Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK FRONT SEAT AIRBAG LH (SIDE SQUIB LH)
CHECK FLOOR WIRE (SIDE SQUIB LH CIRCUIT)
DTC B1825/56 Short in Side Squib LH Circuit
DTC B1826/56 Open in Side Squib LH Circuit
DTC B1827/56 Short to GND in Side Squib LH Circuit
DTC B1828/56 Short to B+ in Side Squib LH Circuit
DESCRIPTION
The side squib LH circuit consists of the center airbag sensor and the front seat 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 side squib LH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1825/56 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the side squib LH circuit during the primary check. A side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat airbag assembly LH (Side squib LH) Center airbag sensor assembly |
| B1826/56 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the side squib LH circuit for 2 seconds. A side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat airbag assembly LH (Side squib LH) Center airbag sensor assembly |
| B1827/56 | When one of the following conditions is met: The center airbag sensor receives a short circuit to ground signal in the side squib LH circuit for 0.5 seconds. A side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat airbag assembly LH (Side squib LH) Center airbag sensor assembly |
| B1828/56 | When one of the following conditions is met: The center airbag sensor receives a short circuit to B+ signal in the side squib LH circuit for 0.5 seconds. A side squib LH malfunction. A center airbag sensor malfunction. | Floor wire Front seat airbag assembly LH (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 FRONT SEAT AIRBAG LH (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 front seat airbag LH.
Connect the red wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the front seat airbag LH (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 B1825, B1826, B1827 or B1828 is not output.
- HINT:
- Codes other than DTC B1825, B1826, B1827 and B1828 may be output at this time, but they are not related to this check.
| Result | Proceed to |
| OK (for Manual Seat) | A |
| OK (for Power Seat) | B |
| NG | C |
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| A | ||
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| 2.CHECK FLOOR WIRE (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 Kz4-1 (SFL+) - Body ground Ignition switch ON Below 1 V Kz4-2 (SFL-) - 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 Kz4-1 (SFL+) - Kz4-2 (SFL-) 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 Kz4-1 (SFL+) - Kz4-2 (SFL-) Always 1 MΩ or higher Kz4-1 (SFL+) - Body ground Always 1 MΩ or higher Kz4-2 (SFL-) - Body ground Always 1 MΩ or higher
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| OK | |
| 3.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the front seat 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 B1825, B1826, B1827 or B1828 is not output.
- HINT:
- Codes other than DTC B1825, B1826, B1827 and B1828 may be output at this time, but they are not related to this check.
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| OK | ||
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