Reverse Signal Circuit: Procedure

1. Move the shift lever to the R position.
2. Check the back-up light.

   OK

   The back-up light is ON.

NG → See step   6 

OK: Go to next step 

1. Enter the "Display Check" mode (Vehicle Signal Check Mode).
   • Navigation System for HDD: Refer to OPERATION CHECK
   • Navigation System for DVD: Refer to OPERATION CHECK
   Fig 1: Display -- Vehicle Signal Check Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that the display changes between ON and OFF according to the shift lever operation (P and R).
   OK
   
   

   Shift Lever Position	Display
   R	ON
   P	OFF

   HINT: 

   This display is updated once per second. As a result, it is normal for the display to lag behind the actual change in the switch.

NG → See step   3 

OK → See step   7 

1. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying S63 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   S63-1 (BCK1) - Body ground	Engine switch on (IG), shift lever in R	11 to 14 V
   	Engine switch on (IG), shift lever in P	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Rear Junction Block ECU)

NG → See step   8 

OK: Go to next step 

1. Disconnect the L59 display connector.
2. Disconnect the S63 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L59-16 (REV) - S63-1 (BCK1)	Always	Below 1 Ω
   L59-16 (REV) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the ECU with a new or normally functioning one.
2. Check that the display and navigation module display displays the rear view of the vehicle when the shift lever position is changed to R.
   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (w/ Navigation system [for HDD])	B
   NG (w/ Navigation system [for DVD])	C
   NG (w/o Navigation system)	D

D → See step   11 

C → See step   10 

B → See step   9 

A → END (LUGGAGE ROOM JUNCTION BLOCK IS DEFECTIVE)