Inspection Procedure

NOTE:

When replacing the parking assist ECU, perform initialization of the television camera and calibration of the steering angle sensor and height control sensor.
If the DTC is output after repairs, turn the engine switch on (IG) and move the shift lever to R. Then clear the DTC.

CHECK DTC OUTPUT

Clear the DTCs (see DTC CHECK/CLEAR ).

Check for DTCs (see DTC CHECK/CLEAR ).

Result

DTC OUTPUT RESULT

Result	Proceed to
DTC C1AEE/5C-5E is output	A
No DTC is output	B

B: END

A: Go to Next Step

CHECK PARKING ASSIST ECU

Reconnect the L90 ECU connector.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

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

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

Standard voltage

VOLTAGE SPECIFIED CONDITIONS

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

Fig 1: Identifying L90 Parking Assist ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING ASSIST ECU (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT LEFT SIDE SENSOR)

Disconnect the L90 ECU connector.
Disconnect the D1 sensor connector.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

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 (EI)	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

Fig 2: Identifying L90 Parking Assist ECU And D1 Front Left Side Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT LEFT SIDE SENSOR - FRONT RIGHT SIDE SENSOR)

Disconnect the D1 and D5 sensor connectors.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

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) - DS-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

Fig 3: Identifying D1 Front Left Side Sensor And D5 Front Right Side Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK DTC OUTPUT

Clear the DTCs (see DTC CHECK/CLEAR ).

Check for DTCs (see DTC CHECK/CLEAR ).

Result

DTC OUTPUT RESULT

Result	Proceed to
DTC C1AEE/5C-5E is output	A
No DTC is output	B

B: END

A: Go to Next Step

REPLACE NO. 2 ULTRASONIC SENSOR (FRONT LEFT SIDE SENSOR)
1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
Fig 4: Identifying No. 2 Ultrasonic Sensor (Front Left Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK DTC OUTPUT

Clear the DTCs (see DTC CHECK/CLEAR ).

Check for DTCs (see DTC CHECK/CLEAR ).

Result

DTC OUTPUT RESULT

Result	Proceed to
DTC C1AEE/5C-5E is output	A
No DTC is output	B

B: END

A: Go to Next Step

REPLACE NO. 2 ULTRASONIC SENSOR (FRONT RIGHT SIDE SENSOR)
1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
Fig 5: Identifying No. 2 Ultrasonic Sensor (Front Right Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK DTC OUTPUT

Clear the DTCs (see DTC CHECK/CLEAR ).

Check for DTCs (see DTC CHECK/CLEAR ).

Result

DTC OUTPUT RESULT

Result	Proceed to
DTC C1AEE/5C-5E is output	A
No DTCs are output	B

B: END

A: REPLACE PARKING ASSIST ECU (See REMOVAL )