DTC B1321-87: Lost Communication with EMV Missing Message [06/2020 - 10/2022]: Description

The meter mirror sub-assembly receives signals from the radio and display receiver assembly and combination meter assembly via local bus communication and displays audio system and navigation system information on the headup display.

This DTC is stored when the meter mirror sub-assembly cannot receive the signal.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1321-87	Lost Communication with EMV Missing Message	DTC Detection Condition: IG+ voltage 9.5 to 11.5 V or higher Malfunction Status: Lost communication with radio and display receiver assembly Malfunction Duration: 30 seconds or more	Harness or connector Meter mirror sub-assembly Radio and display receiver assembly Combination meter assembly	DTC stored

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B1321-87

Lost Communication with EMV Missing Message

DTC Detection Condition: IG+ voltage 9.5 to 11.5 V or higher

Malfunction Status: Lost communication with radio and display receiver assembly

Malfunction Duration: 30 seconds or more

Harness or connector
Meter mirror sub-assembly
Radio and display receiver assembly
Combination meter assembly

DTC stored

Pattern	DTC Output Part Name (Display on GTS)				Suspected Area (Malfunction Status)
	Radio and Display Receiver Assembly		Combination Meter Assembly	Meter Mirror Sub-assembly
	B1324	B1325	B1321-87	B1321-87
Pattern 1	◦	◦	◦	◦	Local bus (Open or short)
					Meter mirror sub-assembly (Internal malfunction)
					Combination meter assembly (Internal malfunction)
					Navigation receiver assembly (Internal malfunction)
Pattern 2	◦	-	◦	-	Combination meter assembly (Internal malfunction)
Pattern 3	-	◦	-	◦	Local bus (Open)
Pattern 3	-	◦	-	◦	Meter mirror sub-assembly (Internal malfunction)

◦: DTC is output

-: DTC is not output