Toyota Corolla (E120): Circuit descriptionCircuit 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 b0138/72 is recorded when a b+ short is detected in the p/t squib (lh) circuit.

Wiring diagram

Wiring diagram

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    Repair
    1. Steering off center repair procedure Inspect steering wheel off center.  Apply masking tape on the top center of the steering wheel and steering column upper cover.  Driving the vehicle on a straight line for 100 meters at a constant speed of 35 mph (56 km/h), and ho ...

    Inspection procedure
    Hint: hand–held tester only: narrowing down the trouble area is possible by performing ”a/f control” active test (heated oxygen sensor or other trouble areas can be distinguished). Perform active test using hand–held tester (a/f control). Hint: ”a/f control” is the active te ...

    Transmission wire (atm)
    Replacement 1. Remove transmission valve body assy 2. Remove transmission wire Disconnect the transmission wire connector.  removal the bolt and transmission wire. 3. Install transmission wire Coat a o–ring with atf.  install the transmission wire and bolt. To ...