Reverse Signal Circuit: Procedure

1. Disconnect the J100 connector from the display and navigation module display.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J100-16 (REV) - Body ground	Engine switch on (IG) Shift lever in R	11 to 14 V
   J100-16 (REV) - Body ground	Engine switch on (IG) Shift lever in any position except R	Below 1 V

NG → See step   2 

OK → See step   6 

1. Disconnect the Q2 connector from the main body ECU LH (cowl side junction block LH).
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J100-16 (REV) - Q2-2 (BACK)	Always	Below 1 Ω
   J100-16 (REV) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / ECT / Data List.
5. According to the display on the Techstream, read the "Data List".
   ECM
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Shift SW Status (R Range)	Park/neutral position switch status/ ON or OFF	Shift lever is: ON: Shift lever is in R OFF: Shift lever is not in R	When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect

   OK

   Shift Lever Position	Display
   R	ON
   Except R	OFF

NG → See step   7 

OK: Go to next step 

1. Replace the main body ECU LH (cowl side junction block LH).
2. Enter "Vehicle Signal Check Mode".

   HINT: 

   Refer to Check Vehicle Signal in Operation Check. Refer to OPERATION CHECK .

   Fig 1: Identifying Vehicle Signal Check Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the display changes between ON and OFF according to the shift lever operation.

   OK

   Shift Lever Position	Display
   Except R	OFF
   R	ON

   HINT: 

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

NG → See step   5 

OK → END 

1. Replace the network gateway ECU. Refer to REMOVAL .
2. Enter "Vehicle Signal Check Mode".

   HINT: 

   Refer to Check Vehicle Signal in Operation Check. Refer to OPERATION CHECK .

   Fig 2: Identifying Vehicle Signal Check Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the display changes between ON and OFF according to the shift lever operation.

   OK

   Shift Lever Position	Display
   Except R	OFF
   R	ON

   HINT: 

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

NG → See step   8 

OK → END