Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUPPLEMENTAL RESTRAINT SYSTEMS
CHECK CONNECTION OF CONNECTORS
CHECK FRONT AIRBAG SENSOR LH CIRCUIT
CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - ENGINE ROOM MAIN WIRE)
DTC B1617/84 Lost Communication with Front Airbag Sensor LH
DTC B1618/84 Front Airbag Sensor LH Initialization Incomplete
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 B1617/84 or B1618/84 is stored when a malfunction is detected in the front airbag sensor LH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1617/84 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds. A front airbag sensor LH malfunction. A center airbag sensor malfunction. | Instrument panel wire Engine room main wire Front airbag sensor LH Center airbag sensor assembly |
| B1618/84 | When one of the following conditions is met: The center airbag sensor receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds. A front airbag sensor LH malfunction. A center airbag sensor malfunction. | Instrument panel wire Engine room main wire Front airbag sensor LH Center airbag sensor assembly |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
| 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 the 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.
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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.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition A7-2 (+SL) - Body ground Ignition switch ON Below 1 V A7-1 (-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 A7-2 (+SL) - A7-1 (-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 A7-2 (+SL) - A7-1 (-SL) Always 1 MΩ or higher A7-2 (+SL) - Body ground Always 1 MΩ or higher A7-1 (-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.
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 the memory ().
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs ().
| Result | Proceed to |
| DTC B1617 or B1618 is output | A |
| DTC B1612 or B1613 is output | B |
| DTC B1612, B1613, B1617 and B1618 are not output | C |
- HINT:
- Codes other than DTC B1612, B1613, B1617 and B1618 may be output at this time, but they are not related to this check.
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| C | ||
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| 5.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - ENGINE ROOM MAIN WIRE) |
Disconnect the instrument panel wire connector from the engine room main wire.
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 AE1-2 (+SL) - Body ground Ignition switch ON Below 1 V AE1-1 (-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 AE1-2 (+SL) - AE1-1 (-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 AE1-2 (+SL) - AE1-1 (-SL) Always 1 MΩ or higher AE1-2 (+SL) - Body ground Always 1 MΩ or higher AE1-1 (-SL) - Body ground Always 1 MΩ or higher
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| OK | ||
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