DTC B1321: Lost Communication with EMV [08/2019 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/o Navigation System	A
   w/ Navigation System	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. Check if audio and visual system DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

A 

See step  4

Result: 

B 

GO TO AUDIO AND VISUAL SYSTEM 

for 12.3 Inch Display: Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]

for 8 Inch Display: Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]

1. Check if navigation system DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO NAVIGATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ] 

Result: 

A 

See step  4

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Headup Display System	A
   w/o Headup Display System	B

Result: 

B 

See step  6

Result: 

A 

See step  5

1. Check if headup display system DTCs are output.

   Body Electrical > Head Up Display > Trouble Codes 

   HINT: 

   • If DTC B1321 is output from the meter / gauge system and is not output from the headup display system, it can be suspected that the combination meter assembly has an internal malfunction.
   • If DTC B1321 is output from the headup display system and is not output from the audio and visual system or navigation system, it can be suspected that the radio receiver assembly has an internal malfunction.

   Result

   Result	Proceed to
   DTC B1321 is not output	A
   DTC B1321 is output	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2019 - ] 

Result: 

B 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2019 - ] 

1. Replace the combination meter assembly with a new one.

   Refer to REMOVAL [08/2019 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Turn the engine switch on (IG).
2. Wait 30 seconds or more.
3. Check if meter / gauge system DTCs are output.

   Body Electrical > Combination Meter > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1321 is not output	A
   DTC B1321 is output	B

Result: 

A 

END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2019 - ]