CHECK CONNECTION OF CONNECTORS
CHECK REAR FLOOR SIDE AIRBAG SENSOR CIRCUIT
CHECK REAR FLOOR SIDE AIRBAG SENSOR
DTC B1676/85 Lost Communication with Rear Floor Airbag Sensor RH |
DTC B1677/85 Rear Floor Airbag Sensor RH Initialization Incomplete |
DESCRIPTION
- HINT:
- "Rear floor side airbag sensor RH" refers to the rear floor side airbag sensor.
The rear floor side airbag sensor detects impacts to the vehicle and sends signals to the center airbag sensor to determine if the airbag should be deployed.
DTC B1676/85 or B1677/85 is stored when a malfunction is detected in the rear floor side airbag sensor circuit
| DTC Code | DTC Detection Condition | Trouble Area |
| B1676/85 | One of the following conditions is met:
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| B1677/85 | One of the following conditions is met:
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WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (LandCruiser RM000003YMD00TX.html).
- When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).
| 1.CHECK CONNECTION OF CONNECTORS |
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check that the connectors are properly connected to the center airbag sensor and rear floor side airbag sensor.
- OK:
- The connectors are properly connected.
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| OK | |
| 2.CHECK CONNECTORS |
Disconnect the connectors from the center airbag sensor and rear floor side airbag sensor.
Check that the connectors (on the center airbag sensor side and rear floor side airbag sensor side) are not damaged.
- OK:
- The connectors are not deformed or damaged.
Text in Illustration *1 Rear Floor Side Airbag Sensor *2 Center Airbag Sensor
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| OK | |
| 3.CHECK REAR FLOOR SIDE AIRBAG SENSOR CIRCUIT |
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Text in Illustration *1 Rear Floor Side Airbag Sensor *2 Center Airbag Sensor *3 Floor Wire *4 Connector C *5 Connector B *6 Service Wire *a Front view of wire harness connector
(to Rear Floor Side Airbag Sensor)*b Rear view of wire harness connector
(to Center Airbag Sensor)
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition Q5-2 (BER+) - Body ground Ignition switch ON Below 1 V Q5-1 (BER-) - Body ground Ignition switch ON Below 1 V
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 15 (BCR+) and 14 (BCR-) of connector B.
- NOTICE:
- Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Q5-2 (BER+) - Q5-1 (BER-) Always Below 1 Ω
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Q5-2 (BER+) - Q5-1 (BER-) Always 1 MΩ or higher Q5-2 (BER+) - Body ground Always 1 MΩ or higher Q5-1 (BER-) - Body ground Always 1 MΩ or higher
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| OK | |
| 4.CHECK REAR FLOOR SIDE AIRBAG SENSOR |
Connect the connectors to the center airbag sensor.
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Temporarily replace the rear floor side airbag sensor with a new one.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs stored in memory (LandCruiser RM000000XFE0NGX.html).
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs (LandCruiser RM000000XFE0NGX.html).
- OK:
- DTC B1676 and B1677 are not output.
- HINT:
- Codes other than DTC B1676 and B1677 may be output at this time, but they are not related to this check.
Text in Illustration *1 Rear Floor Side Airbag Sensor *2 Center Airbag Sensor
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| OK | ||
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