DTC Code | DTC Name |
---|---|
B1642/81 | Lost Communication with Side Satellite Sensor Bus RH |
B1643/81 | Side Satellite Sensor Bus RH Initialization Incomplete |
B1647/82 | Lost Communication with Side Satellite Sensor Bus LH |
B1648/82 | Side Satellite Sensor Bus LH Initialization Incomplete |
DESCRIPTION
The circuit for the side collision sensor LH or RH is composed of the airbag ECU 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 ECU assembly to determine if the airbag should be deployed.
DTC B1642/81, B1643/81, B1647/82 or B1648/82 is stored when a malfunction is detected in the circuit for the side satellite sensor bus LH or RH.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Test Mode / Check Mode |
---|---|---|---|---|---|
B1642/81 | Lost Communication with Side Satellite Sensor Bus RH | One of the following conditions is met:
|
|
Comes on | Not applicable |
B1643/81 | Side Satellite Sensor Bus RH Initialization Incomplete | One of the following conditions is met:
|
|
Comes on | Not applicable |
B1647/82 | Lost Communication with Side Satellite Sensor Bus LH | One of the following conditions is met:
|
|
Comes on | Not applicable |
B1648/82 | Side Satellite Sensor Bus LH Initialization Incomplete | One of the following conditions is met:
|
|
Comes on | Not applicable |
WIRING DIAGRAM
*a | Airbag ECU Assembly |
*b | Rear Airbag Sensor RH |
*c | Door Side Airbag Sensor RH |
*a | Airbag ECU Assembly |
*b | Rear Airbag Sensor LH |
*c | Door Side Airbag Sensor LH |
CAUTION / NOTICE / HINT
Note
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.
PROCEDURE
CHECK DTC
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
Result | ||||
---|---|---|---|---|
|
Tech Tips
Codes other than DTC B1642/81, B1643/81, B1647/82 and B1648/82 may be output at this time, but they are not related to this check.
DTC B1647/82 or B1648/82 is output |
CHECK CONNECTION OF CONNECTORS Click here |
DTC B1642/81, B1643/81, B1647/82 and B1648/82 are not output |
USE SIMULATION METHOD TO CHECK Click here |
DTC B1642/81 or B1643/81 is output |
CHECK CONNECTION OF CONNECTORS
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Check that the connectors are properly connected to the airbag ECU assembly and rear airbag sensor RH.
Result | |||
---|---|---|---|
|
The connectors are not properly connected |
CONNECT CONNECTORS PROPERLY |
The connectors are properly connected |
CHECK CONNECTORS
Disconnect the connectors from the airbag ECU assembly and rear airbag sensor RH.
*1 | Rear Airbag Sensor RH |
*2 | Airbag ECU Assembly |
*3 | Floor Wire |
Check that the connectors (on the airbag ECU assembly side and rear airbag sensor RH side) are not damaged.
Result | |||
---|---|---|---|
|
The connectors are deformed or damaged |
REPLACE FLOOR WIRE |
The connectors are not deformed or damaged |
CHECK FLOOR WIRE
*1 | Rear Airbag Sensor RH |
*2 | Airbag ECU Assembly |
*3 | Floor Wire |
*4 | Service Wire |
*a | Front view of wire harness connector (to Rear Airbag Sensor RH) |
*b | Front view of wire harness connector (to Airbag ECU Assembly) |
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 25 (BBR+) and 26 (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 | ||||||
---|---|---|---|---|---|---|
|
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPLACE FLOOR WIRE |
OK |
CHECK REAR AIRBAG SENSOR RH
*1 | Rear Airbag Sensor LH |
*2 | Airbag ECU Assembly |
Connect the connectors to the airbag ECU assembly.
Interchange the side rear sensor RH with LH and connect the connectors to them.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in memory.
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
Result | ||||
---|---|---|---|---|
|
Tech Tips
Codes other than DTC B1642/81, B1643/81, B1647/82 and B1648/82 may be output at this time, but they are not related to this check.
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary 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 B1647/82 or B1648/82 is output |
REPLACE REAR AIRBAG SENSOR RH Click here |
DTC B1642/81, B1643/81, B1647/82 and B1648/82 are not output |
USE SIMULATION METHOD TO CHECK Click here |
DTC B1642/81 or B1643/81 is output |
CHECK CONNECTION OF CONNECTOR
Check that the connector is properly connected to the door side airbag sensor RH.
Result | |||
---|---|---|---|
|
The connector is not properly connected |
CONNECT CONNECTOR PROPERLY |
The connector is properly connected |
CHECK CONNECTOR
Disconnect the connectors from the door side airbag sensor RH and rear airbag sensor RH.
*1 | Door Side Airbag Sensor RH |
*2 | Rear Airbag Sensor RH |
*3 | Front Door Wire RH |
*4 | Floor Wire |
Check that the connector (on the door side airbag sensor RH side) is not damaged.
Result | |||
---|---|---|---|
|
The connector is deformed or damaged |
REPLACE FRONT DOOR WIRE RH |
The connector is not deformed or damaged |
CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT
*1 | Door Side Airbag Sensor RH |
*2 | Rear Airbag Sensor RH |
*3 | Front Door Wire RH |
*4 | Floor Wire |
*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) |
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 1 (BBR+) and 2 (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 | ||||||
---|---|---|---|---|---|---|
|
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
CHECK FLOOR WIRE Click here |
OK |
CHECK DOOR SIDE AIRBAG SENSOR RH
*1 | Door Side Airbag Sensor LH |
*2 | Rear Airbag Sensor RH |
Connect the connector to the 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 (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored.
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
Result | ||||
---|---|---|---|---|
|
Tech Tips
Codes other than DTC B1642/81, B1643/81, B1647/82 and B1648/82 may be output at this time, but they are not related to this check.
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary 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.
DTC B1642/81 or B1643/81 is output |
REPLACE AIRBAG ECU ASSEMBLY Click here |
DTC B1647/82 or B1648/82 is output |
REPLACE DOOR SIDE AIRBAG SENSOR RH Click here |
DTC B1642/81, B1643/81, B1647/82 and B1648/82 are not output |
USE SIMULATION METHOD TO CHECK Click here |
CHECK FLOOR WIRE
*1 | Door Side Airbag Sensor RH |
*2 | Rear Airbag Sensor RH |
*3 | Front Door Wire RH |
*4 | Floor Wire |
*5 | 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) |
Disconnect the floor wire connector from the front door wire RH.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 1 (BBR+) and 2 (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 | ||||||
---|---|---|---|---|---|---|
|
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPLACE FRONT DOOR WIRE RH |
NG |
REPLACE FLOOR WIRE |
CHECK CONNECTION OF CONNECTORS
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Check that the connectors are properly connected to the airbag ECU assembly and rear airbag sensor LH.
Result | |||
---|---|---|---|
|
The connectors are not properly connected |
CONNECT CONNECTORS PROPERLY |
The connectors are properly connected |
CHECK CONNECTORS
Disconnect the connectors from the airbag ECU assembly and rear airbag sensor LH.
*1 | Rear Airbag Sensor LH |
*2 | Airbag ECU Assembly |
*3 | Floor Wire |
Check that the connectors (on the airbag ECU assembly side and rear airbag sensor LH side) are not damaged.
Result | |||
---|---|---|---|
|
The connectors are deformed or damaged |
REPLACE FLOOR WIRE |
The connectors are not deformed or damaged |
CHECK FLOOR WIRE
*1 | Rear Airbag Sensor LH |
*2 | Airbag ECU Assembly |
*3 | Floor Wire |
*4 | Service Wire |
*a | Front view of wire harness connector (to Rear Airbag Sensor LH) |
*b | Front view of wire harness connector (to Airbag ECU Assembly) |
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 32 (BBL+) and 31 (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 | ||||||
---|---|---|---|---|---|---|
|
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPLACE FLOOR WIRE |
OK |
CHECK REAR AIRBAG SENSOR LH
*1 | Rear Airbag Sensor RH |
*2 | Airbag ECU Assembly |
Connect the connectors to the airbag ECU assembly.
Interchange the rear airbag sensor LH with RH and connect the connectors to them.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in memory.
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
Result | ||||
---|---|---|---|---|
|
Tech Tips
Codes other than DTC B1642/81, B1643/81, B1647/82 and B1648/82 may be output at this time, but they are not related to this check.
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary 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 B1642/81 or B1643/81 is output |
REPLACE REAR AIRBAG SENSOR LH Click here |
DTC B1642/81, B1643/81, B1647/82 and B1648/82 are not output |
USE SIMULATION METHOD TO CHECK Click here |
DTC B1647/82 or B1648/82 is output |
CHECK CONNECTION OF CONNECTOR
Check that the connector is properly connected to the door side airbag sensor LH.
Result | |||
---|---|---|---|
|
The connector is not properly connected |
CONNECT CONNECTOR PROPERLY |
The connector is properly connected |
CHECK CONNECTOR
Disconnect the connectors from the door side airbag sensor LH and rear airbag sensor LH.
*1 | Door Side Airbag Sensor LH |
*2 | Rear Airbag Sensor LH |
*3 | Front Door Wire LH |
*4 | Floor Wire |
Check that the connector (on the door side airbag sensor LH side) is not damaged.
Result | |||
---|---|---|---|
|
The connector is deformed or damaged |
REPLACE FRONT DOOR WIRE LH |
The connector is not deformed or damaged |
CHECK DOOR SIDE AIRBAG SENSOR LH CIRCUIT
*1 | Door Side Airbag Sensor LH |
*2 | Rear Airbag Sensor LH |
*3 | Front Door Wire LH |
*4 | Floor Wire |
*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) |
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 1 (BBL+) and 2 (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 | ||||||
---|---|---|---|---|---|---|
|
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
CHECK FLOOR WIRE Click here |
OK |
CHECK DOOR SIDE AIRBAG SENSOR LH
*1 | Door Side Airbag Sensor RH |
*2 | Rear Airbag Sensor LH |
Connect the connector to the 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 (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored.
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
Result | ||||
---|---|---|---|---|
|
Tech Tips
Codes other than DTC B1642/81, B1643/81, B1647/82 and B1648/82 may be output at this time, but they are not related to this check.
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary 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.
DTC B1642/81 or B1643/81 is output |
REPLACE DOOR SIDE AIRBAG SENSOR LH Click here |
DTC B1647/82 or B1648/82 is output |
REPLACE AIRBAG ECU ASSEMBLY Click here |
DTC B1642/81, B1643/81, B1647/82 and B1648/82 are not output |
USE SIMULATION METHOD TO CHECK Click here |
CHECK FLOOR WIRE
*1 | Door Side Airbag Sensor LH |
*2 | Rear Airbag Sensor LH |
*3 | Front Door Wire LH |
*4 | Floor Wire |
*5 | 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) |
Disconnect the floor wire connector from the front door wire LH.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Using a service wire, connect terminals 1 (BBL+) and 2 (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 | ||||||
---|---|---|---|---|---|---|
|
Disconnect the service wire from connector B.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPLACE FRONT DOOR WIRE LH |
NG |
REPLACE FLOOR WIRE |