2019 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Keyless Access System

Code Description & trouble position Reference
B2271 IGN RELAY CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE DTC (CODE)>DTC B2271 IGN RELAY CONTROL CIRCUIT .
B2274 ACC RELAY CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2274 ACC RELAY CONTROL CIRCUIT .
B2275 ENGINE START REQUEST CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT .
B2276 ACC RELAY OFF SIGNAL Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2276 ACC RELAY OFF SIGNAL .
B2277 SUBMERGING CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2277 SUBMERGING CIRCUIT .
B227B PUSH ENGINE START SWITCH INPUT PERFORMANCE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B227B PUSH ENGINE START SWITCH INPUT PERFORMANCE .
B227C P RANGE SIGNAL PERFORMANCE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B227C P RANGE SIGNAL PERFORMANCE .
B2282 VEHICLE SPEED SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2282 VEHICLE SPEED SIGNAL CORRELATION .
B2283 VEHICLE SPEED SENSOR Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2283 VEHICLE SPEED SENSOR .
B2284 BRAKE SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2284 BRAKE SIGNAL CORRELATION .
B2285 STEERING LOCK POSITION SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION .
B2286 ENGINE SPEED SIGNAL (WITHOUT Auto Start Stop) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2286 ENGINE SPEED SIGNAL (WITHOUT AUTO START STOP) .
B2779 REMOTE CONTROL ENGINE STARTER COLLATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2779 REMOTE CONTROL ENGINE STARTER COLLATION .
B2781 STEERING LOCK CM CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2781 STEERING LOCK CM CONTROL CIRCUIT .
B2782 STEERING LOCK DRIVE REQUEST SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2782 STEERING LOCK DRIVE REQUEST SIGNAL CORRELATION .
B2784 ANTENNA CIRCUIT (PUSH ENGINE SWITCH) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2784 ANTENNA CIRCUIT (PUSH ENGINE SWITCH) .
B2785 LIN COMMUNICATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2785 LIN COMMUNICATION .
B2786 STEERING LOCK CM COMMUNICATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2786 STEERING LOCK CM COMMUNICATION .
B2788 IGN SIGNAL CORRELATION (STEERING LOCK CM) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2788 IGN SIGNAL CORRELATION (STEERING LOCK CM) .
B2789 ID CODE BOX COMMUNICATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2789 ID CODE BOX COMMUNICATION .
B278A PUSH ENGINE SWITCH POWER SUPPLY CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B278A PUSH ENGINE SWITCH POWER SUPPLY CIRCUIT .
B278B CAN CONTROL MODULE STUCK Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B278B CAN CONTROL MODULE STUCK .
B278D ID CODE BOX JUDGMENT CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B278D ID CODE BOX JUDGMENT CIRCUIT .
B2790 ID CODE BOX CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2790 ID CODE BOX CIRCUIT .
B2793 BACKUP POWER Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2793 BACKUP POWER .
B27A1 DRIVER SIDE EXTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A1 DRIVER SIDE EXTERNAL ANTENNA OPEN .
B27A2 PASSENGER SIDE EXTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A2 PASSENGER SIDE EXTERNAL ANTENNA OPEN .
B27A5 FRONT INTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A5 FRONT INTERNAL ANTENNA OPEN .
B27A6 REAR INTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A6 REAR INTERNAL ANTENNA OPEN .
B27A7 TRUNK/REAR GATE INTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A7 TRUNK/REAR GATE INTERNAL ANTENNA OPEN .
B27A8 TRUNK/REAR GATE EXTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A8 TRUNK/REAR GATE EXTERNAL ANTENNA OPEN .
U0074 CONTROL MODULE COMMUNICATION BUS "BODY-CAN" OFF Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0074 CONTROL MODULE COMMUNICATION BUS "BODY-CAN" OFF .
U0100 LOST COMMUNICATION WITH ECM/PCM "A" Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" .
U0101 LOST COMMUNICATION WITH TCM Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0101 LOST COMMUNICATION WITH TCM .
U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE .
U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE .
U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" .
U1140 LOST COMMUNICATION WITH BODY CONTROL MODULE BODY-CAN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1140 LOST COMMUNICATION WITH BODY CONTROL MODULE BODY-CAN .
U1422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE BODY-CAN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE BODY-CAN .
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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
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