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Home >> Lexus >> 2000 >> ES 300 V6-3.0L (1MZ-FE) >> Repair and Diagnosis >> Heating and Air Conditioning >> Control Assembly >> Testing and Inspection
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Control Assembly: Testing and Inspection




1. INSPECT NIGHT LIGHTING
Connect the positive (+) lead from the battery to terminal 28 and the negative (-) lead to terminal 18, then check that the illumination lights up.
If there is bulb not light up, replace the bulb only.
If all bulb does not light up, replace the A/C control panel.




2. INSPECT LCD LIGHTING
Connect the positive (+) lead from the battery to terminal 29, 42 and the negative (-) lead to terminal 30, then check that the illumination lights up.
If there is bulb not light up, replace the replace the bulb only.
If the 2 bulbs do not light up, try replace the bulb with a new one.
If the bulbs do not light up, replace the A/C control panel.




3. INSPECT SWITCH OPERATION
a. Connect the positive (+) lead from the battery to terminal 29, 42 and the negative (-) lead to terminal 30.
b. Operate the switches and check that the indicator and LCD indication change, as shown in the illustration.
If operation is not as specified, replace the A/C control panel.




4. INSPECT SECURITY INDICATOR
Connect the positive (+) lead from the battery to terminal 21 and negative (-) lead to terminal 30, then check that the indicator light up.
If operation is not as specified, replace the A/C control panel.

5. INSPECT A/C CONTROL ASSEMBLY CIRCUIT
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