DTC B1321-87: Lost Communication with EMV Missing Message [12/2022 - 12/2023]: Procedure

1. Check for DTCs and output pattern according to the following table.
   1. Audio and Visual System:

      Body Electrical > Navigation System > Trouble Codes 

   2. Meter / Gauge System:

      Body Electrical > Combination Meter > Trouble Codes 

   3. Headup Display System:

      Body Electrical > Head Up Display > Trouble Codes 

   Pattern	DTC Output Part Name (Display on GTS)
   	Meter Mirror Sub-assembly (Head Up Display)	Radio and Display Receiver Assembly (Navigation System)		Combination Meter Assembly (Combination Meter)
   Pattern 1	B1321-87	U11D0-87	U11D1-87	B1321-87
   Pattern 2	B1321-87	-	U11D1-87	-
   Pattern 3	B1321-87	-	-	B1321-87
   Pattern 4	B1321-87	-	-	-

   Result

   Result	Proceed to
   Pattern 1 is output	A
   Pattern 2 is output	B
   Pattern 3 is output	C
   Pattern 4 is output	D

Result: 

A 

GO TO METER / GAUGE SYSTEM (B1321-87). Refer to  DTC B1321-87: Lost Communication with EMV Missing Message [12/2022 - 12/2023] 

Result: 

C 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - 12/2023] 

Result: 

D 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [12/2022 - 12/2023] 

Result: 

B 

See step  2

Pre-procedure1

• Disconnect the cable from the negative (-) auxiliary battery terminal.
• Disconnect the meter mirror sub-assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  D95-14 (TX+) - D95-15 (TX-)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [12/2022 - 12/2023] 

Result: 

NG 

REPAIR OR REPLACE CAN WIRE OR CONNECTOR