Troubleshooting

68 RENR2696-01
Troubleshooting Section
•
The ECM has been powered for at least fifteen
seconds.
•
CID 262-03 5V Sensor Power Supply Voltage More
Than Normal an
d CID 262-04 5V Sensor Power
Supply Voltage Less Than Normal are not active.
System Respon
se:
The ECM will set the intake manifold pressure to a
default value
.
The electronic service tool will display “Open/Short
High” for the
intake manifold pressure on the status
screen.
The ECM will g
enerate a CID 102 FMI 03 diagnostic
code on the Data Link. The diagnostic code will be
displayed on a d iagnostic screen of the electronic
service tool
.
Possible Performance Effect:
Theenginecouldhavelowpowerwhilethediagnostic
code is active.
Perform the following diagnostic procedure: “Engine
Pressure Sensor Open or Short Circuit - Test”
Results:
•
OK – STOP.
i01798149
CID 0102 FMI
04 Intake
Manifold Pressure Sensor
Shorted Low
Condition
s Which Generate This Code:
The Electronic Control Module (ECM) detects all of
the follow
ing conditions:
•
The ECM detects a signal voltage that is below
normal.
•
The ECM has been powered for at least fifteen
seconds.
•
CID 262-03 5V Sensor Power Supply, Voltage
More Than
Normal and CID 262-04 5V Sensor
Power Supply, Voltage Less Than Normal are not
active.
System Response:
The ECM will set intake manifold pressure to a
default value.
The electronic service tool will display “Short to
Ground” for the intake manifold pressure on the
status screen
.
The ECM will generate a CID 102 FMI 04 diagnostic
code on the Dat
aLink.Thediagnosticcodewillbe
displayed on a diagnostic screen of the electronic
service tool.
Possible Pe rformance Effect:
The engine co
uld have low power while the diagnostic
code is active.
Perform the f
ollowing diagnostic procedure: “Engine
Pressure Sensor Open or Short Circuit - Test”
Results:
•
OK – STOP.
i01877642
CID 0102 FMI 10 Intake
Manifold Pr
essure Sensor
Power Sup ply Open Circuit
Conditions Which G enerate This Code:
If the 5 volt connection to the sensor is an open
circuit, this fault will result in a logged code.
The Electronic Control Module (ECM) detects all of
the following conditions:
•
No other CID 0262 or CID 0102 codes are active.
•
The engine s
peed is greater than 600 rpm.
•
The pressure sensor signal from the intake
manifold i
s within the expected range for this failure
mode.
•
The pressu
re sensor signal from the intake
manifold remains abnormally constant because the
variations in the sensor signal are too small.
•
All of the above conditions occur simultaneously
for a period of 30 seconds.