AIRBAG SYSTEM, Diagnostic DTC:B1651/33

DTC Code DTC Name
B1651/33 Manual Cut off Switch Trouble

DESCRIPTION

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

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

If the front passenger airbag, front passenger side knee airbag and front passenger side - side airbag are deactivated, the passenger airbag ON/OFF indicator ("OFF") comes on to inform the passengers.

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

DTC No. DTC Detecting Condition Trouble Area
B1651/33

  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the airbag cut off switch circuit for 2 seconds.

  • Airbag cut off switch malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Airbag cut off switch

  • Center airbag sensor assembly

WIRING DIAGRAM

A0161D2E07

INSPECTION PROCEDURE

Tech Tips

The "B" J47-11 (MSW+) and J47-12 (MSW-) connectors in this circuit have an activation prevention mechanism.

This mechanism can be used to check for an open circuit in the wire harness. In case of other checks (check for short, short to ground or short to B+), this mechanism should be released.

PROCEDURE


  1. CHECK CONNECTORS


    1. Turn the engine 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 and airbag cut off switch.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the center 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.

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  2. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. A01606JE04

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J91-2 (PMC+) - J91-1 (PMC-) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  3. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A0162FEE04

      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
      J91-2 (PMC+) - J91-1 (PMC-) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  4. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. A0162FEE04

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

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      J91-2 (PMC+) - Body ground Engine switch on (IG) Below 1 V
      J91-1 (PMC-) - Body ground Engine switch on (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  5. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A0162FEE04

      Turn the engine switch off.

    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
      J91-2 (PMC+) - Body ground Always 1 MΩ or higher
      J91-1 (PMC-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK AIRBAG CUT OFF SWITCH


    1. A0162GQE04

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

      Standard Resistance
      Tester Connection Manual Cut Off Switch Condition Specified Condition
      J91-2 (PMC+) - J91-1 (PMC-) Cut off switch is in ON position 360 to 440 Ω
      J91-2 (PMC+) - J91-1 (PMC-) Cut off switch is in OFF position 90 to 110 Ω

    NG

    REPLACE AIRBAG CUT OFF SWITCH

    OK

  7. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A0160OFE02

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

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

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

    4. Turn the engine switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the engine switch off.

    7. Turn the engine switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs Click here.

      OK
      DTC B1651/33 is not output.

      Tech Tips

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


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here