Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK REAR SEAT SIDE AIRBAG LH (REAR SIDE SQUIB LH)
CHECK FLOOR WIRE (REAR SIDE SQUIB LH CIRCUIT)
DTC B1855/63 Short in Rear Side Squib LH Circuit
DTC B1856/63 Open in Rear Side Squib LH Circuit
DTC B1857/63 Short to GND in Rear Side Squib LH Circuit
DTC B1858/63 Short to B+ in Rear Side Squib LH Circuit
DESCRIPTION
The rear side squib LH circuit consists of the center airbag sensor and the rear seat side airbag LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the rear side squib LH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1855/63 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the rear side squib LH circuit during the primary check. A rear side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat side airbag assembly LH (Rear side squib LH) Center airbag sensor assembly |
| B1856/63 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the rear side squib LH circuit for 2 seconds. A rear side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat side airbag assembly LH (Rear side squib LH) Center airbag sensor assembly |
| B1857/63 | When one of the following conditions is met: The center airbag sensor receives a short circuit to ground signal in the rear side squib LH circuit for 0.5 seconds. A rear side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat side airbag assembly LH (Rear side squib LH) Center airbag sensor assembly |
| B1858/63 | When one of the following conditions is met: The center airbag sensor receives a short circuit to B+ signal in the rear side squib LH circuit for 0.5 seconds. A rear side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Rear seat side airbag assembly LH (Rear side 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 SIDE AIRBAG LH (REAR SIDE SQUIB LH) |
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect the connector from the rear seat side airbag LH.
Connect the red wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the rear seat side airbag LH (rear side 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 B1855, B1856, B1857 or B1858 is not output.
- HINT:
- Codes other than DTC B1855, B1856, B1857 and B1858 may be output at this time, but they are not related to this check.
| Result | Proceed to |
| OK (for LHD) | A |
| OK (for RHD) | B |
| NG | C |
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| A | ||
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| 2.CHECK FLOOR WIRE (REAR SIDE SQUIB LH CIRCUIT) |
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.
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 Kz5-1 (SRL+) - Body ground Ignition switch ON Below 1 V Kz5-2 (SRL-) - 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 Kz5-1 (SRL+) - Kz5-2 (SRL-) 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 Kz5-1 (SRL+) - Kz5-2 (SRL-) Always 1 MΩ or higher Kz5-1 (SRL+) - Body ground Always 1 MΩ or higher Kz5-2 (SRL-) - Body ground Always 1 MΩ or higher
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| OK | |
| 3.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the rear seat side airbag 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 B1855, B1856, B1857 or B1858 is not output.
- HINT:
- Codes other than DTC B1855, B1856, B1857 and B1858 may be output at this time, but they are not related to this check.
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| OK | ||
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