DTC B1321-87: Lost Communication with EMV Missing Message [12/2021 - ]: Description

The combination meter assembly and multi-media module 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 multi-media module receiver assembly and combination meter assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
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 multi-media module receiver assembly Malfunction Time: 3.0 seconds or more	Harness or connector Multi-media module receiver assembly Mobile wireless charger cradle assembly (w/ Wireless Charging System, except 4-Passenger) Combination meter assembly Meter mirror sub-assembly (w/ Headup Display System)	Combination Meter	A

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

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 multi-media module receiver assembly

Malfunction Time:

3.0 seconds or more

Harness or connector
Multi-media module receiver assembly
Mobile wireless charger cradle assembly (w/ Wireless Charging System, except 4-Passenger)
Combination meter assembly
Meter mirror sub-assembly (w/ Headup Display System)

Combination Meter

W/ HEADUP DISPLAY SYSTEM:

Pattern	DTC Output Part Name (Display on GTS)					Suspected Area (Malfunction Status)
Pattern	Combination Meter	Navigation System			Head up Display	Suspected Area (Malfunction Status)
Pattern 1	B1321-87	U11D0-87	U11D3-87*	U11D3-87	B1321-87	Local bus (Open or short)
						Meter mirror sub-assembly (Internal malfunction)
						Combination meter assembly (Internal malfunction)
						Multi-media module receiver assembly (Internal malfunction)
						Mobile wireless charger cradle assembly (Internal malfunction) (w/ Wireless Charging System, except 4-Passenger)
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	-	-	-	-	Combination meter assembly (Internal malfunction)
Pattern 4	B1321-87	-	-	-	B1321-87	Multi-media module receiver assembly (Internal malfunction)

*: w/ Wireless Charging System, except 4-Passenger

W/O HEADUP DISPLAY SYSTEM:

Pattern	DTC Output Part Name			Suspected Area (Malfunction Status)
Pattern	Combination Meter	Navigation System		Suspected Area (Malfunction Status)
Pattern 1	B1321-87	U11D0-87	U11D3-87*	Local bus (Open or short)
				Combination meter assembly (Internal malfunction)
				Multi-media module receiver assembly (Internal malfunction)
				Mobile wireless charger cradle assembly (Internal malfunction) (w/ Wireless Charging System, except 4-Passenger)
Pattern 2	B1321-87	-	-	Multi-media module receiver assembly (Internal malfunction)
Pattern 2	B1321-87	-	-	Combination meter assembly (Internal malfunction)

*: w/ Wireless Charging System, except 4-Passenger