TURBO GP-BASIC 2118252 - Caterpillar

Use this procedure to troubleshoot a problem with the DEF tank level. Also, use this procedure if one of the following event codes is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
4367-1
Aftertreatment #1 DEF Tank #2 Level : Low - most severe (3) E955 (3)
Low Aftertreatment #1 DEF Tank #2 Level The Electronic Control Module (ECM) detects that the DEF quick thaw tank level is below a threshold.
The code is logged.
4367-17
Aftertreatment #1 DEF Tank #2 Level : Low - least severe (1) E955 (1)
Low Aftertreatment #1 DEF Tank #2 Level The ECM detects that the DEF quick thaw tank level is below a threshold.
The code is logged.
4367-18
Aftertreatment #1 DEF Tank #2 Level : Low - moderate severity (2) E955 (2)
Low Aftertreatment #1 DEF Tank #2 Level The ECM detects that the DEF quick thaw tank level is below a threshold.
The code is logged.
4367-31
Aftertreatment #1 DEF Tank #2 Level E1589 (2)
Low Aftertreatment #1 DEF Tank #2 Level The ECM detects that the DEF quick thaw tank level is not refilling as fast as expected.
The code is logged.
Table 2
Associated Codes
J1939 Code CDL Code Troubleshooting Procedure
4367-3 3131-3 Troubleshooting, "DEF Tank Sensor - Test"
4367-4 3131-4 Troubleshooting, "DEF Tank Sensor - Test"
5434-3 N/A Troubleshooting, "Solenoid Valve - Test"
5434-4 N/A Troubleshooting, "Solenoid Valve - Test"
Illustration 1 g06088493
(1) Bulk Tank (OEM)
(2) Quick Thaw Tank Refill Valve
(3) Dosing Cabinet
(4) Quick Thaw Tank
(5) Pump (OEM)
(6) Inlet Strainer
(7) Filter (OEM)Probable Causes
DEF level
Sensor
DEF lines
DEF filter
Transfer pump (if equipped)
Relay circuit
DEF StrainerRecommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: An E955, E1589, 4367-1, 4367-17, 4367-18, or 4367-31 code is active.
Proceed to Test Step 2.
2. Inspect the Remote Tank and Supply Lines
A. Remove electrical power from the engine.
B. Visually inspect the remote tank and all the DEF lines between the remote tank and quick thaw tank.
C. Inspect the lines to ensure that the lines are connected and routed properly.
D. Visually inspect the remote tank DEF level.
DEF Lines
Result: The DEF supply line form the remote tank to the quick thaw tank are connected and routed properly.
Proceed to Test Step 3.
Result: The DEF supply lines from the remote tank to the quick thaw tank are not connected or routed properly.
Repair: Repair or replace the damaged DEF line.
Result: The remote tank does not have an adequate level of DEF.
Repair: Perform the following procedure:
1. Ensure that there are no DEF leaks.
2. Fill the remote DEF tank.
3. Perform a power cycle of the engine and aftertreatment system.
4. Check for codes.
If the problem is not resolved, proceed to Test Step 3.
3. Perform a "DEF Tank Refill Solenoid Override"
A. Apply electrical power to the engine.
B. Connect Cat ET.
C. Use Cat ET to perform the following override:
- "DEF Tank Refill Solenoid Override"
D. Use Cat ET to monitor the following:
- "DEF Tank #2 Level"
Note: After the "DEF Tank