CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - AIRBAG CUTOFF SWITCH CYLINDER)
INSPECT AIRBAG CUTOFF SWITCH CYLINDER
DTC B1651/33 Manual Cut off Switch Trouble |
DESCRIPTION
- HINT:
- "Manual cut off switch" refers to the airbag cutoff switch cylinder.
The instrument panel passenger airbag can be optionally deactivated via this circuit by turning the airbag cutoff switch cylinder to the "OFF" position.
If the instrument panel passenger airbag is deactivated, the airbag cutoff indicator comes on to inform the passengers.
DTC B1651/33 is stored when a malfunction is detected in the airbag cutoff switch cylinder circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1651/33 | 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:
- The 19-11 (MSW+) and 19-12 (MSW-) terminals in this circuit have an activation prevention mechanism. This mechanism can be used to check for an open circuit in the wire harness. In case of other checks (check for short, short to ground or short to B+), it is necessary to release this mechanism.
| 1.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - AIRBAG CUTOFF SWITCH CYLINDER) |
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 connectors from the center airbag sensor and airbag cut off switch cylinder.
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 G73-2 (PMC+) - Body ground Ignition switch ON Below 1 V G73-1 (PMC-) - 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 G73-2 (PMC+) - G73-1 (PMC-) 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 G73-2 (PMC+) - G73-1 (PMC-) Always 1 MΩ or higher G73-2 (PMC+) - Body ground Always 1 MΩ or higher G73-1 (PMC-) - Body ground Always 1 MΩ or higher
| *1 | Airbag Cutoff Switch Cylinder |
| *2 | Center Airbag Sensor |
| *3 | Front view of wire harness connector (to Airbag Cutoff Switch Cylinder) |
| *4 | Connector C |
| *5 | Rear view of wire harness connector (to Center Airbag Sensor) |
| *6 | Connector B |
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| OK | |
| 2.INSPECT AIRBAG CUTOFF SWITCH CYLINDER |
Remove the airbag cutoff switch cylinder (LandCruiser RM000003YQW00HX.html).
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Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition 2 (PMC+) - 1 (PMC-) Cutoff switch in "ON" position (Front passenger side airbag active) 360 to 440 Ω 2 (PMC+) - 1 (PMC-) Cutoff switch in "OFF" position (Front passenger side airbag not active) 90 to 110 Ω
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| OK | |
| 3.CHECK CENTER AIRBAG SENSOR |
Connect the connectors to the center airbag sensor and airbag cutoff switch cylinder.
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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 stored in memory (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 B1651 is not output.
- HINT:
- Codes other than DTC B1651 may be output at this time, but they are not related to this check.
Text in Illustration *1 Airbag Cutoff Switch Cylinder *2 Center Airbag Sensor
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| OK | ||
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