Toyota Corolla (E120): Circuit description

The p/t squib (lh) circuit consists of the airbag sensor assy center and seat belt pretensioner (lh).

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

Dtc b0135/73 is recorded when a short is detected in the p/t squib (lh) circuit.

Wiring diagram

Wiring diagram

Inspection procedure

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    For vehicles equipped with catalytic converter
    Caution: if large amount of unburned fuel flows into the converter, it may cause overheating and a fire hazard. To prevent this, observe the following precautions. Use only unleaded gasoline.  avoid prolonged idling. Avoid running the engine at idle speed for more than 20 minutes. ...

    Inspection
    1. Spark plug Notice: never use a wire brush for cleaning. Never attempt to adjust the electrode gap on used spark plug. Spark plug should be replaced every 192,000 km (120,000 miles). Clean the spark plugs. Air pressure: below 588 kpa (6.0 Kg/cm2, 85 psi) duration: 20 sec ...

    Air bag sensor front lh
    Components Replacement Hint: components: 1. Precaution 2. Disconnect battery negative terminal 3. Remove air bag sensor front lh Disconnect the connector from the airbag sensor front lh.  remove the 2 bolts and airbag sensor front lh. 4. Inspect air bag sensor front lh ...