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 signals 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
When one of following conditions is met:
  1. Center airbag sensor assembly detects line short circuit signal in front passenger side squib circuit 5 times during primary check
  2. Front passenger side squib malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. No. 2 instrument panel wire
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1806/52
When one of following conditions is met:
  1. Center airbag sensor assembly detects open circuit signal in 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. No. 2 instrument panel wire
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1807/52
When one of following conditions is met:
  1. Center airbag sensor assembly detects short circuit to ground signal in 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. No. 2 instrument panel wire
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly
B1808/52
When one of following conditions is met:
  1. Center airbag sensor assembly detects short circuit to B+ signal in 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. No. 2 instrument panel wire
  3. Front passenger airbag assembly (Front passenger side squib)
  4. Center airbag sensor assembly

WIRING DIAGRAM


C146249E53


INSPECTION PROCEDURE

HINT:
  1. Perform the simulation method by selecting Check Mode (signal check) with the intelligent tester (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 street or rough road (Click here).

1.CHECK CONNECTOR

  1. Turn the ignition switch off.

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

  1. Disconnect the connector from the front passenger airbag assembly.

  1. Check the No. 2 instrument panel wire connector and terminals (on the front passenger airbag side) and that the connector is properly connected to the front passenger airbag.
    Result 
    Result
    		Proceed to
    No problem.
    		A
    Connector or terminals incorrect.
    		B
    Connector connected improperly.
    		C



B
REPLACE NO. 2 INSTRUMENT PANEL WIRE

C
CONNECT CONNECTOR PROPERLY
A


2.CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)
SST
09843-18061  


    C162276E03

  1. Disconnect the connector from the front passenger airbag assembly.

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

    CAUTION:
    Never connect a 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.

  1. Connect the cable to the negative battery terminal, 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 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 the DTCs (Click here).

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

    Text in Illustration 
    *1
    		Front Passenger Side Squib
    *2
    		Center Airbag Sensor Assembly
    *3
    		Front view of wire harness connector
    (to Front Passenger Side Squib)
    *4
    		Connector E
    *5
    		Color: Orange
    *6
    		Front view of DLC3
    *7
    		DTC 52

    HINT:
    DTCs other than 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 CONNECTOR

  1. Turn the ignition switch off.

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

  1. Disconnect the SST from connector E.

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

  1. Check the instrument panel wire connector and terminals (on the center airbag sensor assembly side) and check that the connector is properly connected to the center airbag sensor assembly.
    Result 
    Result
    		Proceed to
    No problem.
    		A
    Connector or terminals incorrect.
    		B
    Connector connected improperly.
    		C



B
REPLACE INSTRUMENT PANEL WIRE

C
CONNECT CONNECTOR PROPERLY
A


4.CHECK INSTRUMENT PANEL WIRE (NO. 2 INSTRUMENT PANEL WIRE - CENTER AIRBAG SENSOR)


    H100200E04

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

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

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

    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
      DN1-1 (P+) - Body ground
      		Ignition switch ON
      		Below 1 V
      DN1-2 (P-) - Body ground
      		Ignition switch ON
      		Below 1 V

      Text in Illustration 
      *1
      		Front Passenger Side Squib
      *2
      		No. 2 Instrument Panel Wire
      *3
      		Instrument Panel Wire
      *4
      		Center Airbag Sensor Assembly
      *5
      		Rear view of wire harness connector
      (to No. 2 Instrument Panel Wire)
      *6
      		Connector C

  1. Check for 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
      DN1-1 (P+) - DN1-2 (P-)
      		Always
      		Below 1 Ω

  1. Check for 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
      DN1-1 (P+) - Body ground
      		Always
      		1 MΩ or higher
      DN1-2 (P-) - Body ground
      		Always
      		1 MΩ or higher

  1. Check for 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
      DN1-1 (P+) - DN1-2 (P-)
      		Always
      		1 MΩ or higher

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



NG
REPLACE INSTRUMENT PANEL WIRE
OK


5.CHECK CONNECTOR

  1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.

  1. Check the instrument panel wire connector and terminals (on the No. 2 instrument panel wire side) and check that the connector is properly connected to the No. 2 instrument panel wire.
    Result 
    Result
    		Proceed to
    No problem.
    		A
    Connector or terminals incorrect.
    		B
    Connector connected improperly.
    		C



B
REPLACE NO. 2 INSTRUMENT PANEL WIRE

C
CONNECT CONNECTOR PROPERLY
A


6.CHECK NO. 2 INSTRUMENT PANEL WIRE (FRONT PASSENGER SIDE SQUIB - INSTRUMENT PANEL WIRE)


    C162277E03

  1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.

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

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

    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
      N1-1 (P-) - Body ground
      		Ignition switch ON
      		Below 1 V
      N1-2 (P+) - Body ground
      		Ignition switch ON
      		Below 1 V

      Text in Illustration 
      *1
      		Front Passenger Side Squib
      *2
      		No. 2 Instrument Panel Wire
      *3
      		Instrument Panel Wire
      *4
      		Center Airbag Sensor Assembly
      *5
      		Front view of wire harness connector
      (to Front Passenger Side Squib)
      *6
      		Connector E
      *7
      		Color: Orange

  1. Check for 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
      N1-1 (P-) - N1-2 (P+)
      		Always
      		Below 1 Ω

  1. Check for 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
      N1-1 (P-) - Body ground
      		Always
      		1 MΩ or higher
      N1-2 (P+) - Body ground
      		Always
      		1 MΩ or higher

  1. Check for 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
      N1-1 (P-) - N1-2 (P+)
      		Always
      		1 MΩ or higher

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



NG
REPLACE NO. 2 INSTRUMENT PANEL WIRE
OK


7.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    H102140E04

  1. Connect the connectors to the front passenger airbag assembly, the No. 2 instrument panel wire and the center airbag sensor assembly.

  1. Connect the cable to the negative battery terminal, 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 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 the DTCs (Click here).

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

    Text in Illustration 
    *1
    		Front Passenger Side Squib
    *2
    		Center Airbag Sensor Assembly
    *3
    		Front view of DLC3
    *4
    		DTC 52

    HINT:
    DTCs other than 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)