Heater Unit: Inspection

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Inspect fins for blockage :
If the fins are clogged, clean them with compressed air.
Inspect air outlet servomotor operation :
1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1. See Fig 2.
2. Connect the negative (-) lead from the battery to each terminal and check that the shaft rotates at each position, as shown in the illustration. See Fig 1.
Fig 1: Servomotor Terminal Position Chart
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Fig 2: Identifying Servomotor & Terminal Positions
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002