Toyota Sienna Service Manual: Rear blower resistor
1. INSPECT REAR BLOWER MOTOR CONTROLLER
(a) Measure resistance according to the value(s) in the table below..
If the resistance is not as specified, replace the rear blower motor controller.
(b) Inspect the rear blower motor controller.
(1) Connect the positive (+) lead to terminal 3 through a 12 V to 3.4 W test bulb and negative (-) lead to terminal 1.
(2) Connect the three 1.5 V dry cell batteries' positive (+) lead to terminal 2, and the negative (-) lead to terminal 1. Then check that the test bulb comes on.
OK: The test bulb comes on.
If operation is not as specified, replace the rear blower motor controller.
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Diagnosis display detailed description
HINT: This section contains a detailed description of displays within diagnostic mode. Illustrations may differ from the actual vehicle depending on the device settings and options.