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

DTC Code
Detection Condition
Trouble Area
B1805/52
When one of the following conditions is met:
  1. The center airbag sensor receives a line 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 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
When one of the following conditions is met:
  1. The center airbag sensor 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 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
When one of the following conditions is met:
  1. The center airbag sensor 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 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
When one of the following conditions is met:
  1. The center airbag sensor 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 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


C146249E18


INSPECTION PROCEDURE

NOTICE:
  1. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work (Click here).
  2. When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (Click here).

HINT:
  1. Perform the simulation method by selecting "check mode" (signal check) with 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 various types of roads (Click here).
1.CHECK FRONT PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB)
C158848E01
  1. Turn the ignition switch off.

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

  1. Disconnect the connectors from the front passenger airbag.

  1. Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (orange connector).

    CAUTION:
    Never connect the tester to the front passenger airbag (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 SST.
    2. Insert SST straight into the terminals of the connector.
SST
09843-18061  
  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

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

  1. Clear the DTCs (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 or B1808 is not output.

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


NG
Go to step 2
OK

REPLACE FRONT PASSENGER AIRBAG ASSEMBLY (Click here)  

2.CHECK CONNECTOR
  1. Turn the ignition switch off.

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

  1. Disconnect SST from connector E.

  1. Check that the instrument panel wire connectors (on the front passenger airbag side) are not damaged.

    OK:
    The lock button is not disengaged, or the claw of the lock is not deformed or damaged.


NG
REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK


3.CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT


    C158863E03
  1. Disconnect the connectors from the center airbag sensor.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    Tester Connection
    Switch Condition
    Specified Condition
    I2-1 (P+) - Body ground
    Ignition switch ON
    Below 1 V
    I2-2 (P-) - Body ground
  1. Turn the ignition switch off.

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

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

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    I2-1 (P+) - I2-2 (P-)
    Always
    Below 1 Ω
  1. Release the activation prevention mechanism built into connector B (Click here).

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

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    I2-1 (P+) - I2-2 (P-)
    Always
    1 MΩ or higher
    I2-1 (P+) - Body ground
    I2-2 (P-) - Body ground


NG
Go to step 5
OK


4.CHECK CENTER AIRBAG SENSOR


    C162203E01
  1. Connect the connectors to the front passenger airbag and the center airbag sensor.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

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

  1. Clear the DTCs (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).

    Result 
    Result
    Proceed to
    DTC B1805, B1806, B1807 or B1808 is output (for Column Shift Type)
    A
    DTC B1805, B1806, B1807 or B1808 is output (for Floor Shift Type)
    B
    DTC B1805, B1806, B1807 or B1808 is not output
    C

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


A
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)
C

USE SIMULATION METHOD TO CHECK (Click here)  

5.CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)


    C159500E01
  1. Restore the released activation prevention mechanism of connector B to the original condition.

  1. Disconnect the instrument panel wire connector from the instrument panel wire assembly.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    Tester Connection
    Switch Condition
    Specified Condition
    JI1-1 - Body ground
    Ignition switch ON
    Below 1 V
    JI1-2 - Body ground
  1. Turn the ignition switch off.

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

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

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    JI1-1 - JI1-2
    Always
    Below 1 Ω
  1. Release the activation prevention mechanism built into connector B (Click here).

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

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    JI1-1 - JI1-2
    Always
    1 MΩ or higher
    JI1-1 - Body ground
    JI1-2 - Body ground


NG
REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE INSTRUMENT PANEL WIRE ASSEMBLY