DTC    B1800/51    Short in Driver Side Squib Circuit

DTC    B1801/51    Open in Driver Side Squib Circuit

DTC    B1802/51    Short to GND in Driver Side Squib Circuit

DTC    B1803/51    Short to B+ in Driver Side Squib Circuit

for Preparation Click here


DESCRIPTION

  1. The driver side squib circuit consists of the center airbag sensor assembly, the spiral cable and the steering pad.
  2. The circuit signals the SRS to deploy when deployment conditions are met.
  3. These DTCs are recorded when a malfunction is detected in the driver side squib circuit.

DTC No.
DTC Detection Condition
Trouble Area
B1800/51
When one of following conditions is met:
  1. Center airbag sensor assembly detects line short circuit signal in driver side squib circuit 5 times during primary check
  2. Driver side squib malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib)
  4. Center airbag sensor assembly
B1801/51
When one of following conditions is met:
  1. Center airbag sensor assembly detects open circuit signal in driver side squib circuit for 2 seconds
  2. Driver side squib malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib)
  4. Center airbag sensor assembly
B1802/51
When one of following conditions is met:
  1. Center airbag sensor assembly detects short circuit to ground signal in driver side squib circuit for 0.5 seconds
  2. Driver side squib malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib)
  4. Center airbag sensor assembly
B1803/51
When one of following conditions is met:
  1. Center airbag sensor assembly detects short circuit to B+ signal in driver side squib circuit for 0.5 seconds
  2. Driver side squib malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib)
  4. Center airbag sensor assembly

WIRING DIAGRAM


C196966E01


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 steering pad.

  1. Check the spiral cable connector and terminals (on the steering pad side) and check that the connector is properly connected to the steering pad.
    Result 
    Result
    		Proceed to
    No problem.
    		A
    Connector or terminals incorrect.
    		B
    Connector connected improperly.
    		C



B
REPLACE SPIRAL CABLE (Click here)

C
CONNECT CONNECTOR PROPERLY
A


2.INSPECT STEERING PAD (DRIVER SIDE SQUIB)
SST
09843-18061  


    C196967E01

  1. Disconnect the connector from the steering pad.

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

    CAUTION:
    Never connect a tester to the steering pad (driver 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. Turn the steering wheel lock to lock 5 times or more.

  1. Check the DTCs (Click here).

    OK:
    DTC B1800, B1801, B1802, B1803 or 51 is not output.

    Text in Illustration 
    *1
    		Driver Side Squib
    *2
    		Spiral Cable
    *3
    		Center Airbag Sensor Assembly
    *4
    		Front view of wire harness connector
    (to Driver Side Squib)
    *5
    		Connector E
    *6
    		Color: Orange
    *7
    		Front view of DLC3
    *8
    		DTC 51

    HINT:
    DTCs other than B1800, B1801, B1802, B1803 and 51 may be output at this time, but they are not related to this check.



NG
Go to step 3
OK

REPLACE STEERING PAD (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 spiral cable.

  1. Check the instrument panel wire connector and terminals (on the spiral cable side) and check that the connector is properly connected to the spiral cable.
    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 SPIRAL CABLE (DRIVER SIDE SQUIB - INSTRUMENT PANEL WIRE)


    C162275E03

  1. Disconnect the instrument panel wire connector from the spiral cable.

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

      Text in Illustration 
      *1
      		Driver Side Squib
      *2
      		Spiral Cable
      *3
      		Instrument Panel Wire
      *4
      		Center Airbag Sensor Assembly
      *5
      		Front view of wire harness connector
      (to Driver 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
      1 (D-) - 2 (D+)
      		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
      1 (D-) - Body ground
      		Always
      		1 MΩ or higher
      2 (D+) - 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
      1 (D-) - 2 (D+)
      		Always
      		1 MΩ or higher

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



NG
REPLACE SPIRAL CABLE (Click here)
OK


5.CHECK CONNECTOR

  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


6.CHECK INSTRUMENT PANEL WIRE (SPIRAL CABLE - CENTER AIRBAG SENSOR ASSEMBLY)


    C162274E03

  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
      D44-1 (D+) -
      Body ground
      		Ignition switch ON
      		Below 1 V
      D44-2 (D-) -
      Body ground
      		Ignition switch ON
      		Below 1 V

      Text in Illustration 
      *1
      		Driver Side Squib
      *2
      		Spiral Cable
      *3
      		Instrument Panel Wire
      *4
      		Center Airbag Sensor Assembly
      *5
      		Rear view of wire harness connector
      (to Spiral Cable)
      *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
      D44-1 (D+) - D44-2 (D-)
      		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
      D44-1 (D+) -
      Body ground
      		Always
      		1 MΩ or higher
      D44-2 (D-) -
      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
      D44-1 (D+) - D44-2 (D-)
      		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


7.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    H100855E09

  1. Connect the connectors to the steering pad, spiral cable 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 B1800, B1801, B1802, B1803 or 51 is not output.

    Text in Illustration 
    *1
    		Driver Side Squib
    *2
    		Spiral Cable
    *3
    		Center Airbag Sensor Assembly
    *4
    		Front view of DLC3
    *5
    		DTC 51

    HINT:
    DTCs other than B1800, B1801, B1802, B1803 and 51 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)