TERMINALS OF ECU 1. CHECK TRAILER BRAKE CONTROL ECU (BRAKE CONTROL WITH BRACKET RELAY) (a) Disconnect the J172 trailer brake control ECU (brake control with bracket relay) connector and measure the voltage or resistance on the wire harness side. ![]()
(b) Connect the J172 trailer brake control ECU (brake control with bracket relay) connector. (c) Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may be malfunctioning. ![]()
HINT: Measure the values on the wire harness side while the connector is connected.
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Toyota Tundra Service Manual > Climate Control Seat System: System Description
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 i ...