DEF Pressure Does Not Respond
Show/hide table
| Diagnostic Trouble Codes | |||
|---|---|---|---|
| J1939 Code | CDL Code | Code Description
(code descriptions may vary) |
Comments |
| 5392-31 | E1370 (2) | Aftertreatment Diesel Exhaust Fluid Dosing Unit Loss of Prime | The Electronic Control Module (ECM) detects one of the following conditions:
DEF system pressure was not within the acceptable limits during priming. |
| Follow the troubleshooting procedure to identify the root cause of the problem. | |||
Show/hide table
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
1. Check that the Latest Available Software is Installed A. Ensure that the latest software is installed on the engine ECM. B. Ensure that the latest software is installed on the Dosing Control Unit (DCU) If necessary, refer to Troubleshooting, "ECM Software - Install" for the correct procedure. |
Software |
Result: The latest software is not installed. Repair: Install the latest engine ECM software and then install the latest DCU software. If necessary, refer to Troubleshooting, "ECM Software - Install" for the correct procedure. Start the engine and wait for 2 minutes. If the fault is cleared, return the engine to service. If the fault is still present, proceed to Test Step 2. Result: The latest software is installed. Proceed to Test Step 2. |
2. Check for Associated Diagnostic Codes A. Connect to the electronic service tool. B. Use the electronic service tool to check for active diagnostic codes. Check specifically for diagnostic codes relating to the DEF system. |
Diagnostic codes |
Result: There are associated diagnostic codes. Repair: Troubleshoot the associated diagnostic codes. Refer to Troubleshooting, Diagnostic Trouble Codes or refer to Troubleshooting, Event Codes. Result: There are no associated diagnostic codes. Proceed to Test Step 3. |
3. Check the DEF Pressure A. Connect to the electronic service tool B. Start the engine. C. Allow the engine to run for at least 2 minutes whilst monitoring "DEF Pressure" on the electronic service tool. |
Gauge position |
Result: The DEF pressure is less than Repair: Troubleshoot the cause of low DEF pressure. Refer to Troubleshooting, DEF Pressure Is Low. Result: The DEF pressure is greater than Repair: Troubleshoot the cause of high DEF pressure. Refer to Troubleshooting, DEF Pressure Is High. Result: The DEF pressure is between Repair: Allow the engine to run for at least 2 minutes. If the DEF system primes successfully, and the 5392–31 E1370 (2) diagnostic is no longer active, return the engine to service. If the 5392–31 E1370 (2) diagnostic code is still active, contact the Dealer Solutions Network (DSN). |
Caterpillar Information System:
990K Wheel Loader and 844K Wheel Dozer Machine Systems Boom Bearings and Seals - Remove and Install
844K Wheel Dozer and 990K Wheel Loader Power Train Parking Brake - Assemble
844K Wheel Dozer and 990K Wheel Loader Power Train Torque Converter (Lockup) - Assemble
990K Wheel Loader and 844K Wheel Dozer Machine Systems Boom - Remove and Install
844K Wheel Dozer and 990K Wheel Loader Power Train Parking Brake - Disassemble
990K Wheel Loader and 844K Wheel Dozer Machine Systems Automatic Lubrication - Remove and Install
990K Wheel Loader and 844K Wheel Dozer Machine Systems Accumulator Charging Valve (Brake) - Remove and Install
990K Wheel Loader and 844K Wheel Dozer Machine Systems Piston Pump (Hydraulic Fan) - Remove and Install
990K Wheel Loader and 844K Wheel Dozer Machine Systems Piston Pump (Implement) - Remove and Install
Check the Dump Body on AD55B, and AD60 Underground Articulated Trucks {7258} Check the Dump Body on AD55B, and AD60 Underground Articulated Trucks {7258}
Improved Transmission Oil Cooler Fan Now Used on AD60 Underground Articulated Trucks {1375} Improved Transmission Oil Cooler Fan Now Used on AD60 Underground Articulated Trucks {1375}
C175-16 Locomotive Engine Fuel Flow Is High
990K Wheel Loader and 844K Wheel Dozer Machine Systems Piston Pump (Brake) - Remove and Install
950L and 962L Wheel Loaders Solenoid Valve (Switch Controlled) - Test
973K Track-Type Loader Machine Systems Cab - Remove and Install
Procedure To Install PLE641 Cellular Radio Product Link In Place Of PLE631 Satellite Radio Product Link, Or PLE631 Satellite Radio Product Link In Place Of PLE641 Cellular Radio Product Link On Certain M-Series Medium Wheel Loaders {7490, 7606, 7610, Procedure To Install PLE641 Cellular Radio Product Link In Place Of PLE631 Satellite Radio Product Link, Or PLE631 Satellite Radio Product Link In Place Of PLE641 Cellular Radio Product Link On Certain M-Series Medium Wheel Loaders {7490, 7606, 7610,
950L and 962L Wheel Loaders Speed Sensor - Test
An Improved Air Lines Group Is Now Used On Certain D5R and D6N Track Type Tractors {1071} An Improved Air Lines Group Is Now Used On Certain D5R and D6N Track Type Tractors {1071}
Improved Tilt Cylinder Head End Relief Valves Are Used on Certain 986H Wheel Loaders {5051, 5051, 5104} Improved Tilt Cylinder Head End Relief Valves Are Used on Certain 986H Wheel Loaders {5051, 5051, 5104}
D6K2 and D6K Electrical & Hydraulic Troubleshooting HVAC, Automatic Temperature Control System
D6K2 and D6K Track-Type Tractor Systems Location of Components (Power Train System)
D6K2 and D6K Track-Type Tractor Systems General Information (Power Train System)
963K Track-Type Loader Machine Systems Fuel Tank - Remove and Install
950L and 962L Wheel Loaders Connector Contact Description