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Home >> Subaru >> 2017 >> WRX Base >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security And Locks - Keyless Access (W/ Push Button Start) (Diagnostics) >> Inspection Mode >> Procedure >> Inspection Mode 1

Inspection Mode 1

DTC Item Note
U0073 CONTROL MODULE COMMUNICATION BUS OFF -
U0100 LOST COMMUNICATION WITH ECM/PCM "A" -
U0101 LOST COMMUNICATION WITH TCM -
U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE -
U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE -
U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE -
U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" -
U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE -
B2271 IGN RELAY CONTROL CIRCUIT -
B2274 ACC RELAY CONTROL CIRCUIT -
B2275 ENGINE START REQUEST CONTROL CIRCUIT -
B2276 ACC RELAY OFF SIGNAL -
B2277 SUBMERGING CIRCUIT -
B2285 STEERING LOCK POSITION SIGNAL CORRELATION -
B2286 ENGINE SPEED SIGNAL(WITHOUT Auto Start Stop) -
B2781 STEERING LOCK CM CONTROL CIRCUIT -
B2782 STEERING LOCK DRIVE REQUEST SIGNAL CORRELATION -
B2785 LIN COMMUNICATION -
B2786 STEERING LOCK CM COMMUNICATION -
B2788 IGN SIGNAL CORRELATION (STEERING LOCK CM) -
B2789 ID CODE BOX COMMUNICATION -
B278D ID CODE BOX JUDGMENT CIRCUIT -

Diagnostic procedure:

  1. Prepare for the inspection mode. <Ref. to PREPARATION FOR THE INSPECTION MODE , PROCEDURE, Inspection Mode.>
  2. Start the engine, and let it idle for 40 seconds or more.
  3. Read the DTC and check that the DTC is not displayed. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>
NOTE: If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs.