System Description
GLOW CONTROL
Engine coolant temperature sensor
E
Engine coolant temperature
ECM
E
Glow relay
E
Glow plugs
Ignition switch
E
Start signal
E
Glow lamp
I
Pre-glow
When the ignition switch is turned on the ON position, the glow
indicator lamp will turn ON and pre-glow starts.
The glow relay is turned ON continuously. The ON time of both
the glow indicator lamp and the glow relay is determined by the
engine coolant temperature. Pre-glow ends when the pre-glow
time elapses or when the engine is started.
I
Intermediate glow
Intermediate glow starts when the pre-glow time has elapsed
and the engine has not been started. The glow relay is turned
ON intermittently. Intermediate glow ends when the intermedi-
ate glow time has elapsed, or when the engine is started.
I
After-glow
After-glow starts as soon as the engine is running and the
engine coolant temperature is below 50°C (122°F). The glow
relay is turned on continuously. After-glow ends when the after-
glow time elapses, or when the engine coolant temperature
exceeds 50°C (122°F).
MEC972D
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMP
TD27Ti
EC-389