Inspection Procedure

1. Clear the DTCs (see DTC CHECK/CLEAR ).
2. Check for DTCs (see DTC CHECK/CLEAR ).

   Result 

   DTC OUTPUT RESULT
   
   

   Result	Proceed to
   C1631/5C-5F reappears	A
   C1631/5C-5F reappears and C1AE0/5C-5F or C1AEE/5C-5E appear	B
   No DTCs are output	C

B: GO TO DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

C: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to Next Step 

1. Check if mud, ice, snow or other foreign matter is attached to the sensor.

   OK: 

   No foreign matter on sensor 

   NG: CLEAN ULTRASONIC SENSOR 

   OK: Go to Next Step 

1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.

Fig 1: Identifying No. 2 Ultrasonic Sensor (Front Left Side Sensor)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Clear the DTCs (see DTC CHECK/CLEAR ).
2. Check for DTCs (see DTC CHECK/CLEAR ).

   Result 

   DTC OUTPUT RESULT
   
   

   Result	Proceed to
   C1631/5C-5F reappears	A
   No DTCs are output	B

B: END (ULTRASONIC SENSOR IS DEFECTIVE) 

A: REPLACE PARKING ASSIST ECU  (See REMOVAL )