PIN 4Z8393 - Caterpillar

Note: Refer to Troubleshooting, "Component Location" in this manual for the proper location of the components listed in this procedure.Electrical Checkouts on the Caterpillar Electronic Technician (ET)
Table 2
Component Electrical Checkout
Engine retarder solenoid Engine Retarder Solenoid Override - initiate an engine retarder solenoid override through Cat ET in order to activate the engine retarder solenoid. Review active diagnostic codes to determine what code is present.
Engine Intake Valve Actuation System Oil Pressure Control Valve Start the engine. Use the "Intake Valve Actuation System Test" in diagnostic tests in Cat ET to activate the Engine Intake Valve Actuation System Oil Pressure Control Valve. Once the test is complete, review the active diagnostic codes to determine the code that is present.
Pilot control solenoid ARD ignition test - initiate an ARD ignition test through Cat ET in order to activate the pilot control valve solenoid. If the fault becomes active, the test will abort. Review active diagnostic codes to determine what code is present.
Main control solenoid ARD ignition test - initiate an ARD ignition test through Cat ET in order to activate the main control valve solenoid. If the fault becomes active, the test will abort. Review active diagnostic codes to determine what code is present.
Solenoid valve for NRS valve actuator EGR system test - initiate the EGR system test through Cat ET in order to activate the control solenoid for the NRS valve. If the fault becomes active, the test will abort. Review active diagnostic codes to determine what code is present.
Exhaust balance valve solenoid Use the "Engine exhaust manifold bank #1 flow balance valve solenoid override" in the override parameters section in Cat ET to activate the exhaust balance valve solenoid. Review active diagnostic codes to determine what code is present.
Fuel diverter valve Use the "ARD fuel flow diverter actuator override" in the override parameters section in Cat ET to activate the fuel diverter valve on the ARD fuel pump. Review active diagnostic codes to determine what code is present.
Relay for ARD fuel pump Use the "Aftertreatment fuel pump relay override" in the override parameters section in Cat ET to activate the ARD fuel pump. Review active diagnostic codes to determine what code is present.
Relay for ARD heater ARD Nozzle heater circuit test - Initiate the ARD Nozzle heater circuit test through Cat ET in order to activate the ARD heater relay. Review active diagnostic codes to determine if a code is present.
Engine Starter Motor Relay Attempt to start the engine. Once the ECM attempts to energize the relay, the code will become active.
Refer to the machine-specific schematic for the "Engine Starter Motor Relay" wiring circuit.
Illustration 1 g03646099
Refer to the machine-specific schematic for the "Engine Starter Motor Relay" wiring circuit.
Not all connectors are shown, refer to the appropriate schematic
Table 3
Troubleshooting Test Steps Values Results
1. Determine the Diagnostic Code
A. Establish communication between Cat® Electronic Technician (ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting