odometer 137000, nothing known about maintenance history, apart from coils and plugs changed by toyota just few thousand km back, i have myself cleaned the air sensor (is it maf or map?) this increased the rpm by 50 from 550 preciously.
battery voltage read by obd are over 13volts.
point me to the idle-up vacuum. battery health "seems" not that bad judging by the ignition.
why i am asking about the ecu wiring first because i am assuming there aren't much connections that are directly linked to electrical load sensing and AC status sensing.