Reverse Signal Circuit: Procedure

1. Enter the "Display Check" mode (Vehicle Signal Check Mode). Refer to DISPLAY CHECK MODE .
   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.

   OK

   Shift Lever Position	Display
   R	ON
   Except R	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   2 

OK → See step   5 

1. Disconnect the L59 display connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: L59 Display Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   L59-13 (REV) - Body ground	Power switch ON (IG), shift lever R position	11 to 14 V
   L59-13 (REV) - Body ground	Power switch ON (IG), shift lever P position	Below 1 V

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK (for DVD)	B
   OK (for HDD)	C

C → See step   7 

B → See step   6 

A: Go to next step 

1. Disconnect the L59 display connector.
   Fig 3: Identifying L59 Display Connector And S63 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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
   L59-13 (REV) - S63-1 (BCK1)	Always	Below 1 Ω
   L59-13 (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 multi-display displays the rear view of the vehicle when the shift lever position is changed to R.
   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (for DVD)	B
   NG (for HDD)	C

C → See step   7 

B → See step   6 

A → END (LUGGAGE ROOM JUNCTION BLOCK IS DEFECTIVE)