CONE, BRG 0778397 - Caterpillar

Table 1
Diagnostic Trouble Codes for the DEF Injector
J1939 Code Description Notes
5394-3 Aftertreatment Diesel Exhaust Fluid Dosing Valve : Voltage Above Normal The Electronic Control Module (ECM) detects a short circuit to battery voltage on the positive side of the Diesel Exhaust Fluid (DEF) injector circuit.
The battery voltage is at least 10 V.
The negative side of the DEF injector circuit does not have an open circuit.
The warning lamp will flash. The engine will be derated.
5394-4 Aftertreatment Diesel Exhaust Fluid Dosing Valve : Voltage Below Normal The ECM detects a short circuit to ground on the positive side of the DEF injector circuit.
The battery voltage is at least 10 V.
The warning lamp will flash. The engine will be derated.
5394-5 Aftertreatment Diesel Exhaust Fluid Dosing Valve : Current Below Normal The ECM detects an open circuit or a short circuit to ground on the circuit for the DEF injector. This fault is only detected when the DEF injector is not being activated.
The battery voltage is at least 10 V.
The warning lamp will flash. The engine will be derated.
5394-6 Aftertreatment Diesel Exhaust Fluid Dosing Valve : Current Above Normal The ECM detects a high current condition or short to battery on the circuit for the DEF injector. This fault is only detected when the DEF injector is being activated.
The warning lamp will flash. The engine will be derated.
Follow the troubleshooting procedure in order to identify the root cause of the fault. DEF Dosing System Accuracy TestThis test is used with the DEF Test Kit to measure the amount of DEF that the SCR dosing system is delivering. The test can also be used to confirm that there is an acceptable spray pattern from the DEF Injector.Note: The DEF injector must be removed from the exhaust system during this test and placed in an appropriate container. Failure to do so could result in issues with the SCR system operation. Refer to Testing and Adjusting, "Aftertreatment SCR System Dosing Test".Navigate to the following screens in order to access the "DEF Dosing System Accuracy Test":
Diagnostics
Diagnostic Tests
Illustration 1 g03725285
Schematic diagram for the DEF injector circuit
Illustration 2 g03725312
View of the pin locations on the J2 ECM connector for the DEF injector
(3) DEF injector return
(18) DEF injector supply
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Check the fuses.
B. Inspect the J2/P2 ECM connector.
C. Inspect the connector for the DEF injector.
D. Perform a 30 N (6.7 lb) pull test on each of the wires in the ECM connector and the DEF injector.
E. Check all of the wiring associated with the DEF injector for abrasions and pinch points.
Damaged wire or connector
Result: A damaged wire or damaged connector was not found.
Proceed to Test Step 2.
Result: A damaged wire or damaged connector was found.
Repair: Repair the damaged wire or the damaged connector.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
2. Check for Active Diagnostic Codes
A. Establish communication between the electronic service tool and the ECM. If necessary, refer to Troubleshooting,