Multiplex Communication System

DIAGNOSTIC TROUBLE CODE CHART

B1211 - B1241:

B1242 - B1287:

If a trouble code is indicated during the DTC check, check the components listed for that code in the table.

HINT:
- When either DTC B1214 or B1215 is output, a DTC for another ECU communication stop may also be output. In this case, perform troubleshooting for DTC B1214 or B1215 first. DTC B1214 or B1215 is output when a short to +B or short to ground occurs on a communication bus.
- DTCs from B1221 to B1241 do not indicate that the corresponding switch is abnormal. They notify how the switch is operating.

If the corresponding DTC is not indicated when operating a switch, there is a problem with the switch contact.

If a DTC is indicated when not operating switches, the corresponding switch is stuck.