Air Conditioning Control Assembly (Auto A/C): Inspection

Connect the positive (+) lead from the battery to terminal B-12 and the negative (-) lead to terminal B-2, then check that the bulbs light up.

Fig 1: Inspecting Panel Lighting

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If one bulb does not light up, replace the bulb only. If all bulbs do not light up, replace the A/C control panel.

Connect the positive (+) lead from the battery to terminal B-13, B-26 and the negative (-) lead to terminal B-14, then check that the bulbs lights up.

Fig 2: Inspecting LCD Lighting

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If one bulb does not light up, replace the bulb only. If 2 bulbs do not light up, replace one of the bulbs with a new one. If all the bulbs do not light up, replace the A/C control panel.