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HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESLAN SYSTEM (DIAGNOSTICS)DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC U0427: INVALID DATA RECEIVED FROM VEHICLE SECURITY CONTROL MODULETROUBLE SYMPTOM
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

DTC U0427: Invalid Data Received From Vehicle Security Control Module: Trouble Symptom

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Trouble Symptom

Cooperation control of keyless access does not operate properly.

CAUTION: When the keyless access Control Module is replaced, registration of the immobilizer is required. For the relevant procedures, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".
DTC PROCEDURE

Step Check Yes No
1 CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE  . Was the basic diagnostic procedure performed up to step 8? Go to step 2  . Perform the basic diagnostic procedure. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >
2 CHECK DTC  .
Check the displayed DTC.		 Are DTCs other than U*** displayed? Perform the diagnosis according to DTC. Go to step 3  .
3 CHECK DTC  .
Check the displayed DTC.		 Is DTC for the bus off or the data no-receive displayed? Perform the diagnosis according to DTC. Go to step 4  .
4 CHECK DTC  .
Check the displayed DTC.		 Is U0427 a current malfunction? Go to step 5  . Go to step 9  .
5 CHECK DTC  .
  1. Turn the ignition switch to OFF.
  2. Disconnect the keyless access Control Module connector.
  3. Connect the disconnected connectors.
  4. Read the DTC using Subaru Select Monitor.
 Is U0427 a current malfunction? Go to step 6  . Go to step 9  .
6 CHECK DTC  .
Using the Subaru Select Monitor, read DTC of all the systems.		 Is the smart data abnormal detected in several modules? Replace the keyless access Control Module. < Ref. to KEYLESS ACCESS Control Module . > Go to step 7  .
7 REPLACE MODULE  .
  1. Replace the keyless access Control Module.
    CAUTION: Do not register the immobilizer.
  2. Read the DTC using Subaru Select Monitor.
 Is U0427 a current malfunction? Go to step 8  . System is normal.
8 CHECK MODULE  .
  1. Reinstall the keyless access Control Module.
  2. Replace the body integrated unit. < Ref. to BODY INTEGRATED UNIT . >
  3. Read the DTC using Subaru Select Monitor.
 Is U0427 a current malfunction? Replace the keyless access Control Module. < Ref. to KEYLESS ACCESS Control Module . > System is normal.
9 CHECK HARNESS  .
  1. Shake the harness, and check for poor contact.
  2. Read the DTC using Subaru Select Monitor.
 Is U0427 a current malfunction? Repair the poor contact of harness, or replace the harness. Go to step 10  .
10 CHECK CONNECTOR  .
Check the connector used for high speed CAN for poor contact.		 Is there poor contact of connector? Repair the connector that has poor contact, or replace harness. It is possible that temporary poor communication occurs. Delete the DTC.
RENDER: 1.0x

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