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HOSE 0878447 - Caterpillar



0878447 HOSE Caterpillar parts HOSE
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Alternative (cross code) number:
CA0878447
087-8447
0878447
Caterpillar 0878447 HOSE

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Table 1
Diagnostic Trouble Code for DEF Tank Temperature Is Low
J1939 Code Description Notes
3031-10 Aftertreatment #1 DEF Tank Temperature : Abnormal Rate of Change The Electronic Control Module (ECM) detects that the DEF tank temperature is not responding when the coolant diverter valve is activated.
The battery voltage is at least 10 V.
The warning lamp will come on.
Follow the troubleshooting procedure to identify the root cause of the problem. Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Associated Diagnostic Trouble Codes
A. Connect the electronic service tool to the diagnostic connector.
B. Turn the keyswitch to the ON position.
C. Use the electronic service tool to check for active diagnostic codes relating to the coolant diverter valve or the DEF tank temperature sensor. Diagnostic Trouble Codes
Result: An associated diagnostic trouble code is present.
Repair: Troubleshoot the associated code. Refer to Troubleshooting, "Diagnostic Trouble Codes".
Result: Diagnostic trouble code 3031-10 is present.
Proceed to Test Step 2.
2. Check the Coolant Level of the Engine
A. Determine if the engine coolant level is full.
Coolant Level
Result: The coolant level is full.
Proceed to Test Step 3.
Result: The coolant level is not full.
Repair: Add coolant to the system.
Repair: Determine the cause of low coolant. Refer to Systems Operation, Testing and Adjusting, "Cooling System" for additional information.
If adding coolant does not correct the fault, proceed to Test Step 3.
3. Check the Engine Coolant Temperature
A. Start the engine. Allow the engine to warm up to normal operating temperature.
B. Connect to the electronic service tool.
C. Select the Status Parameters tab.
D. Check the coolant temperature.
The temperature should be greater than 50° C (122° F).
Coolant temperature
Result: The coolant temperature is greater than 50° C (122° F).
Proceed to Test Step 4.
Result: The coolant temperature is less than 50° C (122° F).
Repair: Refer to Troubleshooting, "Coolant Temperature Is Low" for troubleshooting information.
4. Check for Coolant Leaks
A. Check for coolant leaks in the supply and return lines to the DEF tank header.
Leaks
Result: There are no leaks in the supply or return lines.
Proceed to Test Step 5.
Result: There are leaks in the supply or return lines.
Repair: Repair the leaks and refill the coolant system.
If the fault is still present, proceed to Test Step 5.
5. Inspect the Coolant Lines for Restrictions and Obstructions
A. Check for a restriction or obstruction in the coolant lines between the engine and the DEF tank header.
Restrictions
Result: There is a restriction in a line.
Repair: Repair or replace the lines with the restrictions.
Proceed to Test Step 8.
Result: The coolant lines are OK.
Proceed to Test Step 6.
Illustration 1 g03716402
Table 3
Troubleshooting Test Steps Values Results
6. Check the Electrical Connection at the DEF Tank Header
A. Inspect electrical connector (1) for the DEF tank header. Refer to Troubleshooting, "Electrical Connectors - Inspect" for further information. Refer to Illustration 1.
Check for corrosion or loose wires.
Electrical connections
Result: The electrical connector is not corroded or loose.
Proceed to Test Step 7.
Result: The electrical connector is corroded and/or loose.
Repair: Make the necessary repairs to the connectors. Cycle the keyswitch.
Proceed to Test Step 8.
7. Check the Coolant Diverter Valve


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