STARTING MOTOR GP-ELECTRIC 2071525 - Caterpillar

This section is to be used for troubleshooting problems that have symptoms but do not have ACTIVE diagnostic codes. Some engine symptoms are caused by conditions or components other than the electronic control system, such as poor fuel quality or improperly adjusted valves.Before using this section, be sure that you have gathered information about the complaint to adequately describe the symptoms, verify that the complaint is not due to normal engine operation and repair all ACTIVE Diagnostic Codes. Refer to Section 4: Troubleshooting With A Diagnostic Code.The basic philosophy of troubleshooting this engine is to follow the three steps listed below FIRST to diagnose a malfunctioning engine:1. Gather Operator Information. Verify complaint is not due to normal engine operation.2. Perform a visual inspection of the engine. Check fuel and oil level, supply and/or condition. Check for visible wiring and connector problems or damaged components.3. Check and repair all ACTIVE/LOGGED Diagnostic Codes using the troubleshooting procedures in Section 4: Troubleshooting With A Diagnostic Code.If ALL three of these inspections reveal no problems, identify probable causes using the procedure or procedures in this section that best describes the symptoms. Narrow the probable causes given in the procedure by considering operator information, operating conditions, and repair history of the vessel.Operator Information
* What happened, and when?* Under what conditions? Was the engine speed (rpm) high or low?Was the engine under load?* Are there any customer or dealer installed systems that could cause this symptom?* What else occurred?* When did the symptoms begin (and what else happened at that time)?Logged Diagnostic Codes
* Do they correlate to probable causes?* Did they occur at the same time as the symptoms?* Are some codes Logged repeatedly?Other Symptoms
* Are they related to this symptom?* Do they have common probable causes?Finally, test each probable cause using the tests suggested by the procedure. Be sure to check connectors, especially on intermittent problems! Refer to Section 5: P-501: Inspecting Electrical Connectors for details.Operator Questionnaire
Ask the operator to answer the following question before attempting to repair an intermittent problem, or a problem with symptoms but no diagnostic codes. Use this and the response guidelines to these questions on the next page. Questionnaire Response P-301: Engine Will Not Crank
This is NOT an electronic system problem. Refer to the Systems Operation, Testing & Adjusting Manual for additional information on the following tests. Probable root causes:* Battery Cables/Batteries* Starting motor solenoid or circuit problem (in system wiring)* Starting motor/flywheel ring gear* Engine accessory* Hydraulic cylinder lock* Internal engine problem* OEM Neutral Safety Switch Perform the following tests in order:1. Check shutdown switch, battery posts and battery starter cables for loose connections and corrosion. Remove and clean cables and connections if corroded. Load test batteries, Refer to Special Instruction, SEHS9249 Use Of 4C4911 Battery Load Tester. If necessary, charge the batteries. Refer to Special Instruction, SEHS7633 Battery Test Procedure.2. Test starting motor solenoid operation. Check system wiring to starting motor solenoid. Ensure the Starting Motor Mag Solenoid is