0335061 JOHNSON PLATE, Frame, rear, 20

Table 1
J1939 Code and Description CDL Code and Description Comments
5394-7
Aftertreatment DEF Dosing Valve : Not Responding Properly 3821-7
Aftertreatment #1 DEF Dosing Valve Actuator #1 : Not Responding Properly The Aftertreatment #1 Diesel Exhaust Fluid (DEF) injector #1 is not functioning properly.
The code is logged.
5394-14
Aftertreatment DEF Dosing Valve : Special Instruction 3821-14
Aftertreatment #1 DEF Dosing Valve Actuator #1 : Special Instruction The Aftertreatment #1 Diesel Exhaust Fluid (DEF) injector #1 is not functioning properly.
The code is logged.
5974-7
Aftertreatment #2 DEF Dosing Valve #1 : Not Responding Properly 5020-7
Aftertreatment #2 DEF Dosing Valve Actuator #1 : Not Responding Properly The Aftertreatment #2 Diesel Exhaust Fluid (DEF) injector #1 is not functioning properly.
The code is logged.
5974-14
Aftertreatment #2 DEF Dosing Valve #1 : Special Instruction 5020-14
Aftertreatment #2 DEF Dosing Valve Actuator #1 : Special Instruction The Aftertreatment #2 Diesel Exhaust Fluid (DEF) injector #1 is not functioning properly.
The code is logged.
6324-7
Aftertreatment #1 DEF Dosing Valve #2 : Not Responding Properly 5017-7
Aftertreatment #1 DEF Dosing Valve Actuator #2 : Not Responding Properly The Aftertreatment #1 DEF injector #2 is not functioning properly.
The code is logged.
6324-14
Aftertreatment #1 DEF Dosing Valve #2 : Special Instruction 5017-14
Aftertreatment #1 DEF Dosing Valve Actuator #2 : Special Instruction The Aftertreatment #1 DEF injector #2 is not functioning properly.
The code is logged.
6325-7
Aftertreatment #2 DEF Dosing Valve #2 : Not Responding Properly 5021-7
Aftertreatment #2 Diesel Exhaust Fluid Dosing Valve Actuator #2 : Not Responding Properly The Aftertreatment #2 DEF injector #2 is not functioning properly.
The code is logged.
6325-14
Aftertreatment #2 DEF Dosing Valve #2 : Special Instruction 5021-14
Aftertreatment #2 DEF Dosing Valve Actuator #2 : Not Responding Properly The Aftertreatment #2 DEF injector #2 is not functioning properly.
The code is logged.
7488-7
Aftertreatment #1 DEF Dosing Valve #3 : Not Responding Properly 5018-7
Aftertreatment #1 DEF Dosing Valve Actuator #3 : Not Responding Properly The Aftertreatment #1 DEF injector #3 is not functioning properly.
The code is logged.
7488-14
Aftertreatment #1 DEF Dosing Valve #3 : Special Instruction 5018-14
Aftertreatment #1 DEF Dosing Valve Actuator #3 : Special Instruction The Aftertreatment #1 DEF injector #3 is not functioning properly.
The code is logged.
7489-7
Aftertreatment #2 DEF Dosing Valve #3 : Not Responding Properly 5022-7
Aftertreatment #2 DEF Dosing Valve Actuator #3 : Not Responding Properly The Aftertreatment #2 DEF injector #3 is not functioning properly.
The code is logged.
7489-14
Aftertreatment #2 DEF Dosing Unit #3 : Special Instruction 5022-14
Aftertreatment #2 DEF Dosing Valve Actuator #3 : Special Instruction The Aftertreatment #2 DEF injector #3 is not functioning properly.
The code is logged.
7546-7
Aftertreatment #1 DEF Dosing Valve #4 : Not Responding Properly 5019-7
Aftertreatment #1 DEF Dosing Valve Actuator #4 : Not Responding Properly The Aftertreatment #1 DEF injector #4 is not functioning properly.
The code is logged.
7546-14
Aftertreatment #1 DEF Dosing Valve #4 : Special Instruction 5019-14
Aftertreatment #1 DEF Dosing Valve Actuator #4 : Special Instruction The Aftertreatment #1 DEF injector #4 is not functioning properly.
The code is logged.
7547-7
Aftertreatment #2 DEF Dosing Valve #4 : Not Responding Properly 5023-7
Aftertreatment #2 DEF Dosing Valve Actuator #4 : Not Responding Properly The Aftertreatment #2 DEF injector #4 is not functioning properly.
The code is logged.
7547-14
Aftertreatment #2 DEF Dosing Valve #4 : Special Instruction 5023-14
Aftertreatment #2 DEF Dosing Valve Actuator #4 : Special Instruction The Aftertreatment #2 DEF injector #4 is not functioning properly.
The code is logged.
Table 2
Required Tools Qty
372-5260 Test Lead Tool Group 1 Probable Causes
Codes
DEF lines
DEF injector
Wiring harness
DEF quality
RestrictionsRecommended Actions
Reference: Refer to Troubleshooting, System Overview (Aftertreatment Identification) for locating aftertreatment components if necessary.
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 the associated code before continuing with this test.
Result: A -7 code is active or logged.
Proceed to Test Step 2.
Result: A -14 code is active or logged.
Repair: Replace the failed DEF injector.
Proceed to Test Step 10.
Illustration 1 g06216453
The DEF injectors are on the inlet of the Clean Emissions Module (CEM). There are injectors on both inlets of the dual CEM applications. This view above is for the 793F and 797F Off-Highway Trucks.
(1) DEF injector 2 (Aftertreatment 1 DEF pump 1)
(2) DEF injector 3 (Aftertreatment 1 DEF pump 1)
(3) DEF injector 1 (Aftertreatment 1 DEF pump 2)
(4) DEF injector 4 (Aftertreatment 1 DEF pump 2)
(5) DEF injector 2 (Aftertreatment 2 DEF pump 1)
(6) DEF injector 3 (Aftertreatment 2 DEF pump 1)
(7) DEF injector 1 (Aftertreatment 2 DEF pump 2)
(8) DEF injector 4 (Aftertreatment 2 DEF pump 2)
Illustration 2 g06426191
The DEF injectors are on the inlet of the Clean Emissions Module (CEM). There are injectors on both inlets of the dual CEM applications. This view above is for the 794 AC, 796, and 798 Off-Highway Trucks.
(1) DEF injector 2 (Aftertreatment 1 DEF pump 1)
(2) DEF injector 3 (Aftertreatment 1 DEF pump 1)
(3) DEF injector 1 (Aftertreatment 1 DEF pump 2)
(4) DEF injector 4 (Aftertreatment 1 DEF pump 2)
(5) DEF injector 2 (Aftertreatment 2 DEF pump 1)
(6) DEF injector 3 (Aftertreatment 2 DEF pump 1)
(7) DEF injector 1 (Aftertreatment 2 DEF pump 2)
(8) DEF injector 4 (Aftertreatment 2 DEF pump 2)
Table 4
Troubleshooting Test Ste