DTC B1648/82: Front Passenger Side Satellite Sensor Bus Initialization Incomplete: Procedure

1. Turn the ignition switch off.
2. Turn the ignition switch to ON, and wait for at least 60 seconds.
3. Check the DTCs. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC B1627/82 and B1637/82 are not output.	A
   DTC B1627/82 is output.	B
   DTC B1637/82 is output.	C

B → See step   8 

C → See step   13 

A: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Disconnect the floor wire connectors from the center airbag sensor assembly and the side airbag sensor RH.
4. Check the floor wire connectors and terminals (on the center airbag sensor assembly and the side airbag sensor RH sides) and check that the connectors are properly connected.

   Result

   Result	Proceed to
   No problem.	A
   Connectors or terminals incorrect.	B
   Connectors connected improperly.	C

B → REPLACE FLOOR WIRE 

C → CONNECT CONNECTORS PROPERLY 

A: Go to next step 

Fig 1: Checking Floor Wire (Center Airbag Sensor Assembly - Side Airbag Sensor RH)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check for short to B+ in the circuit.
   1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
   2. Turn the ignition switch to ON.
   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Switch Condition	Specified Condition
      K1-17 (BBP+) - Body ground	Ignition switch ON	Below 1 V
      K1-18 (BBP-) - Body ground	Ignition switch ON	Below 1 V

   4. Turn the ignition switch off.
   5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
2. Check for open in the circuit.
   1. Using a service wire, connect K2-4 (BBR+) and K2-3 (BBR-) of connector C.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting.

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

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      K1-17 (BBP+) - K1-18 (BBP-)	Always	Below 1 Ω

3. Check for short in the circuit.
   1. Disconnect the service wire from connector C.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      K1-17 (BBP+) - K1-18 (BBP-)	Always	1 MΩ or higher

4. Check for short to ground in the circuit.
   1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      K1-17 (BBP+) - Body ground	Always	1 MΩ or higher
      K1-18 (BBP-) - Body ground	Always	1 MΩ or higher

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Disconnect the floor wire connectors from the side airbag sensor RH and the rear airbag sensor RH.
4. Check the floor wire connectors and terminals (on the side airbag sensor RH and the rear airbag sensor RH sides) and check that the connectors are properly connected.

   Result

   Result	Proceed to
   No problem.	A
   Connectors or terminals incorrect.	B
   Connectors connected improperly.	C

B → REPLACE FLOOR WIRE 

C → CONNECT CONNECTORS PROPERLY 

A: Go to next step 

Fig 2: Checking Floor Wire (Side Airbag Sensor RH - Rear Airbag Sensor RH)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check for short to B+ in the circuit.
   1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
   2. Turn the ignition switch to ON.
   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Switch Condition	Specified Condition
      K2-1 (BCR+) - Body ground	Ignition switch ON	Below 1 V
      K2-2 (BCR-) - Body ground	Ignition switch ON	Below 1 V

   4. Turn the ignition switch off.
   5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
2. Check for open in the circuit.
   1. Using a service wire, connect K3-1 (BCR-) and K3-2 (BCR+) of connector C.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting.

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

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      K2-1 (BCR+) - K2-2 (BCR-)	Always	Below 1 Ω

3. Check for short in the circuit.
   1. Disconnect the service wire from connector C.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      K2-1 (BCR+) - K2-2 (BCR-)	Always	1 MΩ or higher

4. Check for short to ground in the circuit.
   1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      K2-1 (BCR+) - Body ground	Always	1 MΩ or higher
      K2-2 (BCR-) - Body ground	Always	1 MΩ or higher

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Connect the connector to the center airbag sensor assembly.
2. Interchange the side airbag sensor RH with the side airbag sensor LH and connect the connectors to them.
   Fig 3: Checking Side Airbag Sensor LH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
4. Turn the ignition switch to ON, and wait for at least 60 seconds.
5. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
6. Turn the ignition switch off.
7. Turn the ignition switch to ON, and wait for at least 60 seconds.
8. Check for DTCs. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC B1648/82 is output.	A
   DTC B1643/81 is output.	B
   DTC B1643/81 or B1648/82 is not output.	C

   HINT: 

   DTCs other than DTC B1643/81 and B1648/82 may be output at this time, but they are not related to this check.

B → See step   9 

C → See step   12 

A: Go to next step 

1. Connect the connector to the side airbag sensor RH.
2. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors to them.
   Fig 4: Checking Rear Airbag Sensor RH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
4. Turn the ignition switch to ON, and wait for at least 60 seconds.
5. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
6. Turn the ignition switch off.
7. Turn the ignition switch to ON, and wait for at least 60 seconds.
8. Check for DTCs. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC B1648/82 or B1643/81 is not output.	A
   DTC B1648/82 is output.	B
   DTC B1643/81 is output.	C

   HINT: 

   DTCs other than DTC B1643/81 and B1648/82 may be output at this time, but they are not related to this check.

B → See step   10 

C → See step   11 

A → See step   12