DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit [12/2017 - ]: Procedure
- CHECK CONNECTOR CONNECTION
- Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and No. 3 indoor electrical key antenna assembly (inside luggage compartment).
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. 3 indoor electrical key antenna assembly (inside luggage compartment).
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT))
- Disconnect the R1 and J41 certification ECU (smart key ECU assembly) connectors.
- Disconnect the R20*1, T9*2 No. 3 indoor electrical key antenna assembly (inside luggage compartment) connector.
- *1: w/o Rear No. 2 Seat
- *2: w/ Rear No. 2 Seat
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
W/O REAR NO. 2 SEAT:Tester Connection Condition Specified Condition R1-11 (CLG7) - R20-1 (ANTE7) Always Below 1 Ω R1-10 (CG7B) - R20-3 (CLGB) Always Below 1 Ω J41-18 (E) - Body ground Always Below 1 Ω R1-11 (CLG7) or R20-1 (ANTE7) - Body ground Always 10 kΩ or higher R1-10 (CG7B) or R20-3 (CLGB) - Body ground Always 10 kΩ or higher W/ REAR NO. 2 SEAT:Tester Connection Condition Specified Condition R1-11 (CLG7) - T9-1 (ANTE7) Always Below 1 Ω R1-10 (CG7B) - T9-3 (CLGB) Always Below 1 Ω J41-18 (E) - Body ground Always Below 1 Ω R1-11 (CLG7) or T9-1 (ANTE7) - Body ground Always 10 kΩ or higher R1-10 (CG7B) or T9-3 (CLGB) - Body ground Always 10 kΩ or higher - Reconnect the R1 and J41 certification ECU (smart key ECU assembly) connectors.
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. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT))
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))*b Waveform 1 *c For 30 seconds after any door closed *d After 30 seconds or more have elapsed since any door closed - Using an oscilloscope, check the waveform.
OK
Tester Connection Condition Tool Setting Specified Condition R1-11 (CLG7) - J41-18 (E) Procedure: - Engine switch off
- Electrical key transmitter sub-assembly not inside vehicle
- Within 30 seconds of closing any door
2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)R1-10 (CG7B) - J41-18 (E) Procedure: - Engine switch off
- Electrical key transmitter sub-assembly not inside vehicle
- Within 30 seconds of closing any door
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 [08/2016 - 08/2019] , or refer to REMOVAL [08/2019 - ]
Result:
OK
See step 4
- Using an oscilloscope, check the waveform.
- REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT)
- Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage compartment) with a new or known good one.
w/o Rear No. 2 Seat: Refer to REMOVAL [09/2015 - ]
w/ Rear No. 2 Seat: Refer to REMOVAL [12/2017 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 5
- Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage compartment) with a new or known good one.
- CLEAR DTC
Result:
NEXT
See step 6
- CHECK FOR DTC
- Check for DTCs.
Body Electrical > Smart Access > Trouble Codes
OK
DTC B27A7 is not output.
Result
Proceed to OK NG
Result:
OK
END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT) WAS DEFECTIVE)
Result:
NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [08/2016 - 08/2019] , or refer to REMOVAL [08/2019 - ]
- Check for DTCs.