Toyota Corolla Cross: Steering Wheel

 Brake Warning Light (Yellow) Remains On

DESCRIPTION This procedure is for troubleshooting when the brake system warning light (yellow indicator) remains on but no DTCs are output. The skid control ECU (brake actuator assembly) controls the brake system warning light (yellow indicator) in the combination meter assembly via CAN comm

 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