Other information:
Carry emergency gear, including tire chains, window scraper, flares, a
small shovel, jumper cables, and a small bag of sand or salt.
Ask your Toyota dealer to check the following:
Have the proper ratio of antifreeze in the radiator.
Refer to Engine Coolant...
DESCRIPTION The battery state sensor assembly detects the voltage, current and temperature of the auxiliary battery. The charging condition is calculated from the voltage and current and output to the ECM. The ECM sends an instruction to generate voltage to the generator assembly based on that signal...