DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit [08/2019 - ]: Procedure
- CHECK CONNECTOR CONNECTION
- Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (inside luggage).
OK
Connectors are properly connected.
Result
Proceed to OK NG
Result:
NG
CONNECT CONNECTORS PROPERLY
Result:
OK
See step 2
- Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (inside luggage).
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE))
- Disconnect the F112 and F113 certification ECU (smart key ECU assembly) connectors.
- Disconnect the O14 No. 1 indoor electrical key antenna assembly (inside luggage) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F112-4 (CLG7) - O14-1 (ANTE7) Always Below 1 Ω F112-3 (CG7B) - O14-2 (CLGB) Always Below 1 Ω F113-11 (E) - Body ground Always Below 1 Ω F112-4 (CLG7) or O14-1 (ANTE7) - Body ground Always 10 kΩ or higher F112-3 (CG7B) or O14-2 (CLGB) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE))
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))*b Waveform 1 *c For 30 seconds after closing any door using the door outside handle *d 30 seconds or more have elapsed after closing any door using the door outside handle - Using an oscilloscope, check the waveform.
OK
Tester Connection Condition Tool Setting Specified Condition F112-4 (CLG7) - F113-11 (E) Procedure: - Engine switch off
- Electrical key transmitter sub-assembly not inside vehicle
- Within 30 seconds of closing any door using the door outside handle
2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)F112-3 (CG7B) - F113-11 (E) Procedure: - Engine switch off
- Electrical key transmitter sub-assembly not inside vehicle
- Within 30 seconds of closing any door using the door outside handle
2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)Result
Proceed to OK NG
Result:
NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [08/2019 - ]
Result:
OK
See step 4
- Using an oscilloscope, check the waveform.
- REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)
- Temporarily replace the No. 1 indoor electrical key antenna assembly (inside luggage) with a new one.
Refer to REMOVAL [08/2015 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 5
- Temporarily replace the No. 1 indoor electrical key antenna assembly (inside luggage) with a new one.
- CLEAR DTC
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [08/2019 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 6
- Clear the DTCs.
- CHECK FOR DTC
- Check for DTCs.
Refer to DTC CHECK / CLEAR [08/2019 - ]
OK
DTC B27A7 is not output.
Result
Proceed to OK NG
Result:
OK
END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE) WAS DEFECTIVE)
Result:
NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [08/2019 - ]
- Check for DTCs.