3N4-61343-0 Nissan BOLT, 8 - 25

Recommended Actions
Theft Deterrent
If the display screen on Messenger indicates that the theft deterrent is enabled, the theft deterrent passwords must be entered before the engine will start. Ensure that the theft deterrent (if equipped) is not active. Turn the keyswitch to ON. Observe the display screen on Messenger.Diagnostic Codes
Check for active diagnostic codes.
Connect Cat ET to the data link connector.
Check for active diagnostic codes. Certain diagnostic codes will prevent the engine from starting.
Troubleshoot any diagnostic codes that are present.Flash File for the Engine Control Module (ECM)
Check that the latest version of the ECM flash file has been installed. Verify that the flash file that is installed matches the application. A new ECM is not programmed at the factory. The engine will not start until the ECM flash file is installed for the specific application. Also, the ECM will not communicate until the flash file has been installed. Use "WinFlash" to program a new ECM.Air Inlet Shutoff (If Equipped)
Check the air inlet shutoff system. If the engine was shutdown due to the air inlet shutoff system, the air inlet shutoff needs to be manually reset.Engine Speed/timing Signal
Check the engine speed/timing signal. Observe the engine rpm on Cat ET while the engine is being cranked. This observation may require Cat ET to be powered directly by the vehicle batteries. Or this observation may require Cat ET to be powered directly by a separate power source. Use the 167-9225 Harness (SERVICE TOOL ADAPTER).If Cat ET displays 0 rpm and the engine is being cranked, there is a problem in the circuit for the primary engine speed/timing sensor. Or there is a problem with the secondary engine speed/timing sensor. Refer to Troubleshooting, "Engine Speed/Timing Sensor Circuit - Test".Note: Upon initial cranking, the status for engine speed may indicate that the engine speed signal is abnormal. This message will be replaced with an engine speed once the ECM is able to calculate a speed from the signal.If an engine rpm is present, check the sensor installation. If the sensor is not properly installed, the sensor may read engine speed but the sensor may not be able to sense the tooth pattern. The ability to detect the tooth pattern is necessary to determine the cylinder position. Engine rpm is present when the engine rpm is 50 rpm or more.Ensure that the timing reference gear is installed correctly. The engine will not start if the gear was installed backwards. Check for proper orientation between the crankshaft and camshaft drive gears. Correct the orientation and/or replace the drive gear, if necessary. Refer to the Disassembly and Assembly manual for the appropriate procedures.Keyswitch
Use Cat ET to check the status of the keyswitch.
Access the status for "Ignition Key Switch" in Cat ET.
Slowly cycle the keyswitch on and off while the status of the keyswitch is being monitored. The status should indicate the state of the switch.If the ECM will not communicate and the keyswitch is in the ON position, refer to "Aftermarket Engine Protection Devices".Note: If the engine shutdown output is used, the status for the keyswitch may indicate that the switch is on. This indication may be on even though the keyswitch is in the OFF position.Communications Between the ECM and Cat ET
Check the communications between the ECM and Cat ET.
Ensure that the keyswitch is in the ON position. Attempt to access one of the status screens on Cat ET.If Cat ET indicates that the ECM will not communicate, go to "Aftermarket Engine Protection Devices". If the ECM communicates, go to "Power to the ECM".Aftermarket Engine Protection Devices
Check aftermarket engine protection devices. These devices usually interrupt power to the ECM. This interruption will prevent communications between the ECM and Cat ET.
Check for the correct installation of the aftermarket engine protection device.
Check for the correct operation of the aftermarket engine protection device.
Verify that the ECM is receiving the correct battery voltage.Power to the ECM
Check the power supply connections for the ECM and the ground connections for the ECM.
Verify that the ECM is receiving battery voltage with the keyswitch in the ON position. Refer to Troubleshooting, "Ignition Key Switch Circuit and Battery Supply Circuit - Test".
Check for proper operation of the ECM.Before replacing the ECM, try to install a new flash file into the existing ECM. Refer to Troubleshooting, "Flash Programming".If the ECM is suspected of being the problem, temporarily connect a test ECM. This temporary connection will prove whether the problem is with the suspect ECM.Electrical Connections to the Electronic Unit Injectors
Check the electrical connections to the electronic unit injectors. Ensure that the valve cover connectors are fully connected. Ensure that the valve cover connectors are free of corrosion and of moisture.Fuel Supply
Check the fuel supply.
Monitor the exhaust for smoke while the engine is being cranked.Note: If no smoke is present, there may be a problem with the fuel quality or with the fuel supply.
Check the fuel quality. Refer to Systems Operation/Testing and Adjusting, "Fuel Quality - Test". Also refer to Truck Application and Installation Guide, LEBT5109.
Check the operation of the low-pressure fuel system. Refer to Systems Operation, "Fuel System".
Ensure that the fuel system has been primed. Refer to Systems Operation, "Fuel System".
Check for a restriction in the fuel supply lines.
Check the fuel filters.
If the temperature is below 0 °C (32 °F), check for solidified fuel (wax).Unit Injectors
Perform the "Injector Solenoid Test" on Cat ET in order to determine if all of the injector solenoids are being energized by the ECM.
Perform the "Cylinder Cutout Test" on Cat ET in order to check the performance of each cylinder. Refer to the Troubleshooting, Injector Solenoid Circuit - Test.
Verify that the injection system is delivering the correct pressure. Refer to the Troubleshooting, Injection Actuation Pressure - Test.Note: Refer to Special Instruction, REHS3819, Procedure for Troubleshooting and Cleaning the Oil Rail System for the Hydraulic Electronic Unit Injector. Verify that the repair eliminates the problem.Combustion Problem
Check for mechanical problems that may affect combustion of the fuel.Cold Weather and Problems with the Starting Aids
The engine may have an air inlet heater and