Inspection Procedure

1. Disconnect the B9 sensor connector.
2. Measure the voltage according to the value (s) in the table below

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   B9-5 (IGB) - Body ground	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying Terminals Of Millimeter Wave Radar Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step  3

OK: Go to next step 

1. Disconnect the millimeter wave radar sensor connector
2. Disconnect the A5 connector from the ECM.
3. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A5-16 (LGND) - B9-1 (LGND)	Always	Below 1 Ω
   B9-1 (LGND) - Body ground	Always	10 kΩ or higher
   B9-2 (SGND) - Body ground	Always	Below 1 Ω

Fig 2: Identifying Terminals Of Millimeter Wave Radar Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

1. Disconnect the millimeter wave radar sensor and distance control ECU connectors.
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   B9-5 (IGB) - J17-13 (IGB)	Always	Below 1 Ω
   J17-13 (IGB) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying Terminals Of Millimeter Wave Radar Sensor And Distance Control ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE DISTANCE CONTROL ECU  (See DISTANCE CONTROL ECU  )