CHECK FRONT SEAT OUTER BELT FOR DRIVER SIDE (DRIVER SIDE FRONT PRETENSIONER SQUIB)
CHECK NO. 2 FLOOR WIRE (for LHD), FLOOR WIRE (for RHD)
DTC B1900/73 Short in Front Driver Side Pretensioner Squib Circuit |
DTC B1901/73 Open in Front Driver Side Pretensioner Squib Circuit |
DTC B1902/73 Short to GND in Front Driver Side Pretensioner Squib Circuit |
DTC B1903/73 Short to B+ in Front Driver Side Pretensioner Squib Circuit |
DESCRIPTION
The driver side front pretensioner squib circuit consists of the center airbag sensor and driver side front seat outer belt. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the driver side front pretensioner squib circuit.| DTC No. | DTC Detection Condition | Trouble Area |
| B1900/73 | When one of following conditions is met:
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| B1901/73 | When one of following conditions is met:
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| B1902/73 | When one of following conditions is met:
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| B1903/73 | When one of following conditions is met:
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WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK FRONT SEAT OUTER BELT FOR DRIVER SIDE (DRIVER SIDE FRONT PRETENSIONER SQUIB) |
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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 front seat outer belt.
Connect the white wire side of SST (resistance 2.1 Ω) to the No. 2 floor wire (for LHD) or floor wire (for RHD) connector C.
- SST
- 09843-18060
- CAUTION:
- Never connect a tester to the driver side front pretensioner 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.
- Insert SST straight into the terminals of the connector.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch ON, and wait for at least 60 seconds.
Clear the DTCs (Toyota Fortuner RM000000YVY008X.html).
Turn the ignition switch OFF.
Turn the ignition switch ON, and wait for at least 60 seconds.
Check for DTCs (Toyota Fortuner RM000000YVY008X.html).
- OK:
- DTC B1900, B1901, B1902, B1903 or 73 is not output.
- HINT:
- DTCs other than DTC B1900, B1901, B1902, B1903 or 73 may be output at this time, but they are not related to this check.
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| NG | |
| 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 (resistance 2.1 Ω) from the No. 2 floor wire (for LHD) or floor wire (for RHD).
Check that the No. 2 floor wire (for LHD) or floor wire (for RHD) connector (on the driver side front seat outer belt) is not damaged.
- OK:
- The lock button is not disengaged, or the claw of the lock is not deformed or damaged.
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| OK | |
| 3.CHECK NO. 2 FLOOR WIRE (for LHD), FLOOR WIRE (for RHD) |
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Disconnect the connector from the center airbag sensor.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch ON.
Measure the voltage of the wire harness side connector.
- Standard voltage:
- for LHD:
Tester Connection Specified Condition F19-1 - Body ground Below 1 V F19-2 - Body ground Below 1 V - for RHD:
Tester Connection Specified Condition F20-1 - Body ground Below 1 V F20-2 - Body ground 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 of the wire harness side connector.
- Standard resistance:
- for LHD:
Tester Connection Specified Condition F19-1 - F19-2 Below 1 Ω F19-1 - Body ground 1 MΩ or higher F19-2 - Body ground 1 MΩ or higher - for RHD:
Tester Connection Specified Condition F20-1 - F20-2 Below 1 Ω F20-1 - Body ground 1 MΩ or higher F20-2 - Body ground 1 MΩ or higher
Release the activation prevention mechanism built into connector B (Toyota Fortuner RM000000XFD0EGX.html).
Measure the resistance of the wire harness side connector.
- Standard resistance:
- for LHD:
Tester Connection Specified Condition F19-1 - F19-2 1 MΩ or higher - for RHD:
Tester Connection Specified Condition F20-1 - F20-2 1 MΩ or higher
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| OK | ||
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