CHECK CONNECTION OF CONNECTORS
CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH)
CHECK CONNECTION OF CONNECTORS
CHECK REAR AIRBAG SENSOR RH CIRCUIT
DTC B1620/21 Driver Side - Side Airbag Sensor Circuit Malfunction |
DESCRIPTION
The side airbag sensor RH consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.
DTC B1620/21 is recorded when a malfunction is detected in the side airbag sensor RH circuit.
| DTC Code | Detection Condition | Trouble Area |
| B1620/21 | When both conditions below are met:
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WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK CONNECTION OF CONNECTORS |
Turn the ignition switch OFF.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Check that the connectors are properly connected to the center airbag sensor and side airbag sensor RH.
- OK:
- The connectors are properly connected.
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| OK | |
| 2.CHECK CONNECTORS |
Disconnect the connectors from the center airbag sensor and side airbag sensor RH.
Check that the connectors (on the center airbag sensor side and side airbag sensor RH side) are not damaged.
- OK:
- The connectors are not deformed or damaged.
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| OK | |
| 3.CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH) |
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the ignition switch ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition F30-3 (BBR-) - Body ground Ignition switch ON Below 1 V F30-4 (BBR+) - Body ground
Turn the ignition switch OFF.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Using a service wire, connect terminals 8 (BBD+) and 15 (BBD-) of connector B.
- NOTICE:
- Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
Measure the resistance according to the value(s) in the table below.
- Standard Rresistance:
Tester Connection Condition Specified Condition F30-3 (BBR-) - F30-4 (BBR+) Always Below 1 Ω
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition F30-3 (BBR-) - F30-4 (BBR+) Always 1 MΩ or higher F30-3 (BBR-) - Body ground F30-4 (BBR+) - Body ground
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| OK | |
| 4.CHECK SIDE AIRBAG SENSOR RH |
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Interchange the side airbag sensor LH with RH and connect the connectors to them.
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the ignition switch ON, and wait for at least 60 seconds.
Clear the DTCs stored in the memory (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).
Result Result Proceed to DTC B1620 and B1625 are not output A DTC B1620 is output B DTC B1625 is output C - HINT:
- Codes other than DTC B1620 and B1625 may be output at this time, but they are not related to this check.
Turn the ignition switch OFF.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Return the side airbag sensor LH and RH to their original positions and connect the connectors to them.
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| C | |
| 5.CHECK CONNECTION OF CONNECTORS |
Check that the connector is properly connected to the rear airbag sensor RH.
- OK:
- The connector is properly connected.
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| OK | |
| 6.CHECK CONNECTORS |
Disconnect the connectors from the side airbag sensor RH and rear airbag sensor RH.
Check that the connector (on the rear airbag sensor RH side) is not damaged.
- OK:
- The connector is not deformed or damaged.
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| OK | |
| 7.CHECK REAR AIRBAG SENSOR RH CIRCUIT |
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the ignition switch ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition R16-4 (BCR+) - Body ground Ignition switch ON Below 1 V R16-3 (BCR-) - Body ground
Turn the ignition switch OFF.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Using a service wire, connect terminals 1 (BCR+) and 2 (BCR-) of connector B.
- NOTICE:
- Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
Measure the resistance according to the value(s) in the table below.
- Standard Rresistance:
Tester Connection Condition Specified Condition R16-4 (BCR+) - R16-3 (BCR-) Always Below 1 Ω
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition R16-4 (BCR+) - R16-3 (BCR-) Always 1 MΩ or higher R16-4 (BCR+) - Body ground R16-3 (BCR-) - Body ground
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| OK | |
| 8.CHECK FOR DTC |
Connect the connectors to the side airbag sensor RH.
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Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the ignition switch ON, and wait for at least 60 seconds.
Clear the DTCs stored in the memory (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 B1620 is output.
- HINT:
- Codes other than B1620 may be output at this time, but they are not related to this check.
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| OK | |
| 9.CHECK SIDE AIRBAG SENSOR RH |
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Interchange the side airbag sensor LH with RH and connect the connectors to them.
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the ignition switch ON, and wait for at least 60 seconds.
Clear the DTCs stored in the memory (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).
Result Result Proceed to DTC B1620 and B1625 are not output A DTC B1620 is output B DTC B1625 is output C - HINT:
- Codes other than DTC B1620 and B1625 may be output at this time, but they are not related to this check.
Turn the ignition switch OFF.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Return the side airbag sensor LH and RH to their original positions and connect the connectors to them.
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| C | ||
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