CHECK CONNECTION OF CONNECTORS
CHECK FRONT AIRBAG SENSOR RH CIRCUIT
CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - ENGINE ROOM MAIN WIRE)
DTC B1612/83 Lost Communication with Front Airbag Sensor RH |
DTC B1613/83 Front Airbag Sensor RH Initialization Incomplete |
DESCRIPTION
The front airbag sensor RH circuit consists of the center airbag sensor and front airbag sensor RH.The front airbag sensor RH detects impacts to the vehicle and sends signals to the center airbag sensor to determine if the airbag should be deployed.
DTC B1612/83 or B1613/83 is stored when a malfunction is detected in the front airbag sensor RH circuit.
| DTC Code | DTC Detection Condition | Trouble Area |
| B1612/83 | One of the following conditions is met:
|
|
| B1613/83 | One of the following conditions is met:
|
|
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).
| 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 RH.
- OK:
- The connectors are properly connected.
|
| ||||
| OK | |
| 2.CHECK CONNECTORS |
Disconnect the connectors from the center airbag sensor and front airbag sensor RH.
Check that the connectors (on the center airbag sensor side and front airbag sensor RH side) are not damaged.
- OK:
- The connectors are not deformed or damaged.
Text in Illustration *1 Front Airbag Sensor RH *2 Center Airbag Sensor
 |
|
| ||||
| OK | |
| 3.CHECK FRONT AIRBAG SENSOR RH CIRCUIT |
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Text in Illustration *1 Front Airbag Sensor RH *2 Center Airbag Sensor *3 Connector E *4 Connector B *5 Service Wire - - *a Front view of wire harness connector
(to Front Airbag Sensor RH)*b Rear view of wire harness connector
(to Center Airbag Sensor)
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition A20-2 (+SR) - Body ground Ignition switch ON Below 1 V A20-1 (-SR) - 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 29 (+SR) and 27 (-SR) 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 A20-2 (+SR) - A20-1 (-SR) 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 A20-2 (+SR) - A20-1 (-SR) Always 1 MΩ or higher A20-2 (+SR) - Body ground Always 1 MΩ or higher A20-1 (-SR) - Body ground Always 1 MΩ or higher
|
| ||||
| OK | |
| 4.CHECK FRONT AIRBAG SENSOR RH |
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 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).
Result Result Proceed to DTC B1612, B1613, B1617 and B1618 are not output A DTC B1617 or B1618 is output B DTC B1612 or B1613 is 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.
Text in Illustration *1 Front Airbag Sensor LH *2 Center Airbag Sensor
|
| ||||
|
| ||||
| C | ||
| ||
| 5.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - ENGINE ROOM MAIN WIRE) |
Disconnect the instrument panel wire connector from the engine room main wire.
Text in Illustration *1 Front Airbag Sensor RH *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.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition GA5-1 (+SR) - Body ground Ignition switch ON Below 1 V GA5-2 (-SR) - 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 29 (+SR) and 27 (-SR) 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 GA5-1 (+SR) - GA5-2 (-SR) 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 GA5-1 (+SR) - GA5-2 (-SR) Always 1 MΩ or higher GA5-1 (+SR) - Body ground Always 1 MΩ or higher GA5-2 (-SR) - Body ground Always 1 MΩ or higher
|
| ||||
| OK | ||
| ||