Electronic Modular Control Panel II (EMCP II) For PEEC Engines Caterpillar


Engaged Starting Motor - Troubleshoot

Usage:

3412 2WJ



Illustration 1g00597871

System Schematic For Starting Motor Relay (SMR)

The starting motor remains engaged or the starting motor continues to run after the engine has started.

  1. Check setpoints.

    This step checks setpoints P11 (crank terminate speed), P17 (total cycle crank time) and P18 (cycle crank time).

    1. View the setpoints and make a note of the setpoints P11, P17 and P18. See Systems Operation, "Engine/Generator Setpoint Viewing OP2".

    1. Compare the setpoints that are viewed with the setpoints that are specified for the particular generator set. The factory default value for P11 is 400 rpm. The factory default value for P17 is 90 seconds. The factory default value for P18 is 10 seconds.

      Note: Engines that are equipped with prelube pumps may require cycle crank times of 30 seconds or more.

      Expected Result: The setpoint value that is viewed and the setpoint value that is specified should agree.

      Results:

      • OK - Proceed to 2.

      • Not OK - The viewed setpoint does not agree with the specified setpoint. Reprogram setpoints P11, P17 and P18. See Systems Operation, "Engine/Generator Programming OP5". Proceed to 2.

  1. Check the procedure for starting the engine.

    The remaining steps of this procedure require checks to be made during a simulated engine starting. The fuel delivery system is disabled.

    1. Disable the fuel shutoff solenoid or the PEEC electronic control module in order to prevent the engine from starting but not from cranking.

    1. Prepare to manually stop the engine from cranking. If necessary, turn the battery disconnect switch to the OFF position.

    1. Turn the ECS to START and allow the engine to crank.

    1. Turn the ECS to OFF/RESET.

      Expected Result: The engine should stop cranking.

      Results:

      • OK - Proceed to 6.

      • Not OK - Engine continues to crank. Proceed to 3.

  1. Check the procedure for starting the engine.

    The conditions of 2 remain. The fuel delivery is disabled and the engine is cranking.

    1. While the engine is still cranking from the preceding step, push the emergency stop push button.

      Expected Result: The engine should stop cranking.

      Results:

      • OK - Check the wire on RM-18 of the relay module for a short to "B+". If a short is not found, replace the relay module. See Testing And Adjusting, "Relay Module - Replace". STOP.

      • Not OK - Engine continues to crank. Proceed to 4.

  1. Check the procedure for starting the engine.

    The conditions of 3 remain. The fuel delivery is disabled and the engine is cranking.

    1. Stop the engine. Turn the battery disconnect switch to the OFF position.

    1. Remove all wires from terminals TS1-25 in the generator housing. For dual starting motors, remove all the wires from terminal TS1-26.

    1. Turn the ECS to the START position and attempt to crank the engine.

      Expected Result: The engine should not crank.

      Results:

      • OK - The engine does not crank. Therefore, the starting motor magnetic switch (SMMS) or related wiring is faulty. Troubleshoot the SMMS and the related wiring. See Testing And Adjusting, "Schematics & Wiring Diagram". STOP.

      • Not OK - Engine continues to crank. Proceed to 5.

  1. Check the procedure for starting the engine.

    The conditions of 4 remain. The fuel delivery is disabled and the engine is cranking.

    1. Stop the engine. Turn the battery disconnect switch to the OFF position.

    1. Disconnect the B+ wire on the pinion solenoid of the starting motor.

    1. Turn the ECS to START and attempt to crank the engine.

      Expected Result: The engine should not crank.

      Results:

      • OK - The engine does not crank. Therefore, a wire in the engine harness is shorted to the +battery. Troubleshoot the wiring. See the "Generator Set Wiring Diagram" in Testing And Adjusting, "Schematics And Wiring Diagrams". STOP.

      • Not OK - Engine continues to crank. Therefore, the starting motor is faulty. Troubleshoot the starting motor. Refer to the Service Manual, "Starting Motor" and/or the Engine Service Manuals. STOP.

  1. Check the cycling for the starting motor.

    This step continues troubleshooting from 2. The conditions of 2 remain. The fuel delivery is disabled.

    Turn the ECS to the START position.

    1. Expected Result: The starting motor should cycle on and off according to setpoint P18 (cycle crank time).

      Results:

      • OK - If the starting motor cycles correctly, the problem is not present. STOP.

      • Not OK - If the starting motor remains ON and does not stop, the starting motor is faulty. Troubleshoot the starting motor. Refer to the Starting Motor and/or Engine Service Manuals. STOP.

Caterpillar Information System:

3114, 3116 and 3126 Industrial, Marine and Generator Set Engines Flywheel Housing
3114, 3116 and 3126 Engines Air in Fuel
3500B Engines and 3500 Engines with EUI Option Electrical Power Supply
3003, 3013, 3014 and 3024 Engines for Caterpillar Built Machines Rocker Shaft - Assemble - 3003 Engines
G3606 and G3608 Engines Actuator (Hydrax) - Install
Instructions For Correcting Speed Surge In 3406C PEEC III Truck Engines{1408} Instructions For Correcting Speed Surge In 3406C PEEC III Truck Engines{1408}
G3606 and G3608 Engines Actuator (Hydrax) - Assemble
Electronic Modular Control Panel II (EMCP II) For PEEC Engines Indicator for Overcrank - Troubleshoot
Electronic Modular Control Panel II (EMCP II) For MUI Engines Indicator for Low Coolant Level - Troubleshoot
G3606 and G3608 Engines Actuator (Hydrax) - Disassemble
Electronic Modular Control Panel II (EMCP II) For MUI Engines Indicator for High Water Temperature - Troubleshoot
G3606 and G3608 Engines Caterpillar Ignition System (CIS) Module - Remove and Install
Electronic Modular Control Panel II (EMCP II) For PEEC Engines No Engine Shutdown - Troubleshoot
3500B Engines and 3500 Engines with EUI Option Analog Sensor Supply
3126B Marine Engine Cylinder Head Valves
3500B Engines and 3500 Engines with EUI Option Cat Data Link
3126B Marine Engine Piston and Rings
3500B Engines Electronic Control Module (Engine) - Remove and Install
Converting a Four Cylinder Air Compressor Air Supply From a Pressurized Air Supply to a Naturally Aspirated Air Supply{1803} Converting a Four Cylinder Air Compressor Air Supply From a Pressurized Air Supply to a Naturally Aspirated Air Supply{1803}
Electronic Modular Control Panel II (EMCP II) For PEEC Engines Erratic GSC Operation - Troubleshoot
3114, 3116 and 3126 Engines Alternator Charge Rate Is High
3114, 3116 and 3126 Industrial, Marine and Generator Set Engines Belt Tensioner
3500B Engines Fuel Filter Housing - Remove - Spin-on Filter
Converting a Four Cylinder Air Compressor Air Supply From a Pressurized Air Supply to a Naturally Aspirated Air Supply{1803} Converting a Four Cylinder Air Compressor Air Supply From a Pressurized Air Supply to a Naturally Aspirated Air Supply{1803}
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.