DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [12/2013 - ]: 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 (front floor).
OK
Connectors are properly connected.
Result
Proceed to OK NG
Result: 2
NG
CONNECT CONNECTORS PROPERLY
Result: 1
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 (front floor).
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))
- Disconnect the F13 certification ECU (smart key ECU assembly) connector.
- Disconnect the F39 No. 1 indoor electrical key antenna assembly (front floor) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F13-21 (CLG5) - F39-1 (ANTE5) Always Below 1 Ω F13-20 (CG5B) - F39-3 (CLGB) Always Below 1 Ω F13-11 (E) - Body ground Always Below 1 Ω F13-21 (CLG5) or F39-1 (ANTE5) - Body ground Always 10 kΩ or higher F13-20 (CG5B) or F39-3 (CLGB) - Body ground Always 10 kΩ or higher - Reconnect the F13 certification ECU (smart key ECU assembly) connector.
Result
Proceed to OK NG
Result: 2
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result: 1
OK
See step 3
- INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))
*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 F13-21 (CLG5) - F13-11 (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)F13-20 (CG5B) - F13-11 (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: 2
NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [12/2013 - ]
Result: 1
OK
See step 4
- Using an oscilloscope, check the waveform.
- REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)
- Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new one.
Refer to REMOVAL [12/2013 - ]
NEXT
- Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new one.
- CLEAR DTC
- Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
NEXT
- Clear the DTCs.
- CHECK FOR DTC
- Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
OK
DTC B27A5 is not output.
Result
Proceed to OK NG
Result: 1
OK
END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) WAS DEFECTIVE)
Result: 2
NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [12/2013 - ]
- Check for DTCs.