SYSTEM DESCRIPTION 1. GENERAL (a) The heater and blower both have 3 levels controlled by operating the seat heater switch, which is located in the air conditioning control assembly. (b) The on/off state of the heater or blower can be determined by checking if the seat heater switch indicator light is on or off. (c) The blowers of both seats are controlled by the air conditioning amplifier assembly. (d) The seat heaters of both seats are controlled by the seat heater controls, which are located under their respective seats. |
Toyota Tundra Service Manual > Sfi System: VC Output Circuit
DESCRIPTION The ECM constantly generates 5 V power from the battery voltage supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit. When the VC circuit has a short circuit, the microprocessor in the ECM and sens ...
