Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK FRONT SEAT OUTER BELT LH (FRONT PRETENSIONER SQUIB LH)
CHECK FLOOR WIRE (FRONT PRETENSIONER SQUIB LH CIRCUIT)
DTC B1905/74 Short in Front Pretensioner Squib LH Circuit
DTC B1906/74 Open in Front Pretensioner Squib LH Circuit
DTC B1907/74 Short to GND in Front Pretensioner Squib LH Circuit
DTC B1908/74 Short to B+ in Front Pretensioner Squib LH Circuit
DESCRIPTION
The front pretensioner squib LH circuit consists of the center airbag sensor and the front seat outer belt LH.
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 LH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1905/74 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the front pretensioner squib LH circuit during the primary check. A front pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat outer belt assembly LH (Front pretensioner squib LH) Center airbag sensor assembly |
| B1906/74 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the front pretensioner squib LH circuit for 2 seconds. A front pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat outer belt assembly LH (Front pretensioner squib LH) Center airbag sensor assembly |
| B1907/74 | When one of the following conditions is met: The center airbag sensor receives a short circuit to ground signal in the front pretensioner squib LH circuit for 0.5 seconds. A front pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat outer belt assembly LH (Front pretensioner squib LH) Center airbag sensor assembly |
| B1908/74 | When one of the following conditions is met: The center airbag sensor receives a short circuit to B+ signal in the front pretensioner squib LH circuit for 0.5 seconds. A front pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat outer belt assembly LH (Front pretensioner squib LH) Center airbag sensor assembly |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- HINT:
- To perform the simulation method, enter the check mode (signal check) with the intelligent tester (), and then wiggle each connector of the airbag system or drive the vehicle on various type of road ().
| 1.CHECK FRONT SEAT OUTER BELT LH (FRONT PRETENSIONER SQUIB LH) |
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect the connectors from the front seat outer belt LH.
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 LH (front pretensioner squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.
- NOTICE:
- 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 ().
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs ().
- OK:
- DTC B1905, B1906, B1907 or B1908 is not output.
- HINT:
- Codes other than DTC B1905, B1906, B1907 and B1908 may be output at this time, but they are not related to this check.
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| OK | ||
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| 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 LH side) is not damaged.
- OK:
- The lock button is not disengaged, and the claw of the lock is not deformed or damaged.
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| OK | |
| 3.CHECK FLOOR WIRE (FRONT PRETENSIONER SQUIB LH CIRCUIT) |
Disconnect the connectors from the center airbag sensor.
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 K1-1 (L+) - Body ground Ignition switch ON Below 1 V K1-2 (L-) - 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 K1-1 (L+) - K1-2 (L-) Always Below 1 Ω
Release the activation prevention mechanism built into connector B ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition K1-1 (L+) - K1-2 (L-) Always 1 MΩ or higher K1-1 (L+) - Body ground Always 1 MΩ or higher K1-2 (L-) - Body ground Always 1 MΩ or higher
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| OK | |
| 4.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the front seat outer belt LH and the center airbag sensor.
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 ().
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs ().
- OK:
- DTC B1905, B1906, B1907 or B1908 is not output.
- HINT:
- Codes other than DTC B1905, B1906, B1907 and B1908 may be output at this time, but they are not related to this check.
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| OK | ||
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