BRACKET AS 2567904 - Caterpillar

properly.ReferenceRefer to the Troubleshooting, "Electrical Maintenance Guidelines" section of this manual. Perform the "Safe Shutdown Procedure for Electric Drive Tractors" before proceeding with this procedure.Results:
OK - The Safe Shutdown Procedure for Electric Drive Tractors has been performed. The Hazardous Voltage Present Lamp and the Monitoring System Display are indicating that the DC system voltage has been properly discharged. Repair: The disconnect switch can be turned to the OFF position. The machine can now be serviced.This procedure should not require the disconnection of any of the hazardous voltage connectors. However, if an AC connection enclosure is opened or if a hazardous voltage DC connector is disconnected, a multimeter must be used to check for DC voltage between all of the exposed conductors and frame ground. Do not make personal contact with the exposed conductors until you have manually measured for voltage between ground and the conductors. Verify that there is less than 50.0 VDC present between the all exposed AC or DC hazardous voltage conductors and frame ground before any other action is taken. Proceed to the next troubleshooting test step.Test Step 2. CHECK THE SENSOR CIRCUIT FOR A SHORT
Turn the key switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector J2 from the Motor ECM. Disconnect the machine harness 70 pin connector from the Power Inverter.
Inspect the harness connectors and clean all of the contacts of the harness connectors. Refer to the illustration above to check the temperature sensor connections on the machine harness connectors for both controls. Ensure that the wires and sockets are secured in the connector, the contacts are clean and the contacts are in good condition.
Examine the pins on the Motor ECM J2 connector that are used for the temperature sensor connections. Examine the pins on the Power Inverter 70 pin connector that are used for the temperature sensor connections. Ensure that the pins are secured in the connector, none of the pins are bent, the pins are clean and the pins are in good condition.
Disconnect the machine harness connector J2 from the Motor ECM. The machine harness is now completely disconnected.
At the machine harness 70 pin connector for the Power Inverter, measure the resistance between the sensor plus (+) contact 18 (wire N889-BU) and frame ground. Measure the resistance between the sensor (+) contact 18 (wire N889-BU) and each of the other contacts that are used on the 70 pin connector for the Power Inverter.
At the machine harness 70 pin connector for the Power Inverter, measure the resistance between the sensor minus (-) contact 52 (wire N890-BR) and frame ground. Measure the resistance between the sensor minus (-) contact 52 (wire N890-BR) and each of the other contacts that are used on the 70 pin connector for the Power Inverter.Expected Result:Each of the resistance measurements between each of the sensor circuits, frame ground and all of the other circuits that are used in the harness is greater than 5000 ohms.Results:
OK - Each of the resistance measurements is greater than