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 C1AEE is output	A
   No DTC is output	B

B: END 

A: GO TO NEXT STEP 

Fig 1: Identifying Terminals Of L90 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Reconnect the L90 ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   PARKING ASSIST ECU RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   L90-27 (CSG3) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   PARKING ASSIST ECU VOLTAGE
   
   

   Tester Connection	Switch Condition	Specified Condition
   L90-8 (CSB3) - Body ground	Engine switch on (IG)	7.2 to 8.8 V

NG: REPLACE PARKING ASSIST ECU (See  REMOVAL   ) 

OK: GO TO NEXT STEP 

Fig 2: Identifying Terminals Of D1 Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the L90 ECU connector.
2. Disconnect the D1 sensor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   PARKING ASSIST ECU - FRONT LEFT SIDE SENSOR
   
   

   Tester Connection	Condition	Specified Condition
   L90-8(CSB3)-D1-1 (BI)	Always	Below 1 Ω
   L90-28(LIN3)-D1-3(SI)	Always	Below 1 Ω
   L90-27 (CSG3)-D1-5 (El)	Always	Below 1 Ω
   L90-8 (CSB3) - Body ground	Always	10 kΩ or higher
   L90-28 (LIN3) - Body ground	Always	10 kΩ or higher
   L90-27 (CSG3) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

Fig 3: Identifying Terminals Of D1 And D5 Sensor Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the D1 and D5 sensor connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   FRONT LEFT SIDE SENSOR - FRONT RIGHT SIDE SENSOR
   
   

   Tester Connection	Condition	Specified Condition
   D1-2(BO)-D5-1 (BI)	Always	Below 1 Ω
   D1-4(SO)-D5-3(SI)	Always	Below 1 Ω
   D1-6(EO)-D5-5(EI)	Always	Below 1 Ω
   D1-2(BO)-Body ground	Always	10 kΩ or higher
   D1-4(SO)- Body ground	Always	10 kΩ or higher
   D1-6(EO)-Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

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

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC C1AEE is output	A
   No DTC is output	B

B: END 

A: GO TO NEXT STEP 

1. Replace the ultrasonic sensor (see REMOVAL  ) with a normally functioning sensor.
   Fig 4: Identifying No. 2 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 C1AEE is output	A
   No DTC is output	B

B: END 

A: GO TO NEXT STEP 

1. Replace the ultrasonic sensor (see REMOVAL  ) with a normally functioning sensor.
   Fig 5: Identifying No. 2 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 C1AEE is output	A
   DTC C1AEC is output	B
   No DTCs are output	C

B: GO TO  DTC C1AEC  

C: END 

A: REPLACE PARKING ASSIST ECU (See  REMOVAL   )