DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK FOR DTC
CHECK SEAT BELT CONTROL ECU
CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT - SEAT BELT CONTROL ECU)
DTC B2075 Passenger Side Seat Belt Buckle Switch Circuit Malfunction
DESCRIPTION
This DTC is stored when there is a malfunction in the front seat inner belt buckle switch circuit for the passenger side.
| DTC Code | DTC Detection Condition | Trouble Area |
| B2075 |
Malfunction in the front seat inner belt (buckle switch) circuit. |
Harness or connector
Front seat inner belt (for passenger side)
Seat belt control ECU
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WIRING DIAGRAM
INSPECTION PROCEDURE
- OK:
- DTC B2075 is not output
| OK | |
| |
| USE SIMULATION METHOD TO CHECK ()
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| 2.CHECK SEAT BELT CONTROL ECU |
Reconnect the E41 seat belt control ECU connector.
Disconnect the c30*1 or c24*2 front seat inner belt connector.
Use an oscilloscope to check the waveform of the seat belt control ECU between the connector terminals.
Measurement Condition| Tester Connection | E41-5 (PBK+) - E41-6 (PBK-) |
| Tool Setting | 5 V/DIV., 20 ms./DIV. |
| Switch Condition | Ignition switch ON
Front passenger side seat belt unfastened (Buckle switch off) |
Ignition switch ON
Front passenger side seat belt fastened (Buckle switch on) |
Result| Result | Proceed to |
OK
(for LHD) | A |
OK
(for RHD) | B |
| NG | C |
| | REPLACE SEAT BELT CONTROL ECU ()
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| A | |
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| REPLACE SEAT BELT CONTROL ECU ()
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| 3.CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT - SEAT BELT CONTROL ECU) |
Disconnect the c30*1 or c24*2 front seat inner belt connector.
Disconnect the E41 seat belt control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD| Tester Connection | Condition | Specified Condition |
| c30-2 (+) - E41-5 (PBK+) | Always | Below 1 Ω |
| c30-1 (E) - E41-6 (PBK-) |
| c30-2 (+) or E41-5 (PBK+) - Body ground | 1 MΩ higher |
| c30-1 (E) or E41-6 (PBK-) - Body ground |
for RHD| Tester Connection | Condition | Specified Condition |
| c24-2 (+) - E41-5 (PBK+) | Always | Below 1 Ω |
| c24-1 (E) - E41-6 (PBK-) |
| c24-2 (+) or E41-5 (PBK+) - Body ground | 1 MΩ higher |
| c24-1 (E) or E41-6 (PBK-) - Body ground |
Result| Result | Proceed to |
OK
(for LHD) | A |
OK
(for RHD) | B |
| NG | C |
| | REPLACE FRONT SEAT INNER BELT LH (for Passenger Side) ()
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| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| A | |
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| REPLACE FRONT SEAT INNER BELT RH (for Passenger Side) ()
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