DTC B1557-87: Blu-ray Disc Player Missing Message [10/2022 - ]: Procedure

1. Turn the ignition switch off.
2. Check that the connectors are properly connected to the multi-display controller sub-assembly and disc player assembly.

   OK

   Connectors are properly connected.

   Result

   Result	Proceed to
   The connectors are properly connected	A
   The connectors are not properly connected	B

Result: 

B 

CONNECT CONNECTORS PROPERLY 

Result: 

A 

See step  2

Pre-procedure1

1. Disconnect the L140 disc player assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L140-13 (GND) - Body ground	Always	Below 1 Ω

   Post-procedure1

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L140-8 (+B) - Body ground	Always	11 to 14 V
   L140-7 (ACC) - Body ground	Ignition switch on ACC	11 to 14 V

   Result

   Proceed to
   OK
   NG

   Procedure1

4. None.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Pre-procedure1

1. Disconnect the L137 multi-display controller sub-assembly connector.
2. Disconnect the L140 disc player assembly connector.

   Procedure1

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L137-14 (TX3+) - L140-9 (TX+)	Always	Below 1 Ω
   L137-15 (TX3-) - L140-10 (TX-)	Always	Below 1 Ω
   L137-14 (TX3+) - Body ground	Always	10 kΩ or higher
   L137-15 (TX3-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Replace the disc player assembly with a new or known good one.

   Refer to REMOVAL [12/2017 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

Body Electrical > Navigation System > Clear DTCs 

Result

Result: 

NEXT 

See step  6

Pre-procedure1

1. Display video on the television display assembly.

   HINT: 

   It is also possible to check if DTCs are output by performing a video device connection check.

   Refer to DIAGNOSIS SYSTEM [10/2022 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - ]

   Procedure1

2. Recheck for DTCs and check if the same DTC is output again.

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Result	Proceed to
   DTC are not output	A
   DTCs are output	B

   Post-procedure1

3. None

Result: 

A 

END (DISC PLAYER ASSEMBLY IS DEFECTIVE) 

Result: 

B 

REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY. Refer to  REMOVAL [12/2017 - ]