Question about 2005 Buick Rendezvous
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The AWD data list can be used to assist in determining which type of fault is causing the AWD Disabled Lamp to illuminate. with a scan tool, verify the above data displays are within specification.
AWD temperature disables can be caused by an open circuit.
Using a scan tool, select the Body - Instrument Panel Cluster - Special Functions - Lamp Test mode. In the Lamp Test mode you can turn on or off the instrument panel indicators. All indicators will turn ON when commanded on and OFF when commanded off. The AWD DISABLE indicator should turn on or off as commanded.
If the AWD DISABLE indicator is always ON or always OFF, replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.
The AWD disable lamp illuminates when one of the following conditions exists for 5 seconds:
The PCM commands the solenoid ON and the voltage feedback remains high, B+.
The PCM commands the solenoid OFF and the voltage feedback remains low, 0 volts. This condition is present for 3 key cycles.
The PCM detects fluid temp is too high.
You need to have this hooked-up to a professional grade scan tool.
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