Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK FRONT SEAT AIRBAG RH (SIDE SQUIB RH)
CHECK NO. 2 FLOOR WIRE (SIDE SQUIB RH CIRCUIT)
DTC B1820/55 Short in Side Squib RH Circuit
DTC B1821/55 Open in Side Squib RH Circuit
DTC B1822/55 Short to GND in Side Squib RH Circuit
DTC B1823/55 Short to B+ in Side Squib RH Circuit
DESCRIPTION
The side squib RH circuit consists of the center airbag sensor and the front seat airbag RH.
This circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the side squib RH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1820/55 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the side squib RH circuit during the primary check. A side squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Front seat airbag assembly RH (Side squib RH) Center airbag sensor assembly |
| B1821/55 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the side squib RH circuit for 2 seconds. A side squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Front seat airbag assembly RH (Side squib RH) Center airbag sensor assembly |
| B1822/55 | When one of the following conditions is met: The center airbag sensor receives a short circuit to ground signal in the side squib RH circuit for 0.5 seconds. A side squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Front seat airbag assembly RH (Side squib RH) Center airbag sensor assembly |
| B1823/55 | When one of the following conditions is met: The center airbag sensor receives a short circuit to B+ signal in the side squib RH circuit for 0.5 seconds. A side squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Front seat airbag assembly RH (Side squib RH) 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 RH (SIDE SQUIB RH) |
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 RH.
Connect the red wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the front seat airbag RH (side squib RH) 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 B1820, B1821, B1822 or B1823 is not output.
- HINT:
- Codes other than DTC B1820, B1821, B1822 and B1823 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 NO. 2 FLOOR WIRE (SIDE SQUIB RH 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 Lz1-1 (SFR+) - Body ground Ignition switch ON Below 1 V Lz1-2 (SFR-) - 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 Lz1-1 (SFR+) - Lz1-2 (SFR-) 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 Lz1-1 (SFR+) - Lz1-2 (SFR-) Always 1 MΩ or higher Lz1-1 (SFR+) - Body ground Always 1 MΩ or higher Lz1-2 (SFR-) - 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 RH 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 B1820, B1821, B1822 or B1823 is not output.
- HINT:
- Codes other than DTC B1820, B1821, B1822 and B1823 may be output at this time, but they are not related to this check.
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| OK | ||
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