power Source Circuit

DESCRIPTION When the ignition switch is turned to ON, the auxiliary battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes current to flow to the coil of the EFI-MAIN NO. 1 relay, closing the contacts of the EFI-MAIN NO. 1 relay and sup