DESCRIPTION The blower motor is operated by signals from the air conditioning amplifier. Blower motor speed signals are transmitted by changes in the duty ratio. Duty Ratio: ![]() The duty ratio is the ratio of the blower motor OFF time (B) to the total of the blower motor ON and OFF time (A + B). The blower motor controller controls the blower motor speed. WIRING DIAGRAM ![]() PROCEDURE
(a) Select the Active Test, using the Techstream to generate a control command, and then check that the blower motor operates. Air Conditioner
(a) Remove the HTR H-fuse from the engine room relay block. (b) Measure the resistance according to the value(s) in the table below. Standard resistance:
![]() (a) Disconnect the J32 blower motor connector. (b) Measure the resistance and voltage according to the value(s) in the table below. Standard resistance:
Standard voltage:
![]() (a) Disconnect the J19 air conditioning amplifier connector. (b) Disconnect the J32 blower motor connector. (c) Measure the resistance according to the value(s) in the table below. Standard resistance:
![]() (a) Disconnect the J19 air conditioning amplifier connector. (b) Reconnect the J32 blower motor connector. (c) Measure the voltage according to the value(s) in the table below. Standard voltage:
![]() (a) Remove the air conditioning amplifier with its connectors still connected
(see page (b) Turn the ignition switch ON. (c) Turn the blower switch LO. (d) Using an oscilloscope, check the waveform. Standard:
HINT: Waveform varies with the blower level.
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Toyota Tundra Owners Manual > For safe use: Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if inhale. WARNINGExhaust gases include harmful carbon monoxide (CO), which is colorless and odorless. Observe the following precautions. Failure to do so may cause exhaust gases to enter the vehicle and may lead to an accident ...