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Override Parameters
The override parameters screen has multiple overrides. The parameters control various functions on the engine and CEM. These functions and features allow the technician to troubleshoot different engine systems.Cat ET Location
Connect to Cat ET.
Select the appropriate Electronic Control Module (ECM)
Select the Diagnostics tab.
Select the Diagnostic Tests tab.
Select the Override Parameter tab.Override Parameters Listed in the Engine ECM Menu
DPF Differential Pressure Line Override
This override when Activated, will ignore any fault code from the DPF Delta P sensor. This override will be used when using the DPF crack detection procedure.DEF Coolant Diverter Valve Solenoid Override
The override is used to check the solenoid and diverter valve harness electrically. This override will open the coolant diverter valve which allows coolant to flow through the PETU assembly. This test can be used to verify that the coolant diverter valve is working properly.DEF Dosing Injector Override
This override allows the user to test the electrical circuit for the DEF injector. The override commands the DEF injector to open. This override only operates when there is no engine speed.Engine Exhaust Manifold Bank #1 Flow Balance Valve Solenoid Override
The engine ECM will energize the exhaust balance valve solenoid to on or off. This override will be used when troubleshooting the exhaust balance valve.Engine Fan Bypass
This override is used to turn ON the engine fan. The override can be used to test the engine fan operation. The engine fan speed is entered as a percent of full speed, this percent allows the user to operate the fan at different speeds.Ether injection Override
This override is used to activate the ether injection solenoid circuit to ensure that the circuit is working properly. The ether canister must be removed during testing of the ether solenoid circuit.System Troubleshooting Settings
The "System Troubleshooting Settings" screen will allow overrides to be enabled.Cat ET Location
Connect to Cat ET and select the appropriate ECM.
Select the Diagnostics tab.
Select the Diagnostic Tests tab.
Select "System Troubleshooting Settings".System Troubleshooting Settings Listed in the Engine ECM Menu
Injector Disable Override
This override will allow the user to disable the injectors from activating when performing certain troubleshooting procedures.Active Diagnostic Codes
The purpose of this screen is to show all the active diagnostic codes.Cat ET Location
Connect to Cat ET.
Select the appropriate Electronic Control Module (ECM)
Select the Diagnostics tab.
Select the Active Diagnostic Codes tab.Tab Functions At Bottom of Screen
Reset
This tab will clear specific codes when highlighted.Reset All
This tab will reset all the active codes.Logged Diagnostic Codes
The purpose of this screen is to show all the logged diagnostic codes.Cat ET Location
Connect to Cat ET.
Select the appropriate Electronic Control Module (ECM)
Select the Diagnostics tab.
Select the Logged Diagnostic Codes tab.Tab Functions At Bottom of Screen
Clear
This tab will clear specific codes when highlighted.Clear All
This tab will clear all logged diagnostic codes.Active Event Codes
The purpose of this screen is to show all the active event codes.Cat ET Location
Connect to Cat ET.
Select the appropriate Electronic Control Module (ECM)
Select the Diagnostics tab.
Select the Events tab.
Select the Active Events tab.Tab Function At Bottom of Screen
Reset
This tab will clear specific codes when highlighted.Reset All
This tab will reset all the active codes. Some of the event codes can "latch" to active status. Repairing the system cannot "unlatch" the event codes and the event codes must be reset with Cat ET.Logged Event Codes
The purpose of this screen is to show all the logged event codes.Cat ET Location
Connect to Cat ET.
Select the appropriate Electronic Control Module (ECM)
Select the Diagnostics tab.
Select the Events tab.
Select the Logged Events tab.Tab Functions At Bottom of Screen
Clear
This tab will clear specific codes when highlighted.Clear All
This tab will clear all logged diagnostic codes.Diagnostic Tests
Cat ET diagnostic tests are listed below.Cat ET Location
Connect to Cat ET and select the appropriate ECM.
Select the Diagnostics tab.
Select the Diagnostic Tests tab.Diagnostic Tests Listed in the Engine ECM Menu
Aftertreatment Diesel Exhaust Fluid Tank Heater Test
This test opens the coolant diverter valve, all