Engine Pressure Sensor Open Or Short Circuit - Test - Perkins 1106D Troubleshooting Manual

SENR9982
Test Step 8. Perform the "Wiggle Test" on
the Perkins Electronic Service Tool (EST)
A. Select the "Wiggle Test" from the diagnostic tests
on the Perkins Electronic Service Tool (EST).
B. Choose the appropriate group of parameters to
monitor.
C. Press the "Start" button. Wiggle the wiring harness
in order to reproduce intermittent faults.
If an intermittent fault exists, the status will be
highlighted and an audible beep will be heard.
Expected Result:
No intermittent faults were indicated during the
"Wiggle Test".
Results:
•
OK – No intermittent faults were found. The
harness and connectors appear to be OK. If you
were sent from another procedure, return to the
procedure and continue testing. If this test has
resolved the fault, return the engine to service.
STOP.
•
Not OK – At least one intermittent fault was
indicated.
Repair: Repair the harness or the connector.
Verify that the repair eliminates the fault.
STOP.
Engine Pressure Sensor Open
or Short Circuit - Test
System Operation Description:
Use this procedure under the following
conditions:
Use this procedure if another procedure has directed
you here. Use this procedure if any of the following
diagnostic codes are active:
•
100-03 Engine Oil Pressure open/short to +batt
•
100-04 Engine Oil Pressure short to ground
•
100-10 Engine Oil Pressure Sensor abnormal rate
of change
•
1785-03 Intake Manifold Pressure Sensor voltage
high
•
1785-04 Intake Manifold Pressure Sensor voltage
low
•
1785-10 Intake Manifold Pressure Signal abnormal
rate of change
•
1797-03 Fuel Rail Pressure Sensor open/short to
+batt
•
1797-04 Fuel Rail Pressure Sensor short to ground
The following background information is related
to this procedure:
The troubleshooting procedures for the diagnostic
codes of each pressure sensor are identical. The
5 volt sensor supply provides power to all 5 volt
sensors. The Electronic Control Module (ECM)
supplies 5.0 ± 0.2 VDC to terminal "A" of each
sensor connector. The sensor common from the
ECM connector goes to terminal "B" of each sensor
connector. The sensor supply is output short circuit
protected. A short circuit to the battery will not
damage the circuit inside the ECM.
Pull-up Voltage
The ECM continuously outputs a pull-up voltage
on the circuit for the sensor signal wire. The ECM
uses this pull-up voltage in order to detect an open
in the signal circuit. When the ECM detects the
presence of a voltage that is above a threshold on the
signal circuit, the ECM will generate an open circuit
diagnostic code (03) for the sensor.
If the sensor is disconnected at the sensor connector,
i02411207
the presence of pull-up voltage at the sensor
connector indicates that the wires from the sensor
connector to the ECM are not open or shorted to
ground. If the sensor is disconnected at the sensor
connector, the absence of pull-up voltage at the
sensor connector indicates an open in the signal wire
or a short to ground. If the sensor is disconnected at
the sensor connector and the voltage at the sensor
connector is different from pull-up voltage, the signal
wire is shorted to another wire in the harness.
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Troubleshooting Section