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
   S1-2 (S) - S1-1 (E)	Always	600 to 1200 kΩ

   NOTE: Set the tester to the 100 kΩ range before performing the measurement.
Fig 1: Identifying Ultrasonic Sensor Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR)  (See REMOVAL  )

OK: Go to next step 

1. Disconnect the clearance warning ECU connector
   Fig 2: Identifying Q37 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
   Q37-4 (S6) - S1-2 (S)	Always	Below 1 Ω
   Q37-17 (E6) - S1-1 (E)	Always	Below 1 Ω
   Q.37-4 (S6) - Body ground	Always	10 kΩ or higher
   Q37-17 (E6) - 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 S1 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