Inspection Procedure

1. Disconnect the X13 infrared ray sensor connector.
2. Disconnect the L76 air conditioning amplifier connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   INFRARED RAY SENSOR - AIR CONDITIONING AMPLIFIER RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   X13-3 (LIN) - L76-28 (LIN1)	Always	Below 1 Ω
   X13-3 (LIN) - Body ground	Always	10 kΩ or higher
   L76-28(LIN1)-Body ground	Always	10 kΩ or higher

   Fig 1: Identifying X13 Infrared Ray Sensor And L76 Air Conditioning Amplifier Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Replace the infrared ray sensor with a new or normally functioning one (see REMOVAL ).
2. Operate the infrared ray sensor to check that it functions normally.

   OK: Infrared ray sensor function operates normally. 

NG: REPLACE AIR CONDITIONING AMPLIFIER 

OK: END (INFRARED RAY SENSOR IS FAULTY)