(Table 223, contd)
Troubleshooting Test Steps
Values Results
4. Check for a Low Voltage at the Soot Sensor
A. Turn the keyswitch to the ON position.
B. Measure the voltage across pins 1 and 2 on the soot
sensor.
C. Turn the keyswitch to the OFF position.
Less than 9 VDC Result: The supply voltage is within the acceptable
range for the soot sensor.
Return the unit to service.
Result: The supply voltage is below the acceptable
range for the soot sensor.
Repair: Make sure that any in-line fuses are intact. Re-
place any blown fuses.
Check that the supply voltage is adequate. Refer to Sys-
tems Operation, Testing and Adjusting, “Charging Sys-
tem - Inspect”.
If the supply voltage is satisfactory, inspect the wiring
and the connectors. Refer to Troubleshooting, “Electrical
Power Supply - Test”.
5. Diagnostic Code 4783-12 or 3397-12 is Active
A. If diagnostic code 4783-12 or 3397-12 is active, the soot
sensor has a fault.
Faulty sensor Result: Diagnostic code 4783-12 or 3397-12 is active.
There is a fault in the soot sensor.
Repair: Replace the soot sensor.
6. Check the Soot Antennas
Note: If diagnostic code 4783-21 or 3397-21 is active, the soot
sensor is not receiving a signal from the soot antennas.
Note: If any corrective action is performed, allow a period of
60 seconds for the diagnostic code to disappear.
A. Inspect the coaxial cable. Check each connection for dirt or
water ingress. All connectors must be clean and dry before
connections are made. Verify that all the connectors are se-
curely connected.
B. Torque all coaxial connectors to 1.2 N·m (10.6 lb in).
C. After 60 seconds, check for diagnostic code 4783-21 or
3397-21.
D. If diagnostic code 4783-21 or 3397-21 is still active, contin-
ue with this procedure.
E. Disconnect the coaxial cables from the antennas.
F. Connect the ends of the coaxial cables to Tooling (A).
G. Perform the “DPF Soot Loading Sensor Functional Test” on
the electronic service tool by selecting the following menus:
· “Diagnostics”
· “Diagnostic Tests”
· “DPF Soot Loading Sensor Functional Test”
H. Disconnect the coaxial cables from the attenuator.
Faulty soot antenna Result: The “DPF Soot Loading Sensor Functional Test”
is successful. The fault is in a soot antenna.
Repair: Remove the two soot antennas from the DPF.
Refer to Disassembly and Assembly, “Soot Antenna -
Remove and Install”.
Inspect the soot antennas for damaged or bent probes.
Replace a damaged antenna. If no damage is found, re-
place both antennas.
Install the two soot antennas. Refer to Disassembly and
Assembly, “Soot Antenna - Remove and Install”. Ensure
that the antenna connectors are tightened to a torque of
1.2 N·m (10.6 lb in).
After 60 seconds, confirm that diagnostic code 4783-21
or 3397-21 is no longer active.
Result: The “DPF Soot Loading Sensor Functional Test”
is not successful. The fault is in the soot sensor or a co-
axial cable.
Repair: Replace the soot sensor. Ensure that the anten-
na connectors are tightened to a torque of 1.2 N·m
(10.6 lb in).
Repeat the “DPF Soot Loading Sensor Functional Test”
and confirm that the test is successful.
If the fault has not been eliminated, contact the Dealer
Solutions Network (DSN).
418 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
