Toyota Corolla (E120): Circuit description

The d squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.

It causes the srs to deploy when the srs deployment conditions are satisfied.

Dtc b1180/17 is recorded when a short is detected in the d squib circuit (2nd step).

Wiring diagram

Wiring diagram

Inspection procedure

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    Inspection procedure
    1 Check source voltage Measure the voltage of the battery. Ok: voltage: 10 – 14 v 2 Check air bag sensor assy center Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors from the airbag sensor assy ...

    Replacement
    Hint: components: 1. Place front wheels facing straight ahead 2. Remove front wheels 3. Remove engine under cover lh 4. Remove engine under cover rh 5. Remove exhaust pipe 6. Drain transaxle oil 7. Remove hood sub–assy 8. Remove cylinder head cover no.2 9. Remove air cleaner assy 10. R ...

    Inspection procedure
    1 Check connector Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  check the connection of the combination meter connector and the airbag sensor assy center connectors. Ok: the connectors are connected. 2 Check combination ...