CHECK CONNECTION OF CONNECTORS
CHECK FRONT AIRBAG SENSOR RH CIRCUIT
CHECK INSTRUMENT PANEL WIRE (AIRBAG SENSOR ASSEMBLY - 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 airbag sensor assembly and front airbag sensor RH.The front airbag sensor RH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbag should be deployed.
DTC B1612/83 or B1613/83 is recorded when a malfunction is detected in the front airbag sensor RH circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
| B1612/83 B1613/83 | When one of following conditions is met:
|
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK DTC |
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs (YARIS_NCP93 RM000000XFE0EFX.html).
- OK:
- DTC B161A/8A is not output.
|
| ||||
| OK | |
| 2.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 airbag sensor assembly and the front airbag sensor RH.
- OK:
- The connectors are properly connected.
|
| ||||
| OK | |
| 3.CHECK CONNECTORS |
Disconnect the connectors from the airbag sensor assembly and front airbag sensor RH.
Check that the connectors (on the airbag sensor assembly side and front airbag sensor RH side) are not damaged.
- OK:
- The connectors are not deformed or damaged.
|
| ||||
| OK | |
| 4.CHECK FRONT AIRBAG SENSOR RH CIRCUIT |
| *1 | Front Airbag Sensor RH | *2 | Airbag Sensor Assembly |
| *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 Airbag Sensor Assembly) |
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 A56-2 (+SR) - Body ground Ignition switch ON Below 1 V A56-1 (-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 and 27 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 Resistance:
Tester Connection Condition Specified Condition A56-2 (+SR) - A56-1 (-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 A56-2 (+SR) - A56-1 (-SR) Always 1 MΩ or higher A56-2 (+SR) - Body ground Always 1 MΩ or higher A56-1 (-SR) - Body ground Always 1 MΩ or higher
|
| ||||
| OK | |
| 5.CHECK FRONT AIRBAG SENSOR RH |
 |
Connect the connectors to the airbag sensor assembly.
Interchange the front airbag sensor RH with LH 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 (YARIS_NCP93 RM000000XFE0EFX.html).
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs (YARIS_NCP93 RM000000XFE0EFX.html).
Result Result Proceed to DTC B1612/83, B1613/83, B1617/84 and B1618/84 are not output A DTC B1617/84 or B1618/84 is output B DTC B1612/83 or B1613/83 is output C Text in Illustration *1 Front Airbag Sensor LH *2 Airbag Sensor Assembly - HINT:
- DTCs other than B1612, B1613, B1617, B1618, 83 and 84 may be output at this time, but they are not related to this check.
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Return the front airbag sensor RH and front airbag sensor LH to their original positions and connect the connectors to them.
|
| ||||
|
| ||||
| A | ||
| ||
| 6.CHECK INSTRUMENT PANEL WIRE (AIRBAG SENSOR ASSEMBLY - ENGINE ROOM MAIN WIRE) |
| *1 | Front Airbag Sensor RH | *2 | Airbag Sensor Assembly |
| *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 Airbag Sensor Assembly) |
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.
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 AD6-1 (+SR) - Body ground Ignition switch ON Below 1 V AD6-2 (-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 terminal -SR and +SR 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 Resistance:
Tester Connection Condition Specified Condition AD6-1 (+SR) - AD6-2 (-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 AD6-1 (+SR) - AD6-2 (-SR) Always 1 MΩ or higher AD6-1 (+SR) - Body ground Always 1 MΩ or higher AD6-2 (-SR) - Body ground Always 1 MΩ or higher
|
| ||||
| OK | ||
| ||