Rear Cooling Unit: Inspection

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT BLOWER MOTOR (See REAR BLOWER MOTOR CIRCUIT ).
INSPECT REAR MAGNETIC VALVE (See REAR MAGNETIC VALVE CIRCUIT ).
INSPECT SMOKE SENSOR (See SMOKE SENSOR CIRCUIT ).
INSPECT EVAPORATOR
1. Check the evaporator fins for blockage.
  If the fins are clogged, clean them with compressed air.
  
  NOTE: Never use water to clean the evaporator.
2. Check the fitting for cracks or scratches.
If necessary repair or replace.
INSPECT COOLING BOX LIGHT
1. Connect positive (+) lead to terminal 1 and negative (-) lead to terminal 2.
2. Check that the cooling box light lights up.
If cooling box light does not light up, replace the cooling box light.

Fig 1: Inspecting Cooling Box Light Operation
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