Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK DRIVER SIDE KNEE AIRBAG (DRIVER SIDE KNEE SQUIB)
CHECK INSTRUMENT PANEL WIRE (DRIVER SIDE KNEE AIRBAG CIRCUIT)
DTC B1860/64 Short in Driver Side Knee Airbag Squib Circuit
DTC B1861/64 Open in Driver Side Knee Airbag Squib Circuit
DTC B1862/64 Short to GND in Driver Side Knee Airbag Squib Circuit
DTC B1863/64 Short to B+ in Driver Side Knee Airbag Squib Circuit
DESCRIPTION
The driver side knee airbag squib circuit consists of the center airbag sensor and the driver side knee airbag.
This circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the driver side knee airbag squib circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1860/64 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal 5 times in the driver side knee airbag squib circuit during the primary check. A driver side knee airbag squib malfunction. A center airbag sensor malfunction. |
Instrument panel wire Driver side knee airbag assembly (Driver side knee squib) Center airbag sensor assembly |
| B1861/64 | When one of the following conditions is met: The center airbag sensor receives an open circuit signal in the driver side knee airbag squib circuit for 2 seconds. A driver side knee airbag squib malfunction. A center airbag sensor malfunction. |
Instrument panel wire Driver side knee airbag assembly (Driver side knee squib) Center airbag sensor assembly |
| B1862/64 | When one of the following conditions is met: The airbag sensor center receives a short circuit to ground signal in the knee airbag (Driver side squib) circuit for 0.5 seconds. A driver side knee airbag squib malfunction. A center airbag sensor malfunction. |
Instrument panel wire Driver side knee airbag assembly (Driver side knee squib) Center airbag sensor assembly |
| B1863/64 | When one of the following conditions is met: The airbag sensor center receives a short circuit to B+ signal in the knee airbag (Driver side squib) circuit for 0.5 seconds. A driver side knee airbag squib malfunction. A center airbag sensor malfunction. |
Instrument panel wire Driver side knee airbag assembly (Driver side knee squib) Center airbag sensor assembly |
- HINT:
- Vehicles that are not equipped with knee airbag still contain knee airbag circuits and use substitution parts in replace of the knee airbag. If a malfunction occurs in this knee airbag circuit, DTC B1860/64, B1861/64, B1862/64 or B1863/64 is stored.
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 DRIVER SIDE KNEE AIRBAG (DRIVER SIDE KNEE SQUIB) |
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 driver side knee airbag.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the driver side knee airbag (driver side knee squib) 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 B1860, B1861, B1862 or B1863 is not output.
- HINT:
- Codes other than DTC B1860, B1861, B1862 and B1863 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 instrument panel wire connector (on the driver side knee airbag 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 INSTRUMENT PANEL WIRE (DRIVER SIDE KNEE AIRBAG 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 E24-1 (DK+) - Body ground Ignition switch ON Below 1 V E24-2 (DK-) - 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 E24-1 (DK+) - E24-2 (DK-) 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 E24-1 (DK+) - E24-2 (DK-) Always 1 MΩ or higher E24-1 (DK+) - Body ground Always 1 MΩ or higher E24-2 (DK-) - Body ground Always 1 MΩ or higher
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| OK | |
| 4.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the driver side knee airbag 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 B1860, B1861, B1862 or B1863 is not output.
- HINT:
- Codes other than DTC B1860, B1861, B1862 and B1863 may be output at this time, but they are not related to this check.
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| OK | ||
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