DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK CONNECTOR CONNECTION CONDITION
- Turn the power switch off.
- Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and the No. 3 indoor electrical key antenna assembly (for rear floor).
OK
Connectors are properly connected.
NG → CONNECT CONNECTORS PROPERLY
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY)
- Disconnect the certification ECU (smart key ECU assembly) connector.
- Disconnect the No. 3 indoor electrical key antenna assembly (for rear floor) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition L62-26 (CLG7) - R50-1 (ANTE7) Always Below 1 Ω L62-27 (CG7B) - R50-3 (CLGB) Always Below 1 Ω L62-26 (CLG7) - Body ground Always 10 kΩ or higher L62-27 (CG7B) - Body ground Always 10 kΩ or higher R50-1 (ANTE7) - Body ground Always 10 kΩ or higher R50-3 (CLGB) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY SIGNAL OUTPUT)
- Reconnect the certification ECU (smart key ECU assembly) connector.
- Measure the resistance and check for pulses according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition L62-15 (E) - Body ground Always Below 1 Ω Standard
Tester Connection Condition Specified Condition L62-26 (CLG7) - L62-15 (E) - Power switch off
- All doors closed
- Key not in cabin
- Door outside handle assembly (lock sensor) not touched
No pulse generation L62-26 (CLG7) - L62-15 (E) - Power switch off
- All doors closed
- Key not in cabin
- Door outside handle assembly (lock sensor) touched
Pulse generation L62-27 (CG7B) - L62-15 (E) - Power switch off
- All doors closed
- Key not in cabin
- Door outside handle assembly (lock sensor) not touched
No pulse generation L62-27 (CG7B) - L62-15 (E) - Power switch off
- All doors closed
- Key not in cabin
- Door outside handle assembly (lock sensor) touched
Pulse generation TEXT IN ILLUSTRATION*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
NG → See step 6
OK: Go to next step
- REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (for Rear Floor)
- Replace the No. 3 indoor electrical key antenna assembly (for rear floor). Refer to REMOVAL .
NEXT: Go to next step
- CHECK DTC OUTPUT
- Clear the DTCs. Refer to DTC CHECK / CLEAR .
- Recheck for DTCs.
OK
DTC B27A7 is not output.
NG → See step 6
OK → END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY WAS DEFECTIVE)
- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL