Perkins 1106C Genset, Troubleshooting Manual, Page: 88 / 188

88 KENR6933
Troubleshooting Section
i02655634
CID 0172 FMI 03
Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects the
following conditions:
• The signal voltage from the intake manifold air
temperature sensor is greater than 4.95 Volts DC
for more than eight seconds.
•
Engine coolant temperature is above − 10 °C
(15.0 °F).
•
The ECM has been powered for at least two
seconds.
•
Diagnostic code 0168-01 is not active.
System Response:
The ECM will use the default value of 70 °C (158 °F)
for the intake manifold air temperature. “Voltage
High” will be displayed next to the status for “Intake
Manifold Air Temperature” on the electronic service
tool.
If equipped, the warning light will be on. The ECM will
log the diagnostic code.
Possible Performance Effect:
•
Poor stability
•
Poor cold running
•
White smoke
•
Black smoke
•
Poor acceleration under load
Troubleshooting:
This fault can be caused by an open circuit or a short
to a power source.
Perform the following diagnostic procedure: “Engine
Temperature Sensor Open or Short Circuit - Test”
Results:
•
OK – STOP.
i02655635
CID 0172 FMI 04
Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects the
following conditions:
• The signal voltage from the intake manifold air
temperature sensor is less than 0.2 Volts DC for
more than eight seconds.
•
The ECM has been powered for at least two
seconds.
•
Diagnostic code 0168-01 is not active.
System Response:
The ECM will use the default value of 70 °C (158 °F)
for the intake manifold air temperature. “Voltage
Low” will be displayed next to the status for “Intake
Manifold Air Temperature” on the electronic service
tool.
If equipped, the warning light will be on. The ECM will
log the diagnostic code.
Possible Performance Effect:
•
Poor stability
• Poor cold running
•
White smoke
•
Black smoke
• Poor acceleration under load
Troubleshooting:
This fault can be caused by a sensor that is shorted
to ground or a sensor that is internally shorted.
Perform the following diagnostic procedure: “Engine
Temperature Sensor Open or Short Circuit - Test”
Results:
• OK – STOP.