DTC B1321-87: Lost Communication with EMV Missing Message [12/2019 - 10/2022]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for 8 Inch Multi-display Type	A
   for 12.3 Inch Multi-display Type	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. Check if navigation system*1 or audio and visual system*2 DTCs are output.
   1. *1: w/ Navigation System
   2. *2: w/o Navigation System

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output (w/ Navigation System)	B
   DTCs are output (w/o Navigation System)	C

Result: 

A 

See step  6

Result: 

B 

GO TO NAVIGATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2022] 

Result: 

C 

GO TO AUDIO AND VISUAL SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2022] 

1. Check if navigation system DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   Result

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

Result: 

B 

GO TO NAVIGATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] 

Result: 

A 

See step  4

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Headup Display System	A
   w/o Headup Display System	B

Result: 

B 

See step  6

Result: 

A 

See step  5

1. Check if headup display system DTCs are output.

   Body Electrical > Head Up Display > Trouble Codes 

   HINT: 

   • If DTC B1321-87 is output from the meter / gauge system and is not output from the headup display system, it can be suspected that the combination meter assembly has an internal malfunction.
   • If DTC B1321-87 is output from the headup display system and is not output from the navigation system, it can be suspected that the radio receiver assembly has an internal malfunction.

   Result

   Result	Proceed to
   DTC B1321-87 is not output	A
   DTC B1321-87 is output	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

Result: 

B 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

1. Replace the combination meter assembly with a new one.

   Refer to REMOVAL [12/2019 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Turn the ignition switch to ON.
2. Wait 30 seconds or more.
3. Check if meter / gauge system DTCs are output.

   Body Electrical > Combination Meter > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1321-87 is not output	A
   DTC B1321-87 is output (for 8 Inch Multi-display Type)	B
   DTC B1321-87 is output (for 12.3 Inch Multi-display Type)	C

Result: 

A 

END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

C 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]