Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK REAR SEAT OUTER BELT LH (REAR PRETENSIONER SQUIB LH)
CHECK FLOOR WIRE (REAR PRETENSIONER SQUIB LH CIRCUIT)
DTC B1925/78 Short in Rear Pretensioner Squib LH Circuit
DTC B1926/78 Open in Rear Pretensioner Squib LH Circuit
DTC B1927/78 Short to GND in Rear Pretensioner Squib LH Circuit
DTC B1928/78 Short to B+ in Rear Pretensioner Squib LH Circuit
DESCRIPTION
The rear pretensioner squib LH circuit consists of the center airbag sensor and the rear 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 rear pretensioner squib LH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1925/78 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the rear pretensioner squib LH circuit during the primary check. A rear pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat outer belt assembly LH (Rear pretensioner squib LH) Center airbag sensor assembly |
| B1926/78 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the rear pretensioner squib LH circuit for 2 seconds. A rear pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat outer belt assembly LH (Rear pretensioner squib LH) Center airbag sensor assembly |
| B1927/78 | When one of the following conditions is met: The center airbag sensor receives a short circuit to ground signal in the rear pretensioner squib LH circuit for 0.5 seconds. A rear pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat outer belt assembly LH (Rear pretensioner squib LH) Center airbag sensor assembly |
| B1928/78 | When one of the following conditions is met: The center airbag sensor receives a short circuit to B+ signal in the rear pretensioner squib LH circuit for 0.5 seconds. A rear pretensioner squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat outer belt assembly LH (rear 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 REAR SEAT OUTER BELT LH (REAR 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 rear 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 rear seat outer belt LH (rear 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 B1925, B1926, B1927 or B1928 is not output.
- HINT:
- Codes other than DTC B1925, B1926, B1927 and B1928 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 rear seat outer belt LH side) is not damaged.
- OK:
- The lock button is not disengaged, and the claw of the lock is not damaged or deformed.
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| OK | |
| 3.CHECK FLOOR WIRE (REAR 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 K13-1 (RL+) - Body ground Ignition switch ON Below 1 V K13-2 (RL-) - 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 K13-1 (RL+) - K13-2 (RL-) 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 K13-1 (RL+) - K13-2 (RL-) Always 1 MΩ or higher K13-1 (RL+) - Body ground Always 1 MΩ or higher K13-2 (RL-) - Body ground Always 1 MΩ or higher
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| OK | |
| 4.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the rear 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 B1925, B1926, B1927 or B1928 is not output.
- HINT:
- Codes other than DTC B1925, B1926, B1927 or B1928 may be output at this time, but they are not related to this check.
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| OK | ||
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