Check Point

When DTC B1321 or B1326 are output from the combination meter assembly, other ECUs on the same detection circuit may simultaneously output the same DTC depending on the malfunctioning area.
Depending on the combination of DTCs simultaneously output by each ECU, the malfunctioning area can be narrowed down. Refer to the following table for DTC combinations output by each ECU.

DTC Output Pattern	DTC Output Part Name (Display on Techstream)		Suspected Area
DTC Output Pattern	Combination Meter Assembly (Combination Meter)	Radio Receiver Assembly (Navigation System)	Suspected Area
1	B1321 B1326	B1323 B1324 B1326	Harness or connector Radio receiver assembly Clock assembly Remote operation controller assembly Combination meter assembly
2	B1321 B1326	B1324	Harness or connector Combination meter assembly
3	B1321 B1326	Not output	Combination meter assembly
4	B1321	B1323 B1324 B1326	Harness or connector Radio receiver assembly
5	B1321	Not output	Radio receiver assembly Combination meter assembly
6	B1326	B1326	Harness or connector Clock assembly
7	B1326	Not output	Combination meter assembly