AIRBAG SYSTEM(w/o Occupant Classification System), Diagnostic DTC:B1642/81 and B1647/82
| DTC Code | DTC Name |
|---|---|
| B1642/81 | Lost Communication with Side Satellite Sensor Bus RH |
| B1647/82 | Lost Communication with Side Satellite Sensor Bus LH |
DESCRIPTION
The circuit for the side collision sensor LH or RH (to determine deployment of the front seat airbag assembly LH or RH and curtain shield airbag assembly LH or RH) is composed of the airbag sensor assembly, rear airbag sensor LH or RH and door side airbag sensor LH or RH.
The door side airbag sensor LH or RH and rear airbag sensor LH or RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbag should be deployed.
DTC B1642/82 or B1647/82 is stored when a malfunction is detected in the circuit for the side satellite sensor bus LH or RH (to determine deployment of the front seat airbag assembly LH or RH and curtain shield airbag assembly LH or RH).
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
B1642/81 |
Lost Communication with Side Satellite Sensor Bus RH |
One of the following conditions is met:
|
|
B1647/82 |
Lost Communication with Side Satellite Sensor Bus LH |
One of the following conditions is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
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.
When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.
Click hereClick hereClick hereClick hereClick hereClick here
After replacing the airbag sensor assembly, refer to initialization.
Click hereClick hereClick hereClick hereClick hereClick here
PROCEDURE
CHECK DTC
Turn the ignition switch to off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
Result
Proceed to
DTC B1642/81 is output
DTC B1647/82 is output
DTC B1642/81 and B1647/82 are not output
Tip:Codes other than DTC B1642/81 and B1647/82 may be output at this time, but they are not related to this check.
DTC B1647/82 is output CHECK CONNECTION OF CONNECTORSClick here
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 rear 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
CHECK CONNECTORS
Disconnect the connectors from the airbag sensor assembly and rear airbag sensor RH.
-
*1
Rear Airbag Sensor RH
*2
Airbag Sensor Assembly
*3
Floor Wire
Check that the connectors (on the airbag sensor assembly side and rear 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 FLOOR WIRE
CHECK REAR AIRBAG SENSOR RH CIRCUIT
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
*1
Rear Airbag Sensor RH
*2
Airbag Sensor Assembly
*3
Floor Wire
*4
Connector C
*5
Connector B
*6
Service Wire
*a
Front view of wire harness connector
(to Rear Airbag Sensor RH)
*b
Rear view of wire harness connector
(to Airbag Sensor Assembly)
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
M7-4 (BCR+) - Body ground
Ignition switch ON
Below 1 V
M7-3 (BCR-) - 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 8 (BBR+) and 15 (BBR-) 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
M7-4 (BCR+) - M7-3 (BCR-)
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
M7-4 (BCR+) - M7-3 (BCR-)
Always
1 MΩ or higher
M7-4 (BCR+) - Body ground
Always
1 MΩ or higher
M7-3 (BCR-) - Body ground
Always
1 MΩ or higher
Result
Proceed to
OK
NG
NG CHECK FLOOR WIREClick here
CHECK CONNECTION OF CONNECTOR
Check that the connector is properly connected to the door side airbag sensor RH.
Result
Proceed to
The connector is properly connected
The connector is not properly connected
The connector is not properly connected CONNECT CONNECTOR PROPERLY
CHECK CONNECTOR
Disconnect the connector from the door side airbag sensor RH.
-
*1
Door Side Airbag Sensor RH
*2
Rear Airbag Sensor RH
Check that the connector (on the door side airbag sensor RH side) is not damaged.
Result
Proceed to
The connector is not deformed or damaged
The connector is deformed or damaged
The connector is deformed or damaged REPLACE HARNESS AND CONNECTOR
CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
*1
Door Side Airbag Sensor RH
*2
Rear Airbag Sensor RH
*3
Connector E
*4
Connector B
*5
Service Wire
-
-
*a
Front view of wire harness connector
(to Door Side Airbag Sensor RH)
*b
Front view of wire harness connector
(to Rear Airbag Sensor RH)
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
M7-1 (BDR+) - Body ground
Ignition switch ON
Below 1 V
M7-2 (BDR-) - 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 2 (BDR+) and 1 (BDR-) of connector E.
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
M7-1 (BDR+) - M7-2 (BDR-)
Always
Below 1 Ω
Disconnect the service wire from connector E.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
M7-1 (BDR+) - M7-2 (BDR-)
Always
1 MΩ or higher
M7-1 (BDR+) - Body ground
Always
1 MΩ or higher
M7-2 (BDR-) - Body ground
Always
1 MΩ or higher
Result
Proceed to
OK
NG
NG CHECK FLOOR WIREClick here
CHECK REAR AIRBAG SENSOR RH
-
*1
Rear Airbag Sensor LH
*2
Airbag Sensor Assembly
Connect the connectors to the airbag sensor assembly and door side airbag sensor RH.
Interchange the rear 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.
Body Electrical > SRS Airbag > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 90 seconds.
Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
Result
Proceed to
DTC B1647/82 is output
DTC B1642/81 is output
DTC B1642/81 and B1647/82 are not output
Tip:Codes other than DTC B1642/81 and B1647/82 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 rear airbag sensor LH and RH to their original positions and connect the connectors to them.
DTC B1642/81 is output CHECK DOOR SIDE AIRBAG SENSOR RHClick here
-
CHECK FLOOR WIRE
Disconnect the floor wire connector from the front door wire RH.
*1
Door Side Airbag Sensor RH
*2
Rear Airbag Sensor RH
*3
Front Door Wire RH
*4
Floor Wire
*5
Connector C
*6
Connector B
*7
Service Wire
-
-
*a
Front view of wire harness connector
(to Front Door Wire RH)
*b
Front view of wire harness connector
(to Rear Airbag Sensor RH)
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
M7-1 (BDR+) - Body ground
Ignition switch ON
Below 1 V
M7-2 (BDR-) - 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 2 (BDR+) and 1 (BDR-) of connector C.
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
M7-1 (BDR+) - M7-2 (BDR-)
Always
Below 1 Ω
Disconnect the service wire from connector C.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
M7-1 (BDR+) - M7-2 (BDR-)
Always
1 MΩ or higher
M7-1 (BDR+) - Body ground
Always
1 MΩ or higher
M7-2 (BDR-) - Body ground
Always
1 MΩ or higher
Result
Proceed to
OK
NG
NG REPLACE FLOOR WIRE
CHECK DOOR SIDE AIRBAG SENSOR RH
-
*1
Door Side Airbag Sensor LH
*2
Rear Airbag Sensor RH
Interchange the door side 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.
Body Electrical > SRS Airbag > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 90 seconds.
Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
Result
Proceed to
DTC B1647/82 is output
DTC B1642/81 is output
DTC B1642/81 and B1647/82 are not output
Tip:Codes other than DTC B1642/81 and B1647/82 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 door side airbag sensor LH and RH to their original positions and connect the connectors to them.
-
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 rear airbag sensor LH.
Result
Proceed to
The connectors are properly connected
The connectors are not properly connected
The connectors are not properly connected CONNECT CONNECTORS PROPERLY
CHECK CONNECTORS
Disconnect the connectors from the airbag sensor assembly, rear airbag sensor LH and door side airbag sensor LH.
-
*1
Rear Airbag Sensor LH
*2
Airbag Sensor Assembly
*3
No. 2 Floor Wire
Check that the connectors (on the airbag sensor assembly side and rear airbag sensor LH 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 NO. 2 FLOOR WIRE
CHECK REAR AIRBAG SENSOR LH CIRCUIT
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
*1
Rear Airbag Sensor LH
*2
Airbag Sensor Assembly
*3
No. 2 Floor Wire
*4
Connector C
*5
Connector B
*6
Service Wire
*a
Front view of wire harness connector
(to Rear Airbag Sensor LH)
*b
Rear view of wire harness connector
(to Airbag Sensor Assembly)
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
N9-4 (BCL+) - Body ground
Ignition switch ON
Below 1 V
N9-3 (BCL-) - 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 8 (BBL+) and 11 (BBL-) 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
N9-4 (BCL+) - N9-3 (BCL-)
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
N9-4 (BCL+) - N9-3 (BCL-)
Always
1 MΩ or higher
N9-4 (BCL+) - Body ground
Always
1 MΩ or higher
N9-3 (BCL-) - Body ground
Always
1 MΩ or higher
Result
Proceed to
OK
NG
NG REPLACE NO. 2 FLOOR WIRE
CHECK CONNECTION OF CONNECTOR
Check that the connector is properly connected to the door side airbag sensor LH.
Result
Proceed to
The connector is properly connected
The connector is not properly connected
The connector is not properly connected CONNECT CONNECTOR PROPERLY
CHECK CONNECTOR
Disconnect the connector from the door side airbag sensor LH.
-
*1
Door Side Airbag Sensor LH
*2
Rear Airbag Sensor LH
Check that the connector (on the door side airbag sensor LH side) is not damaged.
Result
Proceed to
The connector is not deformed or damaged
The connector is deformed or damaged
The connector is deformed or damaged REPLACE HARNESS AND CONNECTOR
CHECK DOOR SIDE AIRBAG SENSOR LH CIRCUIT
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
*1
Door Side Airbag Sensor LH
*2
Rear Airbag Sensor LH
*3
Connector E
*4
Connector B
*5
Service Wire
-
-
*a
Front view of wire harness connector
(to Door Side Airbag Sensor LH)
*b
Front view of wire harness connector
(to Rear Airbag Sensor LH)
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
N9-1 (BDL+) - Body ground
Ignition switch ON
Below 1 V
N9-2 (BDL-) - 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 2 (BDL+) and 1 (BDL-) of connector E.
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
N9-1 (BDL+) - N9-2 (BDL-)
Always
Below 1 Ω
Disconnect the service wire from connector E.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
N9-1 (BDL+) - N9-2 (BDL-)
Always
1 MΩ or higher
N9-1 (BDL+) - Body ground
Always
1 MΩ or higher
N9-2 (BDL-) - Body ground
Always
1 MΩ or higher
Result
Proceed to
OK
NG
NG CHECK NO. 2 FLOOR WIREClick here
CHECK REAR AIRBAG SENSOR LH
-
*1
Rear Airbag Sensor RH
*2
Airbag Sensor Assembly
Connect the connectors to the airbag sensor assembly and door side airbag sensor LH.
Interchange the rear 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.
Body Electrical > SRS Airbag > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 90 seconds.
Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
Result
Proceed to
DTC B1642/81 is output
DTC B1647/82 is output
DTC B1642/81 and B1647/82 are not output
Tip:Codes other than DTC B1642/81 and B1647/82 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 rear airbag sensor RH and LH to their original positions and connect the connectors to them.
DTC B1647/82 is output CHECK DOOR SIDE AIRBAG SENSOR LHClick here
-
CHECK NO. 2 FLOOR WIRE
Disconnect the No. 2 floor wire connector from the front door wire LH.
*1
Door Side Airbag Sensor LH
*2
Rear Airbag Sensor LH
*3
Front Door Wire LH
*4
No. 2 Floor Wire
*5
Connector C
*6
Connector B
*7
Service Wire
-
-
*a
Front view of wire harness connector
(to Front Door Wire LH)
*b
Front view of wire harness connector
(to Rear Airbag Sensor LH)
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
N9-1 (BDL+) - Body ground
Ignition switch ON
Below 1 V
N9-2 (BDL-) - 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 3 (BDL+) and 1 (BDL-) of connector C.
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
N9-1 (BDL+) - N9-2 (BDL-)
Always
Below 1 Ω
Disconnect the service wire from connector C.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
N9-1 (BDL+) - N9-2 (BDL-)
Always
1 MΩ or higher
N9-1 (BDL+) - Body ground
Always
1 MΩ or higher
N9-2 (BDL-) - Body ground
Always
1 MΩ or higher
Result
Proceed to
OK
NG
NG REPLACE NO. 2 FLOOR WIRE
CHECK DOOR SIDE AIRBAG SENSOR LH
-
*1
Door Side Airbag Sensor RH
*2
Rear Airbag Sensor LH
Interchange the door side 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.
Body Electrical > SRS Airbag > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 90 seconds.
Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
Result
Proceed to
DTC B1642/81 is output
DTC B1647/82 is output
DTC B1642/81 and B1647/82 are not output
Tip:Codes other than DTC B1642/81 and B1647/82 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 door side airbag sensor RH and LH to their original positions and connect the connectors to them.
-