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UEN00244-02
E-5 Automatic warm-up system does not operate (in cold season)
Trouble
• Automatic warm-up system does not operate (in cold season).
• When engine coolant temperature is below 30°C automatic warm-up system raises engine speed to
1,200 rpm.
• If fuel control dial is opened more than 70% for 3 seconds when starting switch is turned ON or after
Related infor-
engine is started, automatic warm-up system is turned OFF. (Automatic warm-up system stops auto-
mation
matically after operating for 10 minutes.)
• If engine coolant temperature is below 10°C turbocharger protection function operates to keep the
engine speed at low idle.
Possible causes
Defective engine coolant
and standard
1
temperature signal system
value in normal
state
2 Defective engine controller
Engine coolant temperature gauge and engine
coolant temperature monitor
18
Cause
a Turn starting switch ON or start engine and carry out trouble-
Monitoring code
Engine coolant
If level of coolant temperature gauge is different from actual coolant
temperature, carry out troubleshooting for E-9 Engine coolant tem-
perature gauge does not indicate normally.
If cause 1 is not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
Standard value in normal state/Remarks on troubleshooting
shooting.
Engine coolant
temperature
04107
temperature
40 Troubleshooting
Coolant temperature
level
105°C
6 (a: Red)
102°C
5 (a: Red)
100°C
4 (a: Blue)
85°C
3 (a: Blue)
60°C
2 (a: Blue)
30°C
1 (a: White)
PC210, 230, 240-8
1
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Troubleshooting
