STARTING MOTOR GP-ELECTRIC 1025836 - Caterpillar

Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the "OFF" position.
Check the ECM connectors, the customer connectors, and wiring for damage or incorrect attachment.
Check for the correct installation of the wires for the J1939 data link. Refer to Installation Guide, "J1939 Data Link Wiring " for installation information.
Check the connectors for the following components for abrasion, corrosion, or incorrect attachment.
Messenger
Harness and wiringEnsure that the 165-0200 Cable As is securely connected to the Messenger.
Verify that the negative battery connections are secure and free from corrosion.
Verify that the belts and all connections for the charging system are secure and tight. Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, of abrasion, and of pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Perform the following repair:Repair the connectors or wiring and/or replace the connectors or the wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check Battery Voltage at the Display Connector
Disconnect the display connector.
Turn the keyswitch to the "ON" position.
Use a voltmeter and measure the DC voltage from terminal 1 to terminal 2 of the display connector. Pull on each of the wires in the connector.Expected Result: The battery voltage should be 11 to 13.5 VDC for 12 volt systems and 23 to 27 VDC for 24 volt systems.Results:
OK - The battery voltage is within specifications. Proceed to Test Step 3.
Not OK - The battery voltage is not within specifications.Repair: Isolate the problem and repair the problem.Verify that the repair eliminates the problem.STOPTest Step 3. Verify Correct Wiring for the Display
Disconnect the J1 ECM connector and measure the resistance between the connection for the J1939 Data Link + and the connection for the J1939 Data Link -. Refer to Table 1 for pin numbers.
Table 1
Terminal locations for the Data Link on the J1 ECM Connector
Engine J1939 Data Link + J1939 Data Link − Shield
3126B
3500B Series II
C7
C9
C12
C15
C18 J1-50 J1-34 J1-42
3176C
3196
3406E J1-33 J1-39 J1-26
3412E
3500B
C30
C32 J1-16 J1-10 J1-15 Expected Result:The range of the resistance is 57 Ohms to 63 Ohms.Results:
OK - The measurement is within specifications. Proceed to Test Step 5.
Not OK - The range of the resistance is 114 Ohms to 126 Ohms. A terminating resistor is missing.Repair: Install the missing resistor.Refer to the Schematic in order to determine the location of the missing resistor.Proceed to Test Step 5.
Not OK - Resistance is less than 50 Ohms. Proceed to Test Step 5.
Not OK - Resistance is greater than 130 Ohms. Proceed to Test Step 4.Test Step 4. Check Terminating ResistorsVerify that only two terminating resistors exist on the data link. One resistor should be located on each end of the data link.For additional information, refer to the Installation Guide, "J1939 Cable Specifications". In addition, refer to the Schematic for your particular engine.Expected Result:One terminating resistor is correctly installed at each end of