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Home >> Subaru >> 2021 >> Forester 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
U0074 CONTROL MODULE COMMUNICATION BUS "BODY-CAN" OFF -
U0100 Lost Communication With ECM/PCM "A" -
U0101 Lost Communication With TCM -
U0122 Lost Communication With Vehicle Dynamics Control Module -
U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module -
U0401 Invalid Data Received From ECM/PCM "A" -
U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE -
U1120 LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE -
U1140 LOST COMMUNICATION WITH BODY CONTROL MODULE BODY-CAN -
U1198 LOST COMMUNICATION WITH TELEMATICS SYSTEM -
U1422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE BODY-CAN -
B2271 IGN relay control circuit -
B2274 ACC relay control circuit -
B2275 Engine start request control circuit -
B2276 ACC relay off signal -
B2277 Keyless access control module (water detection) -
B227B PUSH ENGINE START SWITCH INPUT PERFORMANCE -
B227C P RANGE SIGNAL PERFORMANCE -
B2285 Steering lock position signal correlation -
B2286 Engine speed signal(without Auto Start Stop) -
B228A ENGINE SPEED SIGNAL(WITH AUTO START STOP) -
B2781 Steering Lock control module control circuit -
B2782 Steering lock drive request signal correlation -
B2785 LIN communication -
B2786 Steering Lock control module communication -
B2788 IGN signal correlation (Steering Lock control module) -
B2789 ID Code Box communication -
B278B CAN CONTROL MODULE STUCK -
B278D ID Code Box judgment circuit -
B2793 BACKUP POWER -

Diagnostic procedure:

  1. Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
  2. Using the Subaru Select Monitor, perform the clear memory of [Keyless Access with Push Button Start]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
  3. Using the Subaru Select Monitor, read the DTC of [Keyless Access with Push Button Start] to check that there is no DTC displayed. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>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. After solving the DTC, repeat from step 1).
  4. Start the engine, and let it idle for 40 seconds or more.
  5. Using the Subaru Select Monitor, read the DTC of [Keyless Access with Push Button Start] to check that there is no DTC displayed. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>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. After solving the DTC, repeat from step 1).