Inspection Procedure

1. Remove the No. 1 ultrasonic sensor
2. Disconnect the No. 1 ultrasonic sensor connector
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   D1-2 (S) - D1-1 (E)	Always	600 to 1200 kΩ

   NOTE:

   • Set the tester to the 100 kΩ range before performing the measurement.
   Fig 1: Identifying D1 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT SENSOR)  (See REMOVAL  )

OK: Go to next step 

1. Disconnect the clearance warning ECU connector
   Fig 2: Identifying ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   Q37-5 (S1) - D1-2 (S)	Always	Below 1 Ω
   Q37-18 (E1) - D1-1 (E)	Always	Below 1 Ω
   Q37-5 (S1) - Body ground	Always	10 kΩ or higher
   Q37-18 (E1) - Body ground	Always	10 kΩ or higher

   Result 

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK (When troubleshooting according to the Problem Symptoms Table)	B
   OK (When troubleshooting according to the DTC)	C

   Fig 3: Identifying D1 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

C: REPLACE CLEARANCE WARNING ECU  (See REMOVAL  )

A: REPAIR OR REPLACE HARNESS OR CONNECTOR