AIRBAG SYSTEM(w/o Curtain Shield Airbag), Diagnostic DTC:B1651/33

DESCRIPTION

The airbag cut-off switch circuit consists of the airbag sensor assembly and airbag cut-off switch.

The front passenger airbag can be optionally deactivated via this circuit by turning the airbag cut-off switch to the OFF position.

If the front passenger airbag is deactivated, the passenger airbag ON/OFF indicator ("OFF") comes on to inform the passengers.

DTC B1651/33 is stored when a malfunction is detected in the airbag cut-off switch circuit.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   CHECK CONNECTORS

   
   

   1. Turn the ignition switch off.

   2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   3. Check that the connectors are properly connected to the airbag sensor assembly and airbag cut-off switch.

      OK
      The connectors are properly connected.

      Tip:

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

   4. Disconnect the connectors from the airbag sensor assembly and airbag cut-off switch.

   5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

   6. Check that the short spring for the instrument panel wire connector with the activation prevention mechanism is not deformed or damaged.

      OK
      The short spring is not deformed or damaged.

   
   
   • OKClick here
   • NG

     REPLACE INSTRUMENT PANEL WIRE

2. Click here

   CHECK INSTRUMENT PANEL WIRE (OPEN)

   
   
   1. 

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

      Table 2. Text in Illustration

      *1	Airbag Cut-off Switch	*2	Airbag Sensor Assembly
      *3	Instrument Panel Wire	*4	Connector B
      *5	Connector C	*6	Service Wire
      *a	Front view of wire harness connector (to Airbag Sensor Assembly)	*b	Front view of wire harness connector (to Airbag Cut-off Switch)

      Standard Resistance
      Tester Connection Condition Specified Condition F20-2 (PMC+) - F20-1 (PMC-) Always Below 1 Ω

   
   
   • OKClick here
   • NG

     REPLACE INSTRUMENT PANEL WIRE

3. Click here

   CHECK INSTRUMENT PANEL WIRE (SHORT)

   
   
   1. 

      Release the activation prevention mechanism built into connector B (Click here).

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

      Standard Resistance
      Tester Connection Condition Specified Condition F20-2 (PMC+) - F20-1 (PMC-) Always 1 MΩ or higher

      Table 3. Text in Illustration

      *1	Airbag Cut-off Switch
      *2	Airbag Sensor Assembly
      *3	Instrument Panel Wire
      *4	Connector C
      *a	Front view of wire harness connector (to Airbag Cut-off Switch)

   3. Restore the released activation prevention mechanism of connector B to the original condition.

   
   
   • OKClick here
   • NG

     REPLACE INSTRUMENT PANEL WIRE

4. Click here

   CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

   
   
   1. 

      Connect the cable to the negative (-) battery terminal.

   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 F20-2 (PMC+) - Body ground Ignition switch ON Below 1 V F20-1 (PMC-) - Body ground Ignition switch ON Below 1 V

      Table 4. Text in Illustration

      *1	Airbag Cut-off Switch
      *2	Airbag Sensor Assembly
      *3	Instrument Panel Wire
      *4	Connector C
      *a	Front view of wire harness connector (to Airbag Cut-off Switch)

   
   
   • OKClick here
   • NG

     REPLACE INSTRUMENT PANEL WIRE

5. Click here

   CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

   
   
   1. 

      Turn the ignition switch off.

   2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F20-2 (PMC+) - Body ground Always 1 MΩ or higher F20-1 (PMC-) - Body ground Always 1 MΩ or higher

      Table 5. Text in Illustration

      *1	Airbag Cut-off Switch
      *2	Airbag Sensor Assembly
      *3	Instrument Panel Wire
      *4	Connector C
      *a	Front view of wire harness connector (to Airbag Cut-off Switch)

   
   
   • OKClick here
   • NG

     REPLACE INSTRUMENT PANEL WIRE

6. Click here

   CHECK AIRBAG CUT-OFF SWITCH

   
   
   1. 

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition 2 (PMC+) - 1 (PMC-) Cut-off switch in ON 360 to 440 Ω 2 (PMC+) - 1 (PMC-) Cut-off switch in OFF 90 to 110 Ω

      Table 6. Text in Illustration

      *a	Component without harness connected (Airbag Cut-off Switch)

   
   
   • OKClick here
   • NG

     REPLACE AIRBAG CUT-OFF SWITCH (Click here)

7. Click here

   CHECK AIRBAG SENSOR ASSEMBLY

   
   

   1. Restore the released activation prevention mechanism of connector B to the original condition.

   2. Connect the connectors to the airbag sensor assembly and airbag cut-off switch.

   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 (Click here).

   6. Turn the ignition switch off.

   7. Turn the ignition switch to ON, and wait for at least 60 seconds.

   8. Check for DTCs (Click here).

      OK
      DTC B1651/33 is not output.

      Tip:

      Codes other than DTC B1651/33 may be output at this time, but they are not related to this check.

   
   
   • OK

     USE SIMULATION METHOD TO CHECK (Click here)

   • NG

     REPLACE AIRBAG SENSOR ASSEMBLY (Click here)