CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG (DRIVER SIDE KNEE SQUIB)
CHECK INSTRUMENT PANEL WIRE (LOWER NO. 1 INSTRUMENT PANEL AIRBAG - CENTER AIRBAG SENSOR)
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 squib circuit consists of the center airbag sensor and lower No. 1 instrument panel 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 squib circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1860/64 | One of the following conditions is met:
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| B1861/64 | One of the following conditions is met:
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| B1862/64 | One of the following conditions is met:
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| B1863/64 | One of the following conditions is met:
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WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (LandCruiser RM000003YMD00TX.html).
- When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).
- HINT:
- To perform the simulation method, enter check mode (signal check) with the intelligent tester (LandCruiser RM000000XFF0H0X.html), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (LandCruiser RM000000XFD0N3X.html).
| 1.CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG (DRIVER SIDE KNEE SQUIB) |
Turn the ignition switch off.
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Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect the connector from the lower No. 1 instrument panel airbag.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
- CAUTION:
- Never connect the tester to the lower No. 1 instrument panel airbag (driver side knee squib) for measurement, as this may lead to a serious injury due to airbag deployment.
- NOTICE:
- Do not forcibly insert SST into the terminals of the connector when connecting SST.
- Insert SST straight into the terminals of the connector.
- 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 (LandCruiser RM000000XFE0NGX.html).
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs (LandCruiser RM000000XFE0NGX.html).
- 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.
Text in Illustration *1 Driver Side Knee Squib *2 Center Airbag Sensor *3 Connector C *4 SST *a Front view of wire harness connector
(to Driver Side Knee Squib)
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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 lower No. 1 instrument panel airbag side) is not damaged.
- OK:
- The lock button is not disengaged, and the claw of the lock is not deformed or damaged.
Text in Illustration *1 Driver Side Knee Squib *2 Center Airbag Sensor
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| OK | |
| 3.CHECK INSTRUMENT PANEL WIRE (LOWER NO. 1 INSTRUMENT PANEL AIRBAG - CENTER AIRBAG SENSOR) |
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 G32-1 (DK+) - Body ground Ignition switch ON Below 1 V G32-2 (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 G32-1 (DK+) - G32-2 (DK-) Always Below 1 Ω
Release the activation prevention mechanism built into connector B (LandCruiser RM000000XFD0N3X.html).
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition G32-1 (DK+) - G32-2 (DK-) Always 1 MΩ or higher G32-1 (DK+) - Body ground Always 1 MΩ or higher G32-2 (DK-) - Body ground Always 1 MΩ or higher
| *1 | Driver Side Knee Squib |
| *2 | Instrument Panel Wire |
| *3 | Center Airbag Sensor |
| *4 | Connector C |
| *a | Front view of wire harness connector (to Driver Side Knee Squib) |
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| OK | |
| 4.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the lower No. 1 instrument panel airbag and center airbag sensor.
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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 (LandCruiser RM000000XFE0NGX.html).
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs (LandCruiser RM000000XFE0NGX.html).
- 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.
Text in Illustration *1 Driver Side Knee Squib *2 Center Airbag Sensor
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| OK | ||
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