AIRBAG SYSTEM(w/o Occupant Classification System), Diagnostic DTC:B1612/83 and B1613/83

DTC Code	DTC Name
B1612/83	Lost Communication with Front Airbag Sensor RH
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 stored when a malfunction is detected in the front airbag sensor RH circuit.


DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1612/83	Lost Communication with Front Airbag Sensor RH	One of the following conditions is met: The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor RH circuit for 2 seconds. A front airbag sensor RH malfunction. A airbag sensor assembly malfunction.	Instrument panel wire Engine room main wire Front airbag sensor RH Airbag sensor assembly
B1613/83	Front Airbag Sensor RH Initialization Incomplete	One of the following conditions is met: The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor RH circuit for 2 seconds. A front airbag sensor RH malfunction. A airbag sensor assembly malfunction.	Instrument panel wire Engine room main wire Front airbag sensor RH Airbag sensor assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note:

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.
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After replacing the airbag sensor assembly, refer to initialization.
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PROCEDURE

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 front airbag sensor RH.

Result


Proceed to
The connectors are properly connected
The connectors are not properly connected

The connectors are not properly connected

CONNECT CONNECTORS PROPERLY

The connectors are properly connected

CHECK CONNECTORS

Disconnect the connectors from the airbag sensor assembly and front airbag sensor RH.

*1	Front Airbag Sensor RH
*2	Airbag Sensor Assembly

Check that the connectors (on the airbag sensor assembly side and front airbag sensor RH side) are not damaged.

Result


Proceed to
The connectors are not deformed or damaged
The connectors are deformed or damaged

The connectors are deformed or damaged

REPLACE HARNESS AND CONNECTOR

The connectors are not deformed or damaged

CHECK FRONT AIRBAG SENSOR RH CIRCUIT

Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

Turn the ignition switch to ON.

*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)

Measure the voltage according to the value(s) in the table below.

Standard Voltage


Tester Connection	Switch Condition	Specified Condition
A49-2 (+SR) - Body ground	Ignition switch ON	Below 1 V
A49-1 (-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.

Note:
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
A49-2 (+SR) - A49-1 (-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
A49-2 (+SR) - A49-1 (-SR)	Always	1 MΩ or higher
A49-2 (+SR) - Body ground	Always	1 MΩ or higher
A49-1 (-SR) - Body ground	Always	1 MΩ or higher

Result


Proceed to
OK
NG

CHECK INSTRUMENT PANEL WIREClick here

CHECK FRONT AIRBAG SENSOR RH

*1	Front Airbag Sensor LH
*2	Airbag Sensor Assembly

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 memory.
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Body Electrical > SRS Airbag > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs.

Click here

Body Electrical > SRS Airbag > Trouble Codes

Result


Proceed to
DTC B1612/83 or B1613/83 is output
DTC B1617/84 or B1618/84 is output
DTC B1612/83, B1613/83, B1617/84 and B1618/84 are not output

Tip:

Codes other than DTC B1612/83, B1613/83, B1617/84 and B1618/84 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 LH and RH to their original positions and connect the connectors to them.

DTC B1612/83 or B1613/83 is output

REPLACE AIRBAG SENSOR ASSEMBLY

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DTC B1617/84 or B1618/84 is output

REPLACE FRONT AIRBAG SENSOR RH

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DTC B1612/83, B1613/83, B1617/84 and B1618/84 are not output

USE SIMULATION METHOD TO CHECK

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CHECK INSTRUMENT PANEL 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.
Turn the ignition switch to ON.

*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)

Measure the voltage according to the value(s) in the table below.

Standard Voltage


Tester Connection	Switch Condition	Specified Condition
AG10-1 (+SR) - Body ground	Ignition switch ON	Below 1 V
AG10-2 (-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.

Note:
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
AG10-1 (+SR) - AG10-2 (-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
AG10-1 (+SR) - AG10-2 (-SR)	Always	1 MΩ or higher
AG10-1 (+SR) - Body ground	Always	1 MΩ or higher
AG10-2 (-SR) - Body ground	Always	1 MΩ or higher

Result


Proceed to
OK
NG

REPLACE ENGINE ROOM MAIN WIRE

REPLACE INSTRUMENT PANEL WIRE