CHECK FRONT SEAT OUTER BELT RH (FRONT PRETENSIONER SQUIB RH)
CHECK FLOOR WIRE (FRONT PRETENSIONER SQUIB RH CIRCUIT)
DTC B1900/73 Short in Front Pretensioner Squib RH Circuit |
DTC B1901/73 Open in Front Pretensioner Squib RH Circuit |
DTC B1902/73 Short to GND in Front Pretensioner Squib RH Circuit |
DTC B1903/73 Short to B+ in Front Pretensioner Squib RH Circuit |
DESCRIPTION
The front pretensioner squib RH circuit consists of the center airbag sensor and front seat outer belt RH.This circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the front pretensioner squib RH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1900/73 | One of the following conditions is met:
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| B1901/73 | One of the following conditions is met:
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| B1902/73 | One of the following conditions is met:
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| B1903/73 | 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).
- HINT:
- To perform the simulation method, enter check mode (signal check) with the intelligent tester (LandCruiser RM000000XFF0H0X.html), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (LandCruiser RM000000XFD0N3X.html).
| 1.CHECK FRONT SEAT OUTER BELT RH (FRONT PRETENSIONER SQUIB RH) |
Turn the ignition switch off.
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Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect the connectors from the front seat outer belt RH.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the front seat outer belt RH (front pretensioner squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.
- NOTICE:
- Do not forcibly insert SST into the terminals of the connector when connecting SST.
- Insert SST straight into the terminals of the connector.
- SST
- 09843-18061
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 (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 B1900, B1901, B1902 or B1903 is not output.
- HINT:
- Codes other than DTC B1900, B1901, B1902 and B1903 may be output at this time, but they are not related to this check.
Result Result Proceed to OK (for 3 Door) A OK (for 5 Door) B NG C Text in Illustration *1 Front Pretensioner Squib RH *2 Center Airbag Sensor *3 Connector C *4 SST *a Front view of wire harness connector
(to Front Pretensioner Squib RH)
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| C | |
| 2.CHECK CONNECTOR |
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector C.
Check that the floor wire connector (on the front seat outer belt RH side) is not damaged.
- OK:
- The lock button is not disengaged, and the claw of the lock is not deformed or damaged.
Text in Illustration *1 Front Pretensioner Squib RH *2 Center Airbag Sensor
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| OK | |
| 3.CHECK FLOOR WIRE (FRONT PRETENSIONER SQUIB RH CIRCUIT) |
Disconnect the connectors from the center airbag sensor.
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Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition Q2-1 (R+) - Body ground Ignition switch ON Below 1 V Q2-2 (R-) - 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.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Q2-1 (R+) - Q2-2 (R-) Always Below 1 Ω
Release the activation prevention mechanism built into connector B (LandCruiser RM000000XFD0N3X.html).
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Q2-1 (R+) - Q2-2 (R-) Always 1 MΩ or higher Q2-1 (R+) - Body ground Always 1 MΩ or higher Q2-2 (R-) - Body ground Always 1 MΩ or higher
| *1 | Front Pretensioner Squib RH |
| *2 | Floor Wire |
| *3 | Center Airbag Sensor |
| *4 | Connector C |
| *a | Front view of wire harness connector (to Front Pretensioner Squib RH) |
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| OK | |
| 4.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the front seat outer belt RH and center airbag sensor.
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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 B1900, B1901, B1902 or B1903 is not output.
- HINT:
- Codes other than DTC B1900, B1901, B1902 and B1903 may be output at this time, but they are not related to this check.
Text in Illustration *1 Front Pretensioner Squib RH *2 Center Airbag Sensor
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| OK | ||
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