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

1. Check each system for DTCs.

   Body Electrical > Head Up Display > Trouble Codes 

   Body Electrical > Navigation System > Trouble Codes 

   Body Electrical > Combination Meter > Trouble Codes 

2. Confirm the DTC combinations of the following table.

   DTC Output Pattern	DTC Output Part Name (Display on GTS)
   	Meter Mirror Sub-assembly (Headup Display)	Radio and Display Receiver Assembly (Navigation System)	Combination Meter Assembly (Combination Meter)
   1	B132187	U11D087 U11D187	B132187
   2	B132187	U11D187	Not output
   3	B132187	Not output	B132187
   4	B132187	Not output	Not output

   Result

   Result	Proceed to
   DTC output pattern 1	A
   DTC output pattern 2	B
   DTC output pattern 3	C
   DTC output pattern 4	D

Result: 

A 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

C 

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

Result: 

D 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

B 

See step  2

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the E35 meter mirror sub-assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E35-14 (TX+) -E35-15 (TX-)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR