Inspection Procedure

1. Disconnect the B8 sensor connector.
2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   B8-5 (IGB) - Body ground	Engine switch on (IG)	10 to 16 V

Fig 1: Identifying B8 Sensor Connector

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NG:  Go to step  3

OK: Go to next step 

1. Disconnect the B8 sensor connector.
2. Disconnect the A6 ECM connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   A6-29 (LGND) - B8-1 (LGND)	Below 1 Ω
   B8-1 (LGND) - Body ground	10 kΩ or higher
   B8-2 (SGND) - Body ground	Below 1 Ω

Fig 2: Checking Wire Harness (Millimeter Wave Radar Sensor - ECM And Body Ground)

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NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

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

1. Disconnect the B8 sensor connector.
2. Disconnect the K13 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   B8-5 (IGB) - K13-13 (IGB)	Below 1 Ω
   K13-13 (IGB) - Body ground	10 kΩ or higher

Fig 3: Identifying B8 Sensor Connector And K13 ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

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