DTC    B1810/53    Short in Driver Side Squib 2nd Step Circuit

DTC    B1811/53    Open in Driver Side Squib 2nd Step Circuit

DTC    B1812/53    Short to GND in Driver Side Squib 2nd Step Circuit

DTC    B1813/53    Short to B+ in Driver Side Squib 2nd Step Circuit

for Preparation Click here


DESCRIPTION

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

DTC No.
DTC Detecting Condition
Trouble Area
B1810/53
  1. The center airbag sensor assembly receives a line short circuit signal 5 times in the driver side squib 2nd step circuit during primary check.
  2. Driver side squib 2nd step malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib 2nd step)
  4. Center airbag sensor assembly
B1811/53
  1. The center airbag sensor assembly receives an open circuit signal in the driver side squib 2nd step circuit for 2 seconds.
  2. Driver side squib 2nd step malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib 2nd step)
  4. Center airbag sensor assembly
B1812/53
  1. The center airbag sensor assembly receives a short circuit to ground signal in the driver side 2nd step circuit for 0.5 seconds.
  2. Driver side squib 2nd step malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib 2nd step)
  4. Center airbag sensor assembly
B1813/53
  1. The center airbag sensor assembly receives a short circuit to B+ signal in the driver side squib 2nd step circuit for 0.5 seconds.
  2. Driver side squib 2nd step malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Spiral cable
  3. Steering pad (Driver side squib 2nd step)
  4. Center airbag sensor assembly

WIRING DIAGRAM


H001451E10


INSPECTION PROCEDURE

HINT:
  1. Perform the simulation method by selecting the "check mode" (signal check) with the intelligent tester (Click here).
  2. After selecting the "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 STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)


    C109500E01

  1. Turn the engine switch off.

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

  1. Disconnect the connectors from the steering pad.

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

    CAUTION:
    Never connect a tester to the steering pad (Driver side squib 2nd step) for measurement, as the may lead to a serious injury due to airbag deployment.

    NOTICE:
    1. Do not forcibly insert the SST into the terminals of the connector when connecting.
    2. Insert straight the SST into the terminals of the connector.

SST
09843-18060  

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

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

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

  1. Turn the engine switch off.

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

  1. Check the DTCs (Click here).

    OK:
    DTC B1810, B1811, B1812, B1813 or 53 is not output.

    HINT:
    Codes other than DTC B1810, B1811, B1812, B1813, and 53 may be output at this time, but they are not related to this check.



OK
REPLACE STEERING PAD
NG


2.CHECK CONNECTOR

  1. Turn the engine switch off.

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

  1. Disconnect the SST from connector "E".

  1. Check that the spiral cable connectors (on the steering pad side) are not damaged.

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



NG
REPLACE SPIRAL CABLE
OK


3.CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT


    H043070E02

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

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

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

    2. Turn the engine switch on (IG).

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

      Voltage:
      Tester connection
      		Condition
      		Specified condition
      D2+ - Body ground
      		Engine switch on (IG)
      		Below 1 V
      D2- - Body ground
      		Engine switch on (IG)
      		Below 1 V

  1. Check the open in the circuit.

    1. Turn the engine switch off.

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

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

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      D2+ - D2-
      		Always
      		Below 1 Ω

  1. Check the short to ground in the circuit.

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

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      D2+ - Body ground
      		Always
      		1 MΩ or higher
      D2- - Body ground
      		Always
      		1 MΩ or higher

  1. Check the 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.

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      D2+ - D2-
      		Always
      		1 MΩ or higher



NG
CHECK INSTRUMENT PANEL WIRE
OK


4.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    H043413E01

  1. Connect the connectors to the steering pad and the center airbag sensor assembly.

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

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

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

  1. Turn the engine switch off.

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

  1. Check the DTCs (Click here).

    OK:
    DTC B1810, B1811, B1812, B1813 or 53 is not output.

    HINT:
    Codes other than DTC B1810, B1811, B1812, B1813 and 53 may be output at this time, but they are not related to this check.



NG
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK

USE SIMULATION METHOD TO CHECK 

5.CHECK INSTRUMENT PANEL WIRE


    H043066E09

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

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

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

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

    4. Turn the engine switch on (IG).

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

      Voltage:
      Tester connection
      		Condition
      		Specified condition
      L21-4 (D2+) - Body ground
      		Engine switch on (IG)
      		Below 1 V
      L21-3 (D2-) - Body ground
      		Engine switch on (IG)
      		Below 1 V

  1. Check the open in the circuit.

    1. Turn the engine switch off.

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

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

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      L21-4 (D2+) - L21-3 (D2-)
      		Always
      		Below 1 Ω

  1. Check the short to ground in the circuit.

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

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      L21-4 (D2+) - Body ground
      		Always
      		1 MΩ or higher
      L21-3 (D2-) - Body ground
      		Always
      		1 MΩ or higher

  1. Check the 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.

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      L21-4 (D2+) - L21-3 (D2-)
      		Always
      		1 MΩ or higher



NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK


6.CHECK SPIRAL CABLE


    H043065E02

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

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

    2. Turn the engine switch on (IG).

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

      Voltage:
      Tester connection
      		Condition
      		Specified condition
      D2+ - Body ground
      		Engine switch on (IG)
      		Below 1 V
      D2- - Body ground
      		Engine switch on (IG)
      		Below 1 V

  1. Check the open in the circuit.

    1. Turn the engine switch off.

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

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

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      D2+ - D2-
      		Always
      		Below 1 Ω

  1. Check the short to ground in the circuit.

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

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      D2+ - Body ground
      		Always
      		1 MΩ or higher
      D2- - Body ground
      		Always
      		1 MΩ or higher

  1. Check the 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.

      Resistance:
      Tester connection
      		Condition
      		Specified condition
      D2+ - D2-
      		Always
      		1 MΩ or higher



NG
REPLACE SPIRAL CABLE
OK

USE SIMULATION METHOD TO CHECK