CHECK CONNECTION OF CONNECTORS
CHECK FRONT AIRBAG SENSOR LH CIRCUIT
DTC B1615/14 Front Airbag Sensor LH Malfunction |
DESCRIPTION
The front airbag sensor LH circuit consists of the center airbag sensor and front airbag sensor LH.The front airbag sensor LH detects impacts to the vehicle and sends signals to the center airbag sensor to determine if the airbag should be deployed.
DTC B1615/14 is stored when a malfunction is detected in the front airbag sensor LH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1615/14 | 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 (HILUX_TGN26 RM000004QR1003X.html).
- When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (HILUX_TGN26 RM000004QR3003X.html).
| 1.CHECK CONNECTION OF CONNECTORS |
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check that the connectors are properly connected to the center airbag sensor and front airbag sensor LH.
- OK:
- The connectors are properly connected.
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| OK | |
| 2.CHECK CONNECTORS |
Disconnect the connectors from the center airbag sensor and front airbag sensor LH.
Check that the connectors (on the center airbag sensor side and front airbag sensor LH side) are not damaged.
- OK:
- The connectors are not deformed or damaged.
Text in Illustration *1 Front Airbag Sensor LH *2 Center Airbag Sensor
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| OK | |
| 3.CHECK FRONT AIRBAG SENSOR LH CIRCUIT |
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Text in Illustration *1 Front Airbag Sensor LH *2 Center Airbag Sensor *3 Connector E *4 Connector B *5 Service Wire - - *a Front view of wire harness connector
(to Front Airbag Sensor LH)*b Rear view of wire harness connector
(to Center Airbag Sensor)
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition A31-2 (+SL) - Body ground Ignition switch ON Below 1 V A31-1 (-SL) - 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.
Using a service wire, connect terminals 30 (+SL) and 28 (-SL) of connector B.
- NOTICE:
- Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A31-2 (+SL) - A31-1 (-SL) 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 A31-2 (+SL) - A31-1 (-SL) Always 1 MΩ or higher A31-2 (+SL) - Body ground Always 1 MΩ or higher A31-1 (-SL) - Body ground Always 1 MΩ or higher
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| OK | |
| 4.CHECK FRONT AIRBAG SENSOR LH |
Connect the connectors to the center airbag sensor.
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Interchange the front airbag sensor LH with RH and connect the connectors to them.
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 (HILUX_TGN26 RM000000XFE0E5X.html).
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs (HILUX_TGN26 RM000000XFE0E5X.html).
Result Result Proceed to DTC B1610/13 and B1615/14 are not output A DTC B1610/13 is output B DTC B1615/14 is output C - HINT:
- Codes other than DTC B1610/13 and B1615/14 may be output at this time, but they are not related to this check.
Text in Illustration *1 Front Airbag Sensor RH *2 Center Airbag Sensor
Return the front airbag sensor RH and LH to their original positions and connect the connectors to them.
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| C | ||
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| 5.CHECK INSTRUMENT PANEL WIRE |
Disconnect the instrument panel wire connector from the engine room main wire.
Text in Illustration *1 Front Airbag Sensor LH *2 Center Airbag Sensor *3 Engine Room Main Wire *4 Instrument Panel Wire *5 Connector C *6 Connector B *7 Service Wire - - *a Front view of wire harness connector
(to Engine Room Main Wire)*b Rear view of wire harness connector
(to Center Airbag Sensor)
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition AG3-3 (+SL) - Body ground Ignition switch ON Below 1 V AG3-4 (-SL) - 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.
Using a service wire, connect terminals 30 (+SL) and 28 (-SL) of connector B.
- NOTICE:
- Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition AG3-3 (+SL) - AG3-4 (-SL) 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 AG3-3 (+SL) - AG3-4 (-SL) Always 1 MΩ or higher AG3-3 (+SL) - Body ground Always 1 MΩ or higher AG3-4 (-SL) - Body ground Always 1 MΩ or higher
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| OK | ||
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