DTC B1321-87: Lost Communication with EMV Missing Message [09/2023 - ]: Procedure
- CHECK FOR DTC
- Check each system for DTCs.
Body Electrical > Combination Meter > Trouble Codes
Body Electrical > Navigation System > Trouble Codes
- Confirm the DTC combinations of the following table.
DTC Output Pattern DTC Output Part Name
(Display on GTS)Combination Meter Assembly
(Combination Meter)Radio and Display Receiver Assembly
(Navigation System)1 B1321-87 U11D0-87
U11D3-87
(Simultaneously output)2 B1321-87 U11D0-87 3 B1321-87 U11D3-87 4 B1321-87 Not output Result
Result Proceed to DTC output pattern 1 A DTC output pattern 2 B DTC output pattern 3 C DTC output pattern 4 D
Result:
B
See step 3
Result:
C
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]
Result:
D
REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [09/2023 - ]
Result:
A
See step 2
- Check each system for DTCs.
- INSPECT EACH ECU (INTERNAL MALFUNCTION)
Pre-procedure1
- Remove 1 of the following ECUs.
- Radio and display receiver assembly
HINT:
Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]
- Mobile wireless charger cradle assembly
HINT:
Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]
- Combination meter assembly
HINT:
Refer to REMOVAL [09/2023 - ]
- Radio and display receiver assembly
- Measure the resistance of the removed ECU.NOTE:
- Refer to the following table for the specified conditions of each ECU.
- If the specified conditions are met, repeat the inspection procedure from step (a) for another ECU.
HINT:
If the results of an ECU are not as specified, it is suspected that the ECU is the cause of the DTC.
- Inspect the radio and display receiver assembly.
*a Component without harness connected
(Radio and Display Receiver Assembly)Standard Resistance
Tester Connection Condition Specified Condition Result D8-11 (CNH1) - D8-12 (CNL1) Always 108 to 132 Ω Ω - Inspect the mobile wireless charger cradle assembly.
*a Component without harness connected
(Mobile Wireless Charger Cradle Assembly)Standard Resistance
Tester Connection Condition Specified Condition Result D6-5 (CANH) - D6-6 (CANL) Always 200 Ω or higher Ω - Inspect the combination meter assembly.
*a Component without harness connected
(Combination Meter Assembly)Standard Resistance
Tester Connection Condition Specified Condition Result D17-32 (TX+) - D17-15 (TX-) Always 30 to 36 kΩ kΩ Result
Result Proceed to The results of all ECUs are as specified A The results of the radio and display receiver assembly is not as specified B The results of the mobile wireless charger cradle assembly is not as specified C The results of the combination meter assembly is not as specified D
Post-procedure1
- None
Result:
A
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
B
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]
Result:
C
REPLACE MOBILE WIRELESS CHARGER CRADLE ASSEMBLY. Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]
Result:
D
REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [09/2023 - ]
- Remove 1 of the following ECUs.
- CHECK HARNESS AND CONNECTOR (LOCAL BUS COMMUNICATION CIRCUIT)
Pre-procedure1
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the D17 combination meter assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result D17-32 (TX+) - D17-15 (TX-) Cable disconnected from negative (-) auxiliary battery terminal 30 to 36 kΩ kΩ Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [09/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR