Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK CURTAIN SHIELD AIRBAG RH (CURTAIN SHIELD SQUIB RH 2ND STEP)
CHECK NO. 2 FLOOR WIRE (CURTAIN SHIELD AIRBAG RH 2ND STEP CIRCUIT)
DTC B1840/59 Short in Curtain Shield Squib RH 2nd Step Circuit
DTC B1841/59 Open in Curtain Shield Squib RH 2nd Step Circuit
DTC B1842/59 Short to GND in Curtain Shield Squib RH 2nd Step Circuit
DTC B1843/59 Short to B+ in Curtain Shield Squib RH 2nd Step Circuit
DESCRIPTION
The curtain shield squib RH 2nd step circuit consists of the center airbag sensor and the curtain shield airbag RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the curtain shield squib RH 2nd step circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1840/59 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the curtain shield squib RH 2nd step circuit during the primary check. A curtain shield squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Curtain shield airbag assembly RH (Curtain shield squib RH 2nd step) Center airbag sensor assembly |
| B1841/59 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the curtain shield squib RH 2nd step circuit for 2 seconds. A curtain shield squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Curtain shield airbag assembly RH (Curtain shield squib RH 2nd step) Center airbag sensor assembly |
| B1842/59 | When one of the following conditions is met: The center airbag sensor receives a short circuit to ground signal in the curtain shield squib RH 2nd step circuit for 0.5 seconds. A curtain shield squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Curtain shield airbag assembly RH (Curtain shield squib RH 2nd step) Center airbag sensor assembly |
| B1843/59 | When one of the following conditions is met: The center airbag sensor receives a short circuit to B+ signal in the curtain shield squib RH 2nd step circuit for 0.5 seconds. A curtain shield squib RH malfunction. A center airbag sensor malfunction. | No. 2 floor wire Curtain shield airbag assembly RH (Curtain shield squib RH 2nd step) 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 CURTAIN SHIELD AIRBAG RH (CURTAIN SHIELD SQUIB RH 2ND STEP) |
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 curtain shield squib RH 2nd step.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the curtain shield airbag RH (curtain shield squib RH 2nd step) 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 B1840, B1841, B1842 or B1843 is not output.
- HINT:
- Codes other than DTC B1840, B1841, B1842 and B1843 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 No. 2 floor wire connector (on the curtain shield squib RH 2nd step 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 NO. 2 FLOOR WIRE (CURTAIN SHIELD AIRBAG RH 2ND STEP 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 L20-1 (CR2+) - Body ground Ignition switch ON Below 1 V L20-2 (CR2-) - 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 L20-1 (CR2+) - L20-2 (CR2-) 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 L20-1 (CR2+) - L20-2 (CR2-) Always 1 MΩ or higher L20-1 (CR2+) - Body ground Always 1 MΩ or higher L20-2 (CR2-) - Body ground Always 1 MΩ or higher
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| OK | |
| 4.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the curtain shield squib RH 2nd step 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 B1840, B1841, B1842 or B1843 is not output.
- HINT:
- Codes other than DTC B1840, B1841, B1842 and B1843 may be output at this time, but they are not related to this check.
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| OK | ||
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