Tacoma 2WD V6-4.0L (1GR-FE) (2006)
c. Check the mode selector switch voltage.
1. Apply battery voltage (13.5 V) across terminals 10 (IG) and 9 (GND).
2. Connect the positive (+) tester probe of a voltmeter to terminal 5 (MSET) and the negative (-) tester probe to terminal 9 (GND), then check
the voltage.
If the result is not as specified, replace the air conditioning control assembly.
d. Inspect the illumination operation.
1. Connect the positive (+) lead from the battery to terminal 3 (ILL+) and negative (-) lead to terminal 8 (ILL-), then check that the
illuminations light up.
Standard: Illuminations light up
If the result is not as specified, check the faulty bulb.
e. Inspect the bulb.
1. Inspect continuity of the bulb by connecting the tester as shown in the illustration.
Standard: 7 to 11 Ohms at 20 degrees C (68 degrees F)
If continuity exists, replace the heater control. If no continuity exists, replace the bulb.