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

The combination meter assembly and radio and display receiver assembly communicate via local bus communication. This allows audio and visual system information to be displayed on the multi-information display. This DTC is stored when a communication error occurs between the radio and display receiver assembly and combination meter assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	DTC Output from	Priority	Note
B1321-87	Lost Communication with EMV Missing Message	Diagnosis Condition: Ignition switch ON IG power source voltage is 9.5 V or more Malfunction Status: No communication with radio and display receiver assembly	Harness or connector Radio and display receiver assembly Combination meter assembly Meter mirror sub-assembly (w/ Headup Display System)	DTC stored	Combination Meter	A	-

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

DTC Output from

Priority

Note

B1321-87

Lost Communication with EMV Missing Message

Diagnosis Condition:

Ignition switch ON
IG power source voltage is 9.5 V or more

Malfunction Status:

No communication with radio and display receiver assembly

Harness or connector
Radio and display receiver assembly
Combination meter assembly
Meter mirror sub-assembly (w/ Headup Display System)

DTC stored

Combination Meter

w/ Advanced Drive

Pattern	DTC Output Part Name (Display on GTS)		Suspected Area (Malfunction Status)
Pattern	Combination Meter Assembly (Combination Meter)	Radio and Display Receiver Assembly (Navigation System)	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	U11D0-87	Local Bus (Open or short)
			Combination Meter Assembly (Internal malfunction)
			Radio and Display Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Radio and Display Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Combination Meter Assembly (Internal malfunction)

w/o Advanced Drive

W/ METER MIRROR SUB-ASSEMBLY:

Pattern	DTC Output Part Name (Display on GTS)				Suspected Area (Malfunction Status)
Pattern	Combination Meter Assembly (Combination Meter)	Radio and Display Receiver Assembly (Navigation System)		Meter Mirror Sub-assembly (Head Up Display)	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	U11D0-87	U11D1-87	B1321-87	Local Bus (Open or short)
					Meter Mirror Sub-assembly (Internal malfunction)
					Combination Meter Assembly (Internal malfunction)
					Radio and Display Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	U11D0-87	-	-	Local Bus Branch Line (Open)
Pattern 2	B1321-87	U11D0-87	-	-	Combination Meter Assembly (Internal malfunction)
Pattern 3	B1321-87	-	-	B1321-87	Radio and Display Receiver Assembly (Internal malfunction)
Pattern 4	B1321-87	-	-	-	Combination Meter Assembly (Internal malfunction)

W/O METER MIRROR SUB-ASSEMBLY:

Pattern	DTC Output Part Name (Display on GTS)		Suspected Area (Malfunction Status)
Pattern	Combination Meter Assembly (Combination Meter)	Radio and Display Receiver Assembly (Navigation System)	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	U11D1-87	Local Bus (Open or short)
			Combination Meter Assembly (Internal malfunction)
			Radio and Display Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Radio and Display Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Combination Meter Assembly (Internal malfunction)