Dtc B27A5 Open In Front Floor Electrical Key Oscillator Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CONNECTOR CONNECTION

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY [FRONT FLOOR])

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY [FRONT FLOOR])

REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)

CLEAR DTC

CHECK FOR DTC

DESCRIPTION

1. *: Only output while a malfunction is present.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. The entry and start system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly (Click here).
   
2. When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
   
3. Before replacing the certification ECU (smart key ECU assembly), refer to entry and start system (for Entry Function) (Click here).
   
4. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
   

1. 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.
   

1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.
   

2. Disconnect the E126 No. 1 indoor electrical key antenna assembly (front floor) connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E130-21 (CLG5) - E126-1 (ANTE5)	Always	Below 1 Ω
   E130-20 (CG5B) - E126-3 (CLGB)	Always	Below 1 Ω
   E130-11 (E) - Body ground	Always	Below 1 Ω
   E130-21 (CLG5) or E126-1 (ANTE5) - Body ground	Always	10 kΩ or higher
   E130-20 (CG5B) or E126-3 (CLGB) - Body ground	Always	10 kΩ or higher

4. Reconnect the E130 certification ECU (smart key ECU assembly) connector.
   

1. Connect the E130 certification ECU (smart key ECU assembly) connector.
   

   
   
   
   
   

   Text in Illustration

   *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

2. Using an oscilloscope, check the waveform.
   
   

   OK:

   
   

   Tester Connection	Switch Condition	Tool Setting	Specified Condition
   E130-21 (CLG5) - E130-11 (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)
   E130-20 (CG5B) - E130-11 (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)

1. Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new one (Click here).
   

1. Clear the DTCs (Click here).
   

1. Check for DTCs (Click here).
   

   OK:

   DTC B27A5 is not output.