PRE-HEATING SYSTEM (w/o DPF) ON-VEHICLE INSPECTION


  1. CHECK ILLUMINATION DURATION OF GLOW INDICATOR LIGHT


    1. Check the light illumination duration.

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      1. Turn the ignition switch ON, and then measure the light illumination duration.

        Light illumination duration
        See graph.

        If the result is not as specified, inspect the ECM, engine coolant temperature sensor, glow plug and glow relay.

        Tech Tips

        Actual light illumination duration may vary slightly from the graph.

      2. Turn the ignition switch OFF.

  2. CHECK PRE-HEATING


    1. Inspect the pre-heating time.

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      1. Turn the ignition switch ON. Measure how long it takes for battery voltage to be applied to the glow plugs.

        Standard pre-heating time
        Engine Coolant Temperature Specified Condition
        40 °C (104°F) or higher 1 second
        Below 40 °C (104°F)

        See graph

        (maximum: 21 seconds)

        If the result is not as specified, inspect the ECM, engine coolant temperature sensor, glow plug and glow relay.

      2. Turn the ignition switch OFF.

    2. Turn the ignition switch to START. Check that battery voltage is applied to the glow plugs.

    3. While cranking the engine, measure how long it takes for battery voltage to be applied to the glow plugs.

      Standard pre-heating time
      Engine Coolant Temperature Specified Condition
      40 °C (104°F) or higher 1 second
      Below 40 °C (104°F)

      See graph

      (maximum: 21 seconds)

      If the result is not as specified, inspect the ECM, engine coolant temperature sensor, glow plug and glow relay.

  3. CHECK AFTERGLOW


    1. Check the afterglow time.


      1. After the engine starts, measure how long it takes for battery voltage to be applied to terminals E7-15 (GREL) and E5-7 (E1) of the ECM.

        Standard afterglow time
        Tester Connection Specified Condition
        E7-15 (GREL) - E5-7 (E1) See graph
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        If the result is not as specified, inspect the ECM, engine coolant temperature sensor, glow plug and glow relay.