Reverse Signal Circuit [06/2018 - 09/2022]: Procedure

1. Check that the back-up light comes on.

   OK

   The back-up light comes on.

   Result

   Result	Proceed to
   OK (for 8 inch display)	A
   OK (for 12.3 inch display w/ Parking Support Alert System)	B
   NG	C

Result: 

B 

See step  3

Result: 

C 

GO TO LIGHTING SYSTEM (EXT). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

A 

See step  2

1. Disconnect the G22 multi-display assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G22-3 (REV) - Body ground	Power switch on (IG) Shift lever in R	11 to 14 V
   G22-3 (REV) - Body ground	Power switch on (IG) Shift lever not in R	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2018 - 09/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the N41 clearance warning ECU assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   N41-28 (STP) - Body ground	Power switch on (IG) Shift lever in R	8 V or higher
   N41-28 (STP) - Body ground	Power switch on (IG) Shift lever not in R	Below 3 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the N41 clearance warning ECU assembly connector.
2. Disconnect the G22 multi-display assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N41-31 (IND) - G22-14 (CSWA)	Always	Below 1 Ω
   N41-31 (IND) or G22-14 (CSWA) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Connect the N41 clearance warning ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Clearance Warning ECU Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   N41-31 (IND) - Body ground	Power switch on (IG) Shift lever in R	Below 3 V
   N41-31 (IND) - Body ground	Power switch on (IG) Shift lever not in R	8 V or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2018 - 09/2022] 

Result: 

NG 

REPLACE CLEARANCE WARNING ECU ASSEMBLY 

for LHD: Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022]

for RHD: Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022]