Toyota Corolla (E170) 2014–2019 Owners Manual / Maintenance and care / Maintenance / Emission inspection and maintenance (I/M) programs

Toyota Corolla (E170): Emission inspection and maintenance (I/M) programs

Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system.

If the malfunction indicator lamp comes on

The OBD system determines that a problem exists somewhere in the emission control system. Your vehicle may not pass the I/M test and may need to be repaired. Contact your Toyota dealer to service the vehicle.

Your vehicle may not pass the I/M test in the following situations:

● When the battery is disconnected or discharged Readiness codes that are set during ordinary driving are erased.

Also, depending on your driving habits, the readiness codes may not be completely set.

● When the fuel tank cap is loose The malfunction indicator lamp comes on indicating a temporary malfunction and your vehicle may not pass the I/M test.

When the malfunction indicator lamp still remains on after several driving trips

The error code in the OBD system will not be cleared unless the vehicle is driven 40 or more times.

If your vehicle does not pass the I/M test

Contact your Toyota dealer to prepare the vehicle for re-testing.

    Share this page:

    Other materials:

    If your vehicle overheats
    The following may indicate that your vehicle is overheating. ● Vehicles without a multi-information display: The high engine coolant temperature warning light  comes on or a loss of power is experienced. Vehicles with a multi-information display: The engine coolant temperature gauge&n ...

    Overhaul
    1. Drain brake fluid Notice: wash the brake fluid off immediately if it comes into contact with any painted surface. 2. Remove air cleaner cap sub–assy 3. Remove brake master cylinder sub–assy  disconnect the brake fluid level switch connector from master cylinder reservoir subâ ...

    Inspection procedure
    1 Check low pitched horn assy Connect the positive (+) lead from the battery to the terminal and negative (–) lead to the horn body, and check that the horn blows. 2 Check relay (marking: horn) Remove the relay from the engine room j/b.  check the horn relay conti ...