
130
KENR6933
Troubleshooting Section
B.
Use the electronic service tool to check for active
diagnostic codes. Record all active diagnostic
codes.
C.
Determine if the fault is related to an open circuit
diagnostic code or a short circuit diagnostic code.
Expected Result:
Either a short circuit diagnostic code is active or an
open circuit diagnostic code is active.
Results:
•
OK - SHORT Circuit – A “Voltage Above Normal”
diagnostic code is active at this time. Proceed to
Test Step 4.
•
OK - OPEN Circuit – A “Voltage Below Normal”
diagnostic code is active at this time. Proceed to
Test Step 5.
•
Not OK – A short circuit diagnostic code is not
active. An open circuit diagnostic code is not
active. An intermittent fault may exist.
Repair:
Use the electronic service tool to perform
a “Wiggle Test”. If faults are indicated then go to
the appropriate procedure.
STOP.
Test Step 4. Disconnect The Sensor In
Order To Create An Open Circuit
A.
Turn the keyswitch to the OFF position.
B.
Disconnect the sensor connector of the sensor
with the short circuit diagnostic code.
C.
Turn the keyswitch to the ON position. Wait at
least 10 seconds for activation of the diagnostic
codes.
D.
Use the electronic service tool to check the “Active
Diagnostic Code” screen. Check for a “Voltage
Below Normal” diagnostic code.
Expected Result:
A “Voltage Below Normal” diagnostic code for the
disconnected sensor is now active.
Results:
•
OK – A “Voltage Above Normal” diagnostic code
was active before disconnecting the sensor. An
“Voltage Below Normal” diagnostic code became
active after disconnecting the sensor. Proceed to
Test Step 6.
•
Not OK – There is a short circuit between the
sensor harness connector and the ECM. Leave the
sensor disconnected. Proceed to Test Step 8.
Test Step 5. Measure the Sensor Supply
Voltage
A.
Turn the keyswitch to the OFF position.
B.
Disconnect the sensor from the engine harness.
C.
Turn the keyswitch to the ON position.
D.
Measure the voltage at the plug for the sensor
from the terminal 1 (pressure sensor supply) to
terminal 2 (sensor common).
Expected Result:
The DC voltage from terminal 1 to terminal 2
measures 4.84 to 5.16 Volts DC.
Results:
•
OK – The sensor supply voltage is correct.
Proceed to Test Step 7.
•
Not OK – The sensor supply voltage is out of the
nominal range. Continue testing the sensor supply
circuit.
Repair:
Proceed to the following repair:
Troubleshooting, “5 Volt Sensor Supply Circuit -
Test”
STOP.
Test Step 6. Determine If The Short
Circuit Is In The Connector Or In The
Sensor
A.
Thoroughly inspect the connector for moisture.
B.
Inspect the seals and reconnect the sensor.
C.
Refer to Troubleshooting, “Electrical Connectors
- Inspect”.
D.
If the short circuit diagnostic code reappears, the
sensor or the sensor connector has a fault.
a.
Temporarily connect a new sensor to the
harness, but do not install the new sensor in
the engine.
E.
Use the electronic service tool to check for a short
circuit diagnostic code. The new sensor should be
connected to the harness at this time.
Содержание 1106C Genset
Страница 1: ...May 2007 Troubleshooting 1106C Genset PK Engine KENR6933 00 ...
Страница 19: ...KENR6933 19 Troubleshooting Section g01178875 Illustration 6 ...
Страница 119: ...KENR6933 119 Troubleshooting Section g01244183 Illustration 31 Schematic of the bypass harness connector ...
Страница 186: ...186 KENR6933 Index Section ...
Страница 187: ...KENR6933 187 Index Section ...
Страница 188: ...Copyright 2007 Perkins Engines Company Limited All Rights Reserved Printed in U K ...