Inspection Procedure

1. Delete the DTCs (see DTC CHECK / CLEAR  ).
2. Recheck for DTCs (see DTC CHECK / CLEAR  ).

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC C1AE2 is output	A
   No DTCs is output	B

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

A: GO TO NEXT STEP 

1. Replace the ultrasonic sensor (see REMOVAL  ) with a normally functioning sensor.
   Fig 1: Identifying No. 1 Ultrasonic Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Delete the DTCs (see DTC CHECK / CLEAR  ).
2. Recheck for DTCs (see DTC CHECK / CLEAR  ).

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC C1AE2 is output (w/o Advanced parking guidance system)	A
   DTC C1AE2 is output (w/ Advanced parking guidance system)	B
   No DTCs is output	C

B: REPLACE PARKING ASSIST ECU (See  REMOVAL   ) 

C: END 

A: REPLACE CLEARANCE WARNING ECU (See  REMOVAL   )