0397573 JOHNSON THROTTLE BODY, Lower, 200TX

Table 1
J1939 Code and Description CDL Code and Description Comments
3031-7
Aftertreatment #1 DEF Tank Temperature : Not Responding Properly E1441 (1)
Aftertreatment #1 DEF Tank Temperature #1 Not Responding The Aftertreatment #1 Diesel Exhaust Fluid Control Unit (DCU) detects that the #1 Diesel Exhaust Fluid (DEF) tank temperature is not responding properly.
The code is logged.
4427-7
Aftertreatment #2 DEF Tank Temperature : Not Responding Properly E1742 (1)
Aftertreatment #2 DEF Tank Temperature #1 Not Responding The Aftertreatment #2 DCU #1 detects that the DEF tank temperature is not responding properly.
The code is logged.
5798-7
Aftertreatment #1 DEF Dosing Unit Heater Temperature : Not Responding Properly E1427 (1)
Aftertreatment #1 DEF Dosing Unit #1 Temperature Not Responding The Aftertreatment #1 DCU #1 detects that the DEF pump temperature sensor is not responding properly.
The code is logged.
7543-7
Aftertreatment #1 DEF Dosing Unit #2 Heater Temperature : Not Responding Properly E1700 (1)
Aftertreatment #1 DEF Dosing Unit #2 Temperature Not Responding The Aftertreatment #1 DCU #2 detects that the DEF pump temperature sensor is not responding properly.
The code is logged.
7544-7
Aftertreatment 2 Diesel Exhaust Fluid Dosing Unit 1 Heater Temperature : Not Responding Properly E1701 (1)
Aftertreatment #2 DEF Dosing Unit #1 Temperature Not Responding The Aftertreatment #2 DCU #1 detects that the DEF pump temperature sensor is not responding properly.
The code is logged.
7545-7
Aftertreatment 2 Diesel Exhaust Fluid Dosing Unit 2 Heater Temperature : Not Responding Properly E1702 (1)
Aftertreatment #2 DEF Dosing Unit #2 Temperature Not Responding The Aftertreatment #2 DCU #2 detects that the DEF pump temperature sensor is not responding properly.
The code is logged.
7572-7
Aftertreatment #1 DEF Tank Temperature #2 : Not Responding Properly E1741 (1)
Aftertreatment #2 DEF Dosing Unit #1 Temperature Not Responding The Aftertreatment #1 DEF tank Temperature #2 is not responding properly.
The code is logged.
7574-7
Aftertreatment #2 DEF Tank Temperature #2 : Not Responding Properly E1743 (1)
Aftertreatment #2 DEF Dosing Unit #2 Temperature Not Responding The Aftertreatment #2 DEF tank Temperature #2 is not responding properly.
The code is logged.
Table 2
Associated Codes
J1939 Code CDL Code Troubleshooting Procedure
3363-5 3126-5 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
3363-6 3126-6 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
4431-5 3128-5 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
4431-6 3128-6 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
7573-5 5011-5 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
7573-6 5011-6 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
7575-5 5012-5 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)"
7575-6 5012-6 Troubleshooting, "Solenoid Valve - Test (Aftertreatment)" Probable Causes
Codes
Coolant level
Leaks
Shutoff valve
Coolant screen
Connectors and Wiring
Sensor
Diverter valveRecommended Actions
Illustration 1 g06300794
The DEF pumps are on the front side of the Pump Electronic Tank Unit (PETU).
(1) Coolant diverter valve for Aftertreatment #2 DEF pump #2 system (red)
(2) Aftertreatment #2 DEF pump #2 header (red)
(3) Aftertreatment #2 DEF pump #1 header (yellow)
(4) Coolant diverter valve for Aftertreatment #2 DEF pump #1 system (yellow)
(5) Aftertreatment #2 DEF pump #2 (red)
(6) Aftertreatment #2 DEF pump #1 (yellow)
(7) Aftertreatment #1 DEF pump #2 (green)
(8) Aftertreatment #1 DEF pump #1 (blue)
(9) Coolant diverter valve for Aftertreatment #1 DEF pump #2 system (green)
(10) Aftertreatment #1 DEF pump #2 header (green)
(11) Aftertreatment #1 DEF pump #1 header (blue)
(12) Coolant diverter valve for Aftertreatment #1 DEF pump #1 system (blue)
Illustration 2 g06400591
Coolant Screen
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect to Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active or logged codes from Table 2 that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes to see if it resolves the issue before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check the Coolant Level
A. Determine if the engine coolant level is full.
Coolant Level
Result: The coolant level is OK.
Proceed to Test Step 3.
Result: The coolant level is NOT OK.
Repair: Add coolant. Determine the cause of low coolant level. Refer to Troubleshooting, "Coolant Level Is Low" for additional information.
If the problem is not resolved, proceed to Test Step 3.
3. Check for Coolant Leaks
A. Check the entire engine cooling system for signs of coolant leaks.
B. Inspect the coolant supply and return lines to the Pump Electronic Tank Unit (PETU) for leaks or damage that may cause restrictions.
C. Remove the top cover to the PETU assembly to gain access to the coolant lines on the PETU.
D. Inspect the coolant lines and routing inside the PETU assembly for leaks or damage that may cause restriction.
Leaks
Result: No leaks were detected.
Proceed to Test Step 4.
Result: There were leaks or damaged lines detected.
Repair: Repair the leaks or damaged lines and refill the coolant system.
Proceed to Test Step 4.
4. Check the Coolant Shutoff Valve and Coolant Screen
A. Confirm that the coolant shutoff valves to the PETU are open.
Note: The shutoff valve is connected to the coolant screen.
B. Confirm that the coolant screen is installed.
C. Remove the coolant screen a