102 KENR6933
Troubleshooting Section
i02493480
E539 High Intake Manifold Air
Temperature
Conditions Wh
ich Generate This Code:
The Electronic Control Module (ECM) detects
aproblemwith
the engine’s intake manifold air
temperature. The ECM detects the following
problems:
•
The engine has been running for more than 3
minutes.
•
The temperature of the coolant is more than 99 °C
(210 °F) and the intake manifold pressure is more
than 30 kPa (4
.35 psi).
•
The intake manifold air temperature trip level for
the event cod
e is reached.
•
Diagnostic code 0172-03 Intake Manifold Air
Temperatur
e voltage above normal is not active.
•
Diagnostic code 0172-04 Intake Manifold Air
Temperatur
e voltage below normal is not active.
Table 36
Intake Ma nifold Air Temperature Trip Level Table
E539-1 E539-2
Turbocharged Engines (T) 139 °C (282 °F) 142 °C (287 °F)
T urbocharged Aftercooled
Engines (TA)
82 °C (179 °F) 86 °C (186 °F)
Delay to Activation 8 seconds 8 seconds
Reset Time 4 seconds 4 seconds
System Response:
The event code will be logged.
If equipped, the warning lamp will be illuminated.
Possible Performance E ffect:
E539-1
None
E539-2
The ECM will derate the power. The power will be
derated at one percent per second.
The derate of the engine will only occur if the “Enable
Derate” customer programmable parameter has
been enabled.
Troubleshooting:
Refer to Troubleshooting, “Intake Air Temperature
Is Too High”.
Results:
•
OK – STOP.
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