BUSHING 2368561 - Caterpillar

System Operation Description:Electrical power is supplied to the control module for the Electronic Ignition System (EIS). Electrical power is also supplied to these optional components:
Status Control Module (SCM)
PWM Converter
Power the sensors.
Energize the ignition coils.The Electronic Ignition System (EIS) does not diagnose the power supply. Therefore, the control module will not generate a diagnostic code if the power supply is faulty.The SCM will generate a 06 dIAG code if the power supply to the SCM is low or unstable. Refer to Systems Operation, SENR6538 for the procedure for troubleshooting this code.The EIS will generate a 168-02 System Voltage intermittent/erratic if there is a problem with the power supply. The code can be caused by any of these conditions:
The EIS control module has detected engine rpm during the normal powerup sequence. This will occur if the engine is running and the electrical power is cycled.
The power supply to the EIS control module is intermittent.
There is a noisy component in the secondary ignition system.The ECM will send a shutdown command to the EIS control module if a 168-02 code is generated. The ignition and the fuel will be shut down.Grounding PracticesProper grounding is necessary for optimum engine performance and reliability. Improper grounding will result in uncontrolled electrical circuit paths and in unreliable electrical circuit paths. Refer to the engine's Operation and Maintenance Manual for additional information on proper grounding practices.Requirements for the Power SupplyThe 24 VDC power supply for the engine can be provided by a battery or by an electrical power supply. The power supply must be capable of providing sufficient current and sufficient voltage in order to start the engine.The batteries and the battery cables must be the correct size in order to minimize voltage drops. This is particularly important during cranking. The supply voltage at the EIS control module must remain above 18 VDC during cranking. Otherwise, the engine may not start. Random diagnostic codes may be generated by the control module.The control module requires an instantaneous current flow of at least 16 amperes at a minimum voltage of 18 VDC in order to power up. The EIS control module requires a continuous current flow of at least 3 amperes at a minimum voltage of 18 VDC for continuous operation.The wiring from the power supply to the modules must provide a maximum voltage drop of 1.0 VDC.
Illustration 1 g01174238
Schematic diagram of the electrical power supplyThe engine is equipped with a 70 pin connector and EMCP II.
Illustration 2 g01164662
Schematic diagram of the electrical power supplyThe engine is equipped with a remote control panel.Test Step 1. Inspect the Electrical Connectors
Set the engine control to the OFF/RESET mode. Remove the electrical power from the engine.Note: For the following steps, refer to Troubleshooting, "Inspecting Electrical Connectors".
Thoroughly inspect each of the following connectors:
EIS connectors on the control module
Connectors for the 24 VDC power supply
Connectors for the engine control
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the electrical power supply.
Check the harness and wiring for abrasion and