LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2011 >> RX 450h 3.5 C >> Repair and Diagnosis >> External Pages >> Different car >> Section 233 (Smart Access System With Push-Button Start (For Entry Function) (Diagnostics - Introduction)) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> Diagnostic Trouble Code Chart >> Diagnostic Trouble Code Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2011 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

If a trouble code is stored during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See" below.

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

DTC Code Detection Item Trouble Area See
B27A1 Open in Driver Side Electrical Antenna Circuit 1. Front door outside handle assembly (for driver side)
2. Certification ECU (Smart key ECU assembly)
3. Wire harness or connector		 Refer to DTC B27A1: Open in Driver Side Electrical Antenna Circuit
B27A2 Open in Front Passenger Side Electrical Antenna Circuit 1. Front door outside handle assembly (for front passenger side)
2. Certification ECU (Smart key ECU assembly)
3. Wire harness or connector		 Refer to DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit
B27A5 Open in Front Floor Electrical Key Oscillator Circuit 1. Indoor electrical key oscillator (for front floor)
2. Certification ECU (smart key ECU assembly)
3. Wire harness or connector		 Refer to DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit
B27A6 Open in Rear Floor Electrical Key Oscillator Circuit 1. Indoor electrical key oscillator (for center floor)
2. Certification ECU (smart key ECU assembly)
3. Wire harness or connector		 Refer to DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit
B27A7 Open in Inside Luggage Compartment Electrical Key Oscillator Circuit 1. Indoor electrical key oscillator (for rear floor)
2. Certification ECU (smart key ECU assembly)
3. Wire harness or connector		 Refer to DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit
B27A8 Open in Outside Luggage Compartment Electrical Key Antenna Circuit 1. Outside electrical key oscillator (for rear side)
2. Certification ECU (smart key ECU assembly)
3. Wire harness or connector		 Refer to DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit
scientia non olet · About LEMON Manuals