Reverse Signal Circuit [06/2020 - 12/2021]: Procedure

1. Move the shift lever to R and check if the back-up lights come on.

   OK

   The back-up lights come on.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO LIGHTING SYSTEM 

w/ AFS: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2020 - 12/2021]

w/o AFS: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2020 - 12/2021]

Result: 

OK 

See step  2

1. Disconnect the radio and display receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Radio and Display Receiver Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G3-28 (REV) - Body ground	Ignition switch ON Shift lever in R	11 to 14 V
   G3-28 (REV) - Body ground	Ignition switch ON 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 [06/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR