PRE-HEATING SYSTEM ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Note

Turn the ignition switch off for 60 seconds before performing the following inspections.

PROCEDURE


  1. INSPECT LIGHTING DURATION OF GLOW INDICATOR LIGHT


    1. Turn the ignition switch to ON and measure the duration of time that the light remains illuminated.

      A005HFAE02
      Light illumination duration
      Refer to the graph and the table *1
      *1: Lighting duration depending on atmospheric pressure.
      Text in Illustration
      *a Second *b Glow Time
      *c Engine Coolant Temperature - -

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

      Light Illumination Duration

      Engine Coolant Temperature

      °C (°F)

      Light Illumination Time

      (sec.)
      -25 (-13) 10
      -10 (14) 6
      0 (32) 4.5
      20 (68) 0.5
      40 (104) 0.5
      60 (140) 0.5

  2. INSPECT PRE-HEATING


    1. Turn the ignition switch to ON and measure the length of time that battery voltage is applied to the glow plugs.

      A005GLHE02
      Pre-heating time
      Refer to the graph *1
      *1: Pre-heating time changes depending on battery voltage and engine coolant temperature.

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

    2. Turn the ignition switch to the START position and check that the battery voltage is applied to the glow plugs.

    3. While cranking the engine, measure the length of time that battery voltage is applied to the glow plugs.

      Pre-heating time
      Refer to the graph *1
      *1: Pre-heating time changes depending on battery voltage and engine coolant temperature.
      Text in Illustration
      *a Second *b Pre-heating Time
      *c Battery Voltage [V] - -

      Note

      Do not start the engine.

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

  3. INSPECT AFTER GLOW TIME


    1. A005LR4E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Glow Plug Relay)

      Remove the glow plug relay.

    2. After the engine starts, measure the length of time that battery voltage remains present.

      A005LJSE02
      After Glow Time
      Tester Connection Condition Specified Condition
      B76-2 - Body ground - Refer to the graph above*1

      *1: After glow time depending on atmospheric pressure and engine coolant temperature.

      Text in Illustration
      *a Second *b After Glow Time
      *c Engine Coolant Temperature - -

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