DTC B1577: GVIF Disconnected (from EMV/MM Integrated Device to RSE) [12/2017 - 10/2022]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Clear DTCs 

2. Turn the engine switch off.
3. Recheck for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022] 

Result: 

NG 

See step  2

1. Disconnect the G140 radio receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Radio Receiver Assembly)
   *b	Front view of wire harness connector (to Multi-display Controller Sub-assembly)

2. Disconnect the L160 multi-display controller sub-assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G140-2 (GVO+) - L160-2 (GVI+)	Always	Below 1 Ω
   G140-1 (GVO-) - L160-1 (GVI-)	Always	Below 1 Ω
   G140-3 (GVG2) -L160-3 (GVG1)	Always	Below 1 Ω
   G140-2 (GVO+) - Body ground	Always	10 kΩ or higher
   G140-1 (GVO-) - Body ground	Always	10 kΩ or higher
   G140-3 (GVG2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Replace the multi-display controller sub-assembly with a new or known good one.

   Refer to REMOVAL [12/2017 - 10/2022]

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Clear DTCs 

3. Turn the engine switch off.
4. Recheck for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2017 - 10/2022]