LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2014 >> Impreza WRX STI Limited >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> LAN Communication System DTCS
April 5, 2026: LEMON Manuals is launched! Read the announcement.

LAN Communication System DTCS

LAN COMMUNICATION DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Reference
B1100 Memory read out error in body integrated unit < Refer to DTC B1100 INTEG. UNIT SYSTEM ERROR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1101
  • Open or short in battery power supply control circuit
  • Voltage malfunction caused by poor contact
< Refer to DTC B1101 BATT P/SUPPLY MALFUNCTION CONT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1102
  • Battery power supply backup circuit is open or shorted.
  • Voltage malfunction caused by poor contact
< Refer to DTC B1102 BATT P/SUPPLY MALFUNCTION BACKUP , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1103
  • IGN power supply circuit is open or shorted.
  • Voltage malfunction caused by poor contact
< Refer to DTC B1103 IGNITION POWER FAILURE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1104
  • ACC power supply circuit is open or shorted.
  • Voltage malfunction caused by poor contact
< Refer to DTC B1104 ACC POWER FAILURE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1201 Communication is unstable because of high speed CAN communication error. < Refer to DTC U1201 CAN-HS COUNTER ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1202 Integrated unit communication is shut down because of high speed CAN communication error. < Refer to DTC U1202 CAN-HS BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1211 Received error data from ECM. < Refer to DTC U1211 CAN-HS ECM DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1213 Received error data from VDC/ABS module. < Refer to DTC U1213 CAN-HS VDC/ABS DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1216 Received error data from DCCD CM. < Refer to DTC U1216 HIGH-SPEED CAN (DCCD) DATA ERROR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1221 Not received data from ECM. < Refer to DTC U1221 CAN-HS ECM NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1223 Not received data from VDC/ABS CM. < Refer to DTC U1223 CAN-HS VDC/ABS NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1226 Not received data from DCCD CM. < Refer to DTC U1226 HIGH-SPEED CAN (DCCD) DATA IS NOT RECEIVED , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1300 CAN-LS circuit is open or shorted. < Refer to DTC U1300 CAN-LS MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1301 Communication is unstable because of low speed CAN communication error. < Refer to DTC U1301 CAN-LS COUNTER ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1302 Integrated unit communication is shut down because of low speed CAN communication error. < Refer to DTC U1302 CAN-LS BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1311 Received error data from meter. < Refer to DTC U1311 CAN-LS METER UNIT DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
U1321 Not received data from meter. < Refer to DTC U1321 CAN-LS METER NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1401 Malfunction related immobilizer < Refer to DTC B1401 M COLLATION NG , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1402 Malfunction related immobilizer < Refer to DTC B1402 IMMOBILIZER KEY COLLATION NG , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1403 Malfunction related immobilizer < Refer to DTC B1403 E/G REQUEST NG , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
B1500 Open or short circuit in keyless UART circuit < Refer to DTC B1500 KEYLESS UART COM. MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >