Toyota Corolla Cross: K120 (cvt)

 ECU Power Source Circuit

DESCRIPTION When the ignition switch is ON, auxiliary battery voltage is applied to terminal MREL of the ECM through the coil of the EFI-MAIN relay. This causes the EFI-MAIN relay to close, which supplies power to terminal +B of the TCM. WIRING DIAGRAM Refer to DTC U010087. Click here CAU

 Precaution

PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE: After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal. Click here HINT: When disconnecting and reconnecting the auxiliary