System Operation Description:
The ARD nozzles can become plugged with carbon or with debris. The Engine Control Module (ECM) periodically tests the condition of the nozzles. The engine is equipped with a system that cleans the nozzles. A restriction in a filter connector for the ARD combustion head can also set this code.
Electric Heating Element - The ARD combustion head contains an electric heating element. The heating element operates periodically in order to clean the nozzles.
Diagnostic Trouble Codes
Table 1 lists the diagnostic trouble code for the cleaning system for the nozzle.
Note: The following code may not be applicable for certain applications.
Diagnostic Trouble Codes | |||
---|---|---|---|
CDL Code | J1939 Code | Code Description
(code descriptions may vary) |
Comments |
E1070 (1) | 3556-7 | Aftertreatment Fuel Injector #1 not responding | The nozzle is plugged with debris or there is an electrical problem with the circuit for the electric heating element. |
Follow the troubleshooting procedure in order to identify the root cause of the problem. |
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Illustration 1 | g03780837 |
CEM (typical) (1) Relay for the ARD nozzle heater (2) ARD combustion head |
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Illustration 2 | g01946714 |
ARD combustion head (3) ARD spark plug (4) ARD nozzle (5) ARD fork bracket (6) ARD pilot filter connector (7) ARD combustion head (8) ARD main filter connector |
System Operation for the Electric Heating Element
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Illustration 3 | g01977215 |
Measuring the current flow (9) Metal part of the electrical connector (10) Wire (11) Clamp-on ammeter |
Overrides on the AVSpare Electronic Technician (ET) for the Heated Nozzle
ARD Fuel Nozzle Heat Cycle - This override activates the output for the heated nozzle in order to clean the nozzle. The output remains activated for approximately one hour. The engine coolant temperature must be greater than
Select the following menus in order to activate the overrides:
- "Diagnostics"
- "Diagnostics Tests"
- "Override Parameters"
- "Aftertreatment #1 Fuel Injector #1 Heater Override"
Troubleshooting Test Steps | Values | Results |
---|---|---|
1. Check for Diagnostic Codes A. Establish communication between Cat® Electronic Technician (ET) and the ECM . Refer to Troubleshooting, "Electronic Service Tools", if necessary. B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Determine if a diagnostic trouble code is present. |
Diagnostic Code |
Result: A E1070 (1) or 3556-7 diagnostic code is present. Proceed to Test Step 2. |
2. Check the Current Flow Through the Heater A. Start the engine. Check the current flow through the heater. Refer to Systems Operation/Testing and Adjusting, "ARD Nozzle Heater (Current) - Test" for the correct procedure. |
Amperage Between 7.0 A and 14 A for a 12 V System or Between 3.5 A and 7 A for a 24 V System |
Result: The current flow is between 7.0 A and 14 A for a 12 V system. Or, the current flow is between 3.5 A and 7 A for a 24 V system. The current flow is OK. Proceed to Test Step 3. Result: The current flow is not between 7.0 A and 14 A for a 12 V system. Or, the current flow is not between 3.5 A and 7 A for a 24 V system. There may be a problem with the current flow through the heater. Repair: Check the current flow through the heater again. The current flow is not between 7.0 A and 14 A for a 12 V system. Or, the current flow is not between 3.5 A and 7 A for a 24 V system. Proceed to Troubleshooting, "ARD Nozzle Heater - Test" for additional information. |
Troubleshooting Test Steps | Values | Results |
3. Replace the ARD Combustion Head A. Replace the ARD combustion head. Refer to Special Instruction, REHS4824, "Replacement of the ARD Combustion Head on AVSpare Products with Clean Emissions Modules". B. Perform the "ARD Ignition Test" in Cat ET and verify that there are no fuel leaks. Refer to System Operation/Testing and Adjusting, "ARD Fuel System - Test". The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET. C. Use a clamp-on ammeter to verify that the current flow through the new heating element is above the expected amount for the system voltage. Refer to Systems Operation/Testing and Adjusting, "ARD Nozzle Heater - Test" for additional information. |
Test Passed |
Result: The ARD combustion head was replaced. Return the unit to service. |
Test Step 1.
Results:
- The procedure corrected the issue. - STOP
- The procedure did not correct the issue. -
Repair: Contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
STOP