DTC    B1805/52    Short in Front Passenger Side Squib Circuit

DTC    B1806/52    Open in Front Passenger Side Squib Circuit

DTC    B1807/52    Short to GND in Front Passenger Side Squib Circuit

DTC    B1808/52    Short to B+ in Front Passenger Side Squib Circuit

for Preparation Click here


DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor assembly and the front passenger airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the front passenger side squib circuit.

DTC No.
DTC Detection Condition
Trouble Area
B1805/52
  1. The center airbag sensor assembly receives a short circuit signal 5 times in the front passenger side squib circuit during primary check.
  2. Front passenger side squib malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1806/52
  1. The center airbag sensor assembly receives an open circuit signal in the front passenger side squib circuit for 2 seconds.
  2. Front passenger side squib malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1807/52
  1. The center airbag sensor assembly receives a short circuit to ground signal in the front passenger side squib circuit for 0.5 seconds.
  2. Front passenger side squib malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1808/52
  1. The center airbag sensor assembly receives a short circuit to B+ signal in the front passenger side squib circuit for 0.5 seconds.
  2. Front passenger side squib malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Instrument panel wire assembly
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly

WIRING DIAGRAM


C157590E01


INSPECTION PROCEDURE

HINT:
  1. Perform the simulation method by selecting Check Mode (signal check) using the Techstream (Click here).
  2. After selecting Check Mode (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road (Click here).
1.CHECK CONNECTOR


    C165139E01
  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Check that the connectors are properly connected to the front passenger airbag assembly and center airbag sensor assembly. Also check that the connectors that link the instrument panel wire assembly and instrument panel wire are properly connected.

    OK:
    The connectors are properly connected.

    HINT:
    If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.
  1. Disconnect the connectors from the front passenger airbag assembly and center airbag sensor assembly. Also disconnect the instrument panel wire from the instrument panel wire assembly.

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

    OK:
    The terminals are not deformed or damaged.
  1. Check that the instrument panel wire assembly connector (on the front passenger airbag assembly side) is not damaged.

    OK:
    The lock button is not disengaged, or the claw of the lock is not deformed or damaged.
  1. Check that the short springs for the instrument panel wire and instrument panel wire assembly with the activation prevention mechanism are not deformed or damaged.

    OK:
    The short springs are not deformed or damaged.


NG
REPLACE WIRE HARNESS
OK


2.CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)


    C145469E07
  1. Connect the instrument panel wire to the instrument panel wire assembly and center airbag sensor assembly.

  1. Connect SST (resistance 2.1 Ω) to connector E (orange connector).

    CAUTION:
    Never connect the tester to the front passenger airbag assembly (front passenger side squib) for measurement, as this may lead to a serious injury due to airbag deployment.

    NOTICE:
    1. Do not forcibly insert SST into the terminals of the connector when connecting.
    2. Insert SST straight into the terminals of the connector.
SST
09843-18061  
  1. Connect the cable to the negative (-) battery terminal.

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

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the ignition switch off.

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

  1. Check for DTCs (Click here).

    OK:
    DTC B1805, B1806, B1807, B1808, or 52 is not output.

    HINT:
    Codes other than DTC B1805, B1806, B1807, B1808, and 52 may be output at this time, but they are not related to this check.


NG
Go to step 3
OK

REPLACE FRONT PASSENGER AIRBAG ASSEMBLY (Click here)  

3.CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT


    C157577E05
  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Disconnect SST from connector E.

  1. Disconnect the instrument panel wire from the center airbag sensor assembly.

  1. Check for a short to B+ in the circuit.

    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
      U1-2 (P+) - Body ground
      Ignition switch ON
      Below 1 V
      U1-1 (P-) - Body ground
      Ignition switch ON
      Below 1 V
  1. Check for an open in the circuit.

    1. Turn the ignition 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
      U1-2 (P+) - U1-1 (P-)
      Always
      Below 1 Ω
  1. Check for a 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
      U1-2 (P+) - Body ground
      Always
      1 MΩ or higher
      U1-1 (P-) - Body ground
      Always
      1 MΩ or higher
  1. Check for a short in the circuit.

    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
      U1-2 (P+) - U1-1 (P-)
      Always
      1 MΩ or higher


NG
Go to step 5
OK


4.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    C114811E01
  1. Restore the released activation prevention mechanism of connector B to the original condition.

  1. Connect the connectors to the front passenger airbag assembly and the center airbag sensor assembly.

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

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

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the ignition switch off.

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

  1. Check for DTCs (Click here).

    OK:
    DTC B1805, B1806, B1807, B1808, or 52 is not output.

    HINT:
    Codes other than DTC B1805, B1806, B1807, B1808, and 52 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)  

5.CHECK INSTRUMENT PANEL WIRE


    C167921E05
  1. Restore the released activation prevention mechanism of connector B to the original condition.

  1. Check for a short to B+ in the circuit.

    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
      EU1-1 (P+) - Body ground
      Ignition switch ON
      Below 1 V
      EU1-2 (P-) - Body ground
      Ignition switch ON
      Below 1 V
  1. Check for an open in the circuit.

    1. Turn the ignition 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
      EU1-1 (P+) - EU1-2 (P-)
      Always
      Below 1 Ω
  1. Check for a 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
      EU1-1 (P+) - Body ground
      Always
      1 MΩ or higher
      EU1-2 (P-) - Body ground
      Always
      1 MΩ or higher
  1. Check for a short in the circuit.

    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
      EU1-1 (P+) - EU1-2 (P-)
      Always
      1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE
OK


6.CHECK INSTRUMENT PANEL WIRE ASSEMBLY


    C157587E03
  1. Check for a short to B+ in the circuit.

    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
      U1-2 (P+) - Body ground
      Ignition switch ON
      Below 1 V
      U1-1 (P-) - Body ground
      Ignition switch ON
      Below 1 V
  1. Check for an open in the circuit.

    1. Turn the ignition 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
      U1-2 (P+) - U1-1 (P-)
      Always
      Below 1 Ω
  1. Check for a 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
      U1-2 (P+) - Body ground
      Always
      1 MΩ or higher
      U1-1 (P-) - Body ground
      Always
      1 MΩ or higher
  1. Check for a short in the circuit.

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

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

      Standard Resistance:
      Tester Connection
      Condition
      Specified Condition
      U1-2 (P+) - U1-1 (P-)
      Always
      1 MΩ or higher


NG
REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK

USE SIMULATION METHOD TO CHECK (Click here)