13121-93101 Suzuki Gasket, Inlet Case

Table 1
J1939 Code and Description CDL Code and Description Comments
3361-8
Aftertreatment #1 DEF Dosing Unit : Abnormal Frequency, Pulse Width, or Period 3102-8
Aftertreatment #1 DEF Dosing Pump : Abnormal Frequency, Pulse Width, or Period The Aftertreatment #1 Diesel Exhaust Fluid Controller Unit (DCU) #1 detects an abnormal pump motor speed signal.
The code is logged.
4337-8
Aftertreatment #1 DEF Doser #1 Temperature : Abnormal Frequency, Pulse Width, or Period 3096-8
Aftertreatment #1 DEF Temperature #1 Sensor : Abnormal Frequency, Pulse Width, or Period The Aftertreatment #1 DCU #1 detects an abnormal temperature signal from the pump.
The code is logged.
4374-8
Aftertreatment #1 DEF Pump #1 Motor Speed : Abnormal Frequency, Pulse Width, or Period 3118-8
Aftertreatment #1 DEF Pump Motor Speed Sensor : Abnormal Frequency, Pulse Width, or Period The Aftertreatment #1 DCU #1 detects an abnormal pump motor speed signal.
The code is logged.
4376-7
Aftertreatment #1 DEF Return Valve : Not Responding Properly 3862-7
Aftertreatment #1 Diesel Exhaust Fluid Return Valve Solenoid : Not Responding Properly The Aftertreatment #1 DCU #1 detects that the return valve is not responding properly.
The code is logged.
7457-8
Aftertreatment #1 DEF Dosing Unit #2 : Abnormal Frequency, Pulse Width, or Period 5032-8
Aftertreatment #1 Diesel Exhaust Fluid Pump #2 : Abnormal Frequency, Pulse Width, or Period The Aftertreatment #1 DCU #2 detects an abnormal pump motor speed signal.
The code is logged.
7460-8
Aftertreatment #1 DEF Doser #2 Temperature : Abnormal Frequency, Pulse Width, or Period 3097-8
Aftertreatment #1 DEF Temperature #2 Sensor : Abnormal Frequency, Pulse Width, or Period The Aftertreatment #1 DCU #2 detects an abnormal temperature signal from the pump.
The code is logged.
7536-7
Aftertreatment #1 DEF Dosing Unit #2 Diverter Valve : Not Responding Properly 5008-7
Aftertreatment #1 Diesel Exhaust Fluid Return Valve #2 Solenoid : Not Responding Properly The Aftertreatment #1 DCU #2 detects that the return valve is not responding properly.
The code is logged.
Illustration 1 g06022979
The DEF pumps are on the front side of the Pump Electronic Tank Unit (PETU).
(1) DEF pump 1
(2) DEF pump 2Probable Causes
Codes
Connectors and wiring
LeaksRecommended Actions
Table 2
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 code is active or logged.
Proceed to Test Step 2.
2. Inspect the Electrical Connectors and the Wiring
A. Turn the keyswitch to the OFF position for 2 minutes. The keyswitch must be OFF for 2 minutes to allow the Diesel Exhaust Fluid (DEF) pump to purge, reset the code, and reset the Diesel Exhaust Fluid Controller Unit (DCU).
B. Disconnect the affected DEF pump electrical connector.
C. Inspect the connector terminals for DEF contamination or corrosion.
Connector and Wiring
Result: The connectors and/or wiring appear to be OK.
Proceed to Test Step 3.
Result: There is a problem with the connectors and/or wiring.
Repair: Replace the Pump Electronic Tank Unit (PETU) connector or wiring. Ensure that all the seals are properly in place and ensure that the connectors are coupled.
Proceed to Test Step 3.
3. Replace the Affected DEF Pump
A. Turn the keyswitch to the OFF position for 2 minutes. The keyswitch must be OFF for 2 minutes to allow the DEF pump to purge, reset the code, and reset the DCU.
B. Replace the appropriate DEF pump. Refer to the Disassembly and Assembly manual for additional information.
C. Turn the keyswitch to the ON position. Do not start the engine.
D. Connect Cat ET.
E. Select the "Selective Catalyst Reduction System".
F. Perform the following diagnostic test to pressurize the system:
-"Aftertreatment Dosing System Functional Test"
G. Visually inspect all DEF lines from the tank to the DEF injectors. Look for pinched, damaged, or disconnected lines.
H. Turn the keyswitch to the OFF position.
Leaks
Result: The lines are not leaking and the test was successful.
Return to service.
Result: The test was not successful.
Repair: Perform the following procedure:
1. Repair or replace the damaged components.
2. Connect Cat ET.
3. Select the "Selective Catalyst Reduction System".
4. Perform the following diagnostic test to pressurize the system:
-"Aftertreatment Dosing System Functional Test"
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).