Perkins NJ Series Troubleshooting Manual page 123

SENR9982-01
Expected Result:
One of the following diagnostic codes is active:
•
0262-03 5 Volt Sensor DC Power Supply voltage
above normal
• 0262-04 5 Volt Sensor DC Power Supply voltage
below normal
Results:
• OK – Diagnostic code 0262-04 is active. Proceed
to Test Step 3.
• OK – Diagnostic code 0262-03 is active. Proceed
to Test Step 6.
• Not OK – Diagnostic codes 0262-04 and 0262-03
are not active. Proceed to Test Step 4.
Test Step 3. Disconnect the Sensors
A. Turn the keyswitch to the ON position.
B. Use the Perkins EST in order to monitor the
diagnostic codes.
C. Disconnect the pressure sensors one at a time. If
the analog throttle demand sensors are installed,
then disconnect the throttle sensors one at a time.
Wait for 30 seconds after each of the sensors is
disconnected.
Note: Diagnostic code 0262-04 will become inactive
when the sensor that caused the 5 volt diagnostic
code is disconnected.
D. Ensure that all the pressure sensors and the
throttle demand sensors (if equipped) are
disconnected.
Expected Result:
The 5 volt diagnostic code is not active when all of
the sensors are disconnected.
Results:
• OK – The 5 volt diagnostic code is not active when
all of the sensors are disconnected.
Repair: Reconnect all of the sensors except the
suspect sensor.
Proceed to Test Step 4.
•
Not OK – Diagnostic code 0262-04 is still active.
Repair: Leave all of the sensors disconnected.
Proceed to Test Step 5.
Test Step 4. Install a New Sensor
A. Remove the connector from the suspect sensor
and connect the connector to a replacement
sensor. Do not install the replacement sensor to
the engine.
B. Use the Perkins EST in order to monitor the
diagnostic codes.
Expected Result:
Diagnostic codes 0262-03 and 0262-04 are not
active.
Results:
•
OK – The 5 volt diagnostic code is not active.
Repair: Use the Perkins EST in order to clear all
logged diagnostic codes. Remove the suspect
sensor and then install the replacement sensor.
Connect the connector to the sensor.
Verify that the repair eliminates the fault.
STOP.
• Not OK – The 5 volt diagnostic code is still active.
Repair: Do not use the new sensor.
Proceed to Test Step 5.
Test Step 5. Disconnect the ECM
Connector and Check for Active
Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the Perkins EST to the diagnostic
connector.
C. Check the ECM connectors for corrosion and
moisture.
D. Disconnect the P2 ECM connector from the ECM.
E. If a P1:41 is installed, then temporarily disconnect
the pin. If a P1:42 is installed, then temporarily
disconnect the pin.
F. Reconnect the P1 connector to the ECM.
G. Turn the keyswitch to the ON position.
H. Check for active diagnostic codes on the Perkins
EST.
Note: A "voltage high" diagnostic code (open circuit)
should be active for all of the following sensors:
•
Engine pressure sensors
123
Troubleshooting Section