DTC B1321-87: Lost Communication with EMV Missing Message [11/2021 - 12/2022]: 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 (w/o Navigation System) Radio receiver assembly (w/ Navigation System) 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 (w/o Navigation System)
Radio receiver assembly (w/ Navigation System)
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 Receiver Assembly (Navigation System)	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	B1324	Local Bus (Open or short)
			Combination Meter Assembly (Internal malfunction)
			Radio Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Radio Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Combination Meter Assembly (Internal malfunction)

w/o Advanced Drive

W/ NAVIGATION SYSTEM WITH METER MIRROR SUB-ASSEMBLY:

Pattern	DTC Output Part Name (Display on GTS)				Suspected Area (Malfunction Status)
Pattern	Combination Meter Assembly (Combination Meter)	Radio Receiver Assembly (Navigation System)		Meter Mirror Sub-assembly (Head Up Display)	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	B1324	B1325	B1321-87	Local Bus (Open or short)
					Meter Mirror Sub-assembly (Internal malfunction)
					Combination Meter Assembly (Internal malfunction)
					Radio Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	B1324	-	-	Local Bus Branch Line (Open)
Pattern 2	B1321-87	B1324	-	-	Combination Meter Assembly (Internal malfunction)
Pattern 3	B1321-87	-	-	B1321-87	Radio Receiver Assembly (Internal malfunction)
Pattern 4	B1321-87	-	-	-	Combination Meter Assembly (Internal malfunction)

W/ NAVIGATION SYSTEM WITHOUT METER MIRROR SUB-ASSEMBLY:

Pattern	DTC Output Part Name (Display on GTS)		Suspected Area (Malfunction Status)
Pattern	Combination Meter Assembly (Combination Meter)	Radio Receiver Assembly (Navigation System)	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	B1324	Local Bus (Open or short)
			Combination Meter Assembly (Internal malfunction)
			Radio Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Radio Receiver Assembly (Internal malfunction)
Pattern 2	B1321-87	-	Combination Meter Assembly (Internal malfunction)

W/O NAVIGATION SYSTEM:

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	B1324	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)