CYLINDER GP-STICK 4550419 - Caterpillar

Table 1
Diagnostic Codes    
J1939 Code and Description     Conditions which Generate this Code     System Response    
5435-5
Aftertreatment #1 Catalyst Reagent Pump Heater Current Below Normal     The Electronic Control Module (ECM) detects an open in the circuit for the heater.     The code is logged.    
5435-6
Aftertreatment #1 Catalyst Reagent Pump Heater Current Above Normal     The ECM detects a short in the circuit for the heater.     The code is logged.    
Illustration 1 g03321443
DEF pump heater circuitIn order to aid troubleshooting, overrides are provided via Cat ET.Overrides allow the technician to turn the circuit on and off at will.Refer to table 2 for the appropriate override for the code.
Table 2
Component     Override    
5435-5
Aftertreatment #1 Catalyst Reagent Pump Heater Current Below Normal     Aftertreatment #1 SCR Catalyst Reagent Pump Heater Override    
5435-6
Aftertreatment #1 Catalyst Reagent Pump Heater Current Above Normal    Test Step 1. Determine the Diagnostic Code
Establish communication between Cat ET and the ECM. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
Download the "Warranty Report" from the ECM before performing any troubleshooting or clearing diagnostic trouble codes.Wait at least 30 seconds in order for the diagnostic codes to become active.
Look for these active codes or logged codes:
-5
-6Results:
A -5 diagnostic code is active. - Proceed to Test Step 2.
A -6 diagnostic code is active. - Proceed to Test Step 3. Test Step 2. Check the Wiring for an Open Circuit
Verify that the harness connectors are free of debris, free of corrosion and securely connected.
Disconnect the harness from the heater.
Connect a jumper wire between the terminals of the harness connector for the suspect heater. The heater is replaced with a short circuit.
Clear the -5 code.
Activate the override for the suspect circuit. Refer to table 2 for the appropriate override for the code.Results:
A -5 code became active during the override. - The ECM did not detect the jumper wire. There is an open circuit in the wiring between the heater and the ECM connector. There may be a problem with a connector.Repair: Repair the appropriate harness wiring or replace the appropriate harness.Verify that the problem is resolved.STOP
A -6 code became active during the override. The ECM detected the jumper wire. There is a problem with the solenoid. - Repair: Replace the heater.Verify that the problem is resolved.STOPTest Step 3. Check the Wiring for a Short Circuit
Verify that the harness connectors are free of debris, free of corrosion and securely connected.
Disconnect the harness from the heater.
Clear the -6 code.
Activate the override for the suspect circuit. Refer to table 2 for the appropriate override for the code.Results:
A -6 code became active during the override. - The ECM did not detect the open circuit. There is a short circuit in the wiring between the heater and the ECM connector. There may be a problem with a connector.Repair: Repair the appropriate harness wiring or replace the appropriate harness. Verify that the problem is resolved.STOP
A -5 code became active during the override. - The ECM detected the open circuit.