Toyota 4Runner: Diagnostic Trouble Code Chart

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

HINT:

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

Certification ECU

DTC Code	Detection Item	Trouble Area
B27A1	Open in Driver Side Electrical Antenna Circuit	- Harness or connector - Front door outside handle assembly (for driver side) - Certification ECU
B27A2	Open in Front Passenger Side Electrical Antenna Circuit	- Harness or connector - Front door outside handle assembly (for front passenger side) - Certification ECU
B27A5	Open in Front Floor Electrical Key Oscillator Circuit	- Harness or connector - Indoor No. 1 electrical key antenna (front floor) - Certification ECU
B27A6	Open in Rear Floor Electrical Key Oscillator Circuit	- Harness or connector - Indoor No. 2 electrical key antenna (rear floor) - Certification ECU
B27A7	Open in Inside Luggage Compartment Electrical Key Oscillator Circuit	- Harness or connector - Indoor No. 2 electrical key antenna (inside luggage) - Certification ECU
B27A8	Open in Outside Luggage Compartment Electrical Key Antenna Circuit	- Harness or connector - Electrical key antenna (outside luggage) - Certification ECU

Open in Outside Luggage Compartment Electrical Key Antenna Circuit (B27A8)

DESCRIPTION The certification ECU generates a request signal and transmits the signal to the electrical key antenna (outside luggage). The electrical key antenna (outside luggage) detects that th ...

Open in Rear Floor Electrical Key Oscillator Circuit (B27A6)

DESCRIPTION The certification ECU generates a request signal and transmits the signal to the indoor No. 2 electrical key antenna (rear floor). The indoor No. 2 electrical key antenna (rear floor) ...

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Key information
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How To Proceed With Troubleshooting
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