Toyota Corolla (E120): Inspection procedure

1 Check d squib circuit(airbag sensor assy center – horn button assy)

  1. Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
  2.  disconnect the connectors between the horn button assy and the airbag sensor assy center.
  3.  for the black connector (on the spiral cable sub–assy side) between the horn button assy and the spiral cable sub–assy, measure the resistance between d2+ and d2–.

    Ok: resistance: below 1 Ω

2 Check air bag sensor assy center

2 Check air bag sensor assy center

Sst 09843–18040

  1. Connect the connector to the airbag sensor assy center.
  2.  using a service wire, connect d2+ and d2– of the black connector (on the spiral cable sub–assy side) between the horn button assy and the spiral cable sub–assy.
  3.  connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.
  4.  turn the ignition switch to on, and wait at least for 20 seconds.
  5.  clear the dtc stored in memory .
  6.  turn the ignition switch to lock, and wait at least for 20 seconds.
  7.  turn the ignition switch to on, and wait at least for 20 seconds.
  8.  check the dtc .

    Ok: dtc b1181/18 is not output.

Hint

: codes other than code b1181/18 may be output at this time, but they are not relevant to this check.

3 Check d squib

3 Check d squib

Sst 09843–18040

  1. Turn the ignition switch to lock.
  2.  disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
  3.  connect the horn button assy connectors.
  4.  connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.
  5.  turn the ignition switch to on, and wait at least for 20 seconds.
  6.  clear the dtc stored in memory .
  7.  turn the ignition switch to lock, and wait at least for 20 seconds.
  8.  turn the ignition switch to on, and wait at least for 20 seconds.
  9.  check the dtc .

    Ok: dtc b1181/18 is not output.

Hint

: codes other than code b1181/18 may be output at this time, but they are not relevant to this check.

Use simulation method to check

Use simulation method to check

4 Check instrument panel wire(airbag sensor assy center – spiral cable sub–assy)

  1. Disconnect the connector of the instrument panel wire.
  2.  for the connector (on the spiral cable sub–assy side) between the airbag sensor assy center and the spiral cable sub–assy, measure the resistance between d2+ and d2–.

    Ok: resistance: below 1 w

5 Check spiral cable sub–assy

5 Check spiral cable sub–assy

  1. For the black connector (on the spiral cable sub–assy side) between the horn button assy and the spiral cable sub–assy, measure the resistance between d2+ and d2–.

    Ok: resistance: below 1 Ω

Use simulation method to check

Use simulation method to check

    Share this page:

    Other materials:

    Selecting wheel set (vehicles with a tire pressure warning system)
    Your vehicle is equipped with a tire pressure warning system with a function to register two sets of ID codes. This allows for registration of a second wheel set, for example a winter set. The wheel set can be changed only if a second wheel set has been registered to the system. If a second wheel s ...

    Changing the passkey
    1 Select “Passkey” using . 2 Input a 4 to 8-digit passkey using . Input the number 1 digit at a time. 3 When the entire number to be registered as a passkey has been input, press again. If the passkey to be registered has 8 digits, pressing again is not necessary. ...

    Circuit description
    This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the signal from the ecu. If a malfunction occurs in the actuator or speed sensor, etc. During cruise control operation, the rotor shaft between the motor and control plate is released. ...