SELF-REGULATING GLOW SYSTEM CHECK

1.Check that the battery voltage is 11 - 13 V.

2.Check that the engine coolant temperature is 40°C or less.

note

If the engine coolant temperature is too high, disconnect the engine coolant temperature sensor connector.

3.Measure the resistance between the glow plug plate and the glow plug body (earth).
Standard value: 0.12 - 0.38 Ω (at 20°C)

note

The resistance value is the parallel resistance value for the four glow plugs.

4.Connect a voltmeter between the glow plug plate and the glow plug body (earth).
5.Measure the voltage immediately after the ignition switch is turned to ON (without starting the engine).
Standard value: 9 - 11 V (Drops to 0 V after 4 - 8 seconds have passed)

note

The time during which the voltage appears (energizing time) will depend on the engine coolant temperature.

6.Disconnect the injector connector all cylinder.
7.Measure the voltage while the engine is cranking.
Standard value: 6 V or more
8.Connect the injector connector all cylinder.

9.Use the M.U.T.-III to erase the diagnosis codes.

note

This will erase the diagnosis code resulting from the injector connector being disconnected.

10.Start the engine and measure the voltage while the engine is warming up.
However, if the engine coolant temperature rises above 60°C or when 180 seconds have passed since the engine was started, the voltage will always return to 0 V. (Refer to the Glow Plug Energization Timing Chart.)
Standard value: 12 - 15 V

Glow Plug Energization Timing Chart <Reference>