Cid 1785 Fmi 04 Intake Manifold Pressure Sensor Voltage Low; Cid 1785 Fmi 10 Intake Manifold Pressure Signal Abnormal Rate Of Change - Perkins 1106D Troubleshooting Manual

SENR9982
Possible Performance Effect:
•
The engine will be derated.
Troubleshooting:
This diagnostic code can be caused by an open
circuit or a short to another power source.
Perform the following diagnostic procedure: "Engine
Pressure Sensor Open or Short Circuit - Test"
Results:
•
OK – STOP.
CID 1785 FMI 04 Intake
Manifold Pressure Sensor
voltage low
Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects the
following conditions:
•
The signal voltage from the intake manifold
pressure sensor is less then 0.2 VDC for at least
two seconds.
• The ECM has been powered for two seconds.
•
Diagnostic code 0168-01 is not active.
•
No 0262 codes for the 5 volt supply are active.
• The keyswitch is in the "ON" position so that the
ECM is energized.
System Response:
If equipped, the warning light will be on. The ECM
will log the diagnostic code. The ECM will trigger a
snapshot. The data for the intake manifold pressure
will be set to a maximum valid pressure for two
seconds. The ECM will then flag the intake manifold
pressure as being invalid. A default value is then
used for the intake manifold pressure.
For engines with an electronically controlled
wastegate, the current for the wastegate solenoid
will be set to a default value while this code is active.
This will derate the engine. The derate will prevent
any overpressure in the intake manifold which could
be caused by an overspeed of the turbocharger.
Possible Performance Effect:
•
The engine will be derated.
Troubleshooting:
This code can be caused by a short to ground or a
shorted sensor.
Perform the following diagnostic procedure: "Engine
Pressure Sensor Open or Short Circuit - Test"
Results:
•
OK – STOP.
i02413010
CID 1785 FMI 10 Intake
Manifold Pressure Signal
abnormal rate of change
Conditions Which Generate This Code:
This diagnostic code is designed to detect the loss of
the 5 volt supply at the sensor connector.
The Electronic Control Module (ECM) detects the
following conditions:
•
The engine speed is more than 1000 rpm.
•
The intake manifold pressure
is within the acceptable range.
The acceptable range for ratings below 168 kW
(225 hp) is 146 kPa (21 psi) to 210 kPa (30.4 psi).
The acceptable range for ratings above 168 kW
(225 hp) is 120 kPa (17.4 psi) to 186 kPa (27 psi).
•
The intake manifold pressure remains abnormally
constant.
•
For ratings below 168 kW (225 hp), the
intake manifold pressure changes by less
than 0.35 kPa (0.05 psi) in 30 seconds.
For ratings above 168 kW (225 hp), the intake
manifold pressure changes by less than 0.55 kPa
(0.08 psi) in 30 seconds.
•
No 0262 codes for the 5 volt supply are active.
•
Diagnostic code 0168-01 is not active.
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Troubleshooting Section
i02413029