Toyota Corolla (E120): Circuit description

The seat belt buckle switch (lh) circuit consists of the airbag sensor assy center and front seat inner belt assy (lh).

Dtc b0126/b0127/27 is recorded when a malfunction is detected in the seat belt buckle switch (lh) circuit.

Wiring diagram

Wiring diagram

Inspection procedure

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    Inspection procedure
    Hint: start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not using the hand–held tester. 1 Read value of hand–held tester(front speed sensor) Select the datalist mode on the hand–held tester.  check that there is no differe ...

    Wiring diagram
    1 Inspect terminal voltage(pi) (a) turn Turn the ignition switch to on.  measure voltage between terminal 5 (pi) of cruise control ecu assy and body ground, when the cruise control main switch button is on and off. Ok: 2 Inspect combination meter assy 3 Check harn ...

    Replacement
    Hint: components: 1. Discharge refrigerant from refrigeration system sst 07110–58060 (07117–58080, 07117–58090, 07117–78050, 07117–88060, 07117–88070, 07117–88080) 2. Disconnect cooler refrigerant suction hose no.1   Remove the bolt and disconnect the cooler refriger ...