DTC B1625/22: Side Airbag Sensor LH Circuit Malfunction: Procedure

1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.

   OK

   The connectors are properly connected.

   HINT: 

   If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

4. Disconnect the connectors from the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.
5. Check that the terminals of the connectors are not damaged.

   OK

   The terminals are not deformed or damaged.

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Using SST, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.
   Fig 1: Identifying Floor Wire (Open) And Airbag Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   Do not forcibly insert SST into the terminals of the connector.

   • SST: 09843-18040 
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L6-4 (BBL+) - L6-3 (BBL-)	Always	Below 1 Ω

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Disconnect SST from connector B.
   Fig 2: Identifying Floor Wire (Short To B+) And Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L6-4 (BBL+) - L6-3 (BBL-)	Always	1 MΩ or higher

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Connect the cable to the negative (-) battery terminal.
   Fig 3: Identifying Floor Wire (Short To B+) And Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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
   L6-4 (BBL+) - Body ground	Ignition switch ON	Below 1 V
   L6-3 (BBL-) - Body ground	Ignition switch ON	Below 1 V

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Turn the ignition switch off.
   Fig 4: Identifying Floor Wire (Short To B+) And Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L6-4 (BBL+) - Body ground	Always	1 MΩ or higher
   L6-3 (BBL-) - Body ground	Always	1 MΩ or higher

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.
   Fig 5: Identifying Floor Wire (Open) And Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   Do not forcibly insert SST into the terminals of the connector.

   • SST: 09843-18040 
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L6-1 (BCL+) - L6-2 (BCL-)	Always	Below 1 Ω

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Disconnect SST from connector C.
   Fig 6: Identifying Floor Wire (Short To B+) And Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L6-1 (BCL+) - L6-2 (BCL-)	Always	1 MΩ or higher

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Connect the cable to the negative (-) battery terminal.
   Fig 7: Identifying Floor Wire (Short To B+) And Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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
   L6-1 (BCL+) - Body ground	Ignition switch ON	Below 1 V
   L6-2 (BCL-) - Body ground	Ignition switch ON	Below 1 V

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Turn the ignition switch off.
   Fig 8: Identifying Floor Wire (Short To B+) And Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L6-1 (BCL+) - Body ground	Always	1 MΩ or higher
   L6-2 (BCL-) - Body ground	Always	1 MΩ or higher

NG → REPLACE FLOOR WIRE 

OK: Go to next step 

1. Connect the connectors to the center airbag sensor assembly and the rear airbag sensor LH.
   Fig 9: Checking Side Airbag Sensor LH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Interchange the side airbag sensor RH with LH and connect the connectors.
3. Connect the cable to the negative (-) battery terminal.
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 B1625/22 is output.	A
   DTC B1620/21 is output.	B
   DTC B1620/21 and B1625/22 are not output.	C

   HINT: 

   Codes other than DTC B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

C → See step   12 

B → See step   13 

A: Go to next step 

1. Turn the ignition switch off.
   Fig 10: Checking Rear Airbag Sensor LH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Return the side airbag sensors RH and LH to their original positions and connect the connectors.
4. Disconnect the connector from the rear airbag sensor LH.
5. Connect the cable to the negative (-) battery terminal.
6. Turn the ignition switch to ON, and wait for at least 60 seconds.
7. Clear the DTCs stored in the memory . Refer to DTC CHECK / CLEAR .
8. Turn the ignition switch off.
9. Turn the ignition switch to ON, and wait for at least 60 seconds.
10. Check for DTCs . Refer to DTC CHECK / CLEAR .

    OK

    DTC B1625/22 is not output.

    HINT: 

    Codes other than DTC B1625/22 may be output at this time, but they are not related to this check.

NG → See step   15 

OK → See step   14