The instrument panel cluster verifies that the system functions properly when the ignition switch is turned to ON.
If it is normal, the LED operates as follows.
1) The following illuminate when the ignition switch is in the ON position, and turn OFF after the engine is started.
2) The following illuminate for a few seconds from when the ignition switch is turned to the ON position, and then turn OFF.
Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster diagnostics".