Rear Heater Unit: Inspection
WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT HEATER RADIATOR
If the fins are clogged, clean them with compressed air.
- INSPECT BLOWER MOTOR OPERATION
Connect battery positive (+) lead to terminal 1 and battery negative (-) lead to terminal 2, then check that the motor rotates smoothly.
If operation is not as specified, replace the blower motor.
- INSPECT AIR MIX SERVOMOTOR (See DTC 47: AIR MIX DAMPER CONTROL SERVOMOTOR CIRCUIT )
- INSPECT AIR MIX DAMPER POSITION SENSOR (See DTC 37 & 47: REAR AIR MIX DAMPER POSITION SENSOR CIRCUIT )