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Home >> Toyota >> 2015 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (Keyless Entry) - (Diagnostic Codes & Symptom Tests) >> Smart Key System (For Entry Function) >> DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [08/2014 - ] >> Inspection Procedure
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Inspection Procedure

NOTE:
  • The smart key system (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] . Troubleshoot the smart key system (for Entry Function) after confirming that the communication systems are functioning properly.
  • When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.
  • Before replacing the certification ECU, refer to the engine immobilizer system (w/ Smart Key System). Refer to REGISTRATION [08/2014 - ] .
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