THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Entry Function (NR Series)) B27A1 Open in Driver Side Electrical Antenna Circuit
DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly (for driver door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly (for driver door) (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the driver door at intervals of 0.25 seconds. DTC B27A1 is stored by the certification ECU (smart key ECU assembly) when an open is detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (electrical key antenna) (between terminals CLG1 and ANT1, or terminals CG1B and ANT2).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B27A1 | Open in Driver Side Electrical Antenna Circuit | An open is detected in the circuit between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (CLG1 - ANT1, CG1B - ANT2) (This is detected by the malfunction detection circuit in the certification ECU (smart key ECU assembly)) (1 trip detection logic*). | ·
Certification ECU (smart key ECU assembly) ·
Front door outside handle assembly (for driver door) ·
Harness or connector |
DTC Output Confirmation Operation:
Any time |
*: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Entry lock/unlock operation cannot be performed for driver door | - |
| DTC No. | Data List and Active Test |
|---|---|
| B27A1 | Key diagnostic mode can be used to perform troubleshooting |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
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.
·The smart entry and start system (for Entry Function) uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.
·Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door).
- OK:
Connectors are properly connected.
- Result:
Proceed to OK NG
OK
NG
Disconnect the O61 certification ECU (smart key ECU assembly) connector.
Disconnect the L3 front door outside handle assembly (for driver door) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition O61-17 (CLG1) - L3-6 (ANT1) Always Below 1 Ω O61-16 (CG1B) - L3-4 (ANT2) Always Below 1 Ω
Reconnect the O61 certification ECU (smart key ECU assembly) connector.
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
*b | Waveform 1 |
| *c | Waveform 2 | *d | Waveform 3 |
| *e | Waveform 4 | - | - |
Using an oscilloscope, check the waveform.
- OK:
Tester Connection Condition Tool Setting Specified Condition O61-17 (CLG1) - I1-18 (E) Procedure:
1.Engine switch off
2.All doors closed
3.Electrical key transmitter sub-assembly not inside vehicle
4.All doors locked through wireless operation
(electrical key transmitter sub-assembly brought inside detection area*)
5 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)Procedure:
1.Engine switch off
2.All doors closed
3.Electrical key transmitter sub-assembly not inside vehicle
4.All doors locked through wireless operation
(electrical key transmitter sub-assembly brought outside detection area*)
5 V/DIV., 100 ms/DIV. Pulse generation
(See waveform 2)O61-16 (CG1B) - I1-18 (E) Procedure:
1.Engine switch off
2.All doors closed
3.Electrical key transmitter sub-assembly not inside vehicle
4.All doors locked through wireless operation
(electrical key transmitter sub-assembly brought inside detection area*)
5 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 3)Procedure:
1.Engine switch off
2.All doors closed
3.Electrical key transmitter sub-assembly not inside vehicle
4.All doors locked through wireless operation
(electrical key transmitter sub-assembly brought outside detection area*)
5 V/DIV., 100 ms/DIV. Pulse generation
(See waveform 4)
*: For details about the entry function detection area, refer to Operation Check.
- Result:
Proceed to OK NG
OK
NG