815 Soil Compactor and 816 Landfill Compactor Systems Speed Sensor

Speed Sensor - Test

815 Soil Compactor and 816 Landfill Compactor Systems [M0113643]

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ELECTRICAL AND STARTING SYSTEM

SENSOR GP

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815 Soil Compactor and 816 Landfill Compactor Systems Sensor Signal (Analog, Passive) - Test

815 Soil Compactor and 816 Landfill Compactor Systems Sensor Signal (PWM) - Test

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815 Soil Compactor and 816 Landfill Compactor Systems Speed Sensor - Test

1.1. Transmission ECM

2.1. Diagnostic Trouble Code Procedure

3.1. FMI 8

Transmission ECM

The following is a list of Diagnostic Trouble Codes (DTCs) associated with the speed sensors of the machine.

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Table 1
Transmission ECM (MID 081)
J1939	CDL	Code Description	System Response
	0585-8	Transmission Output Speed Sensor #1 : Abnormal Frequency, Pulse Width, or Period	Transmission shifting may be harsh. The transmission control may be unable to determine the direction of travel. The transmission control will be unable to determine the ground speed of the machine.
	0672-8	Torque Converter Output Speed Sensor : Abnormal Frequency, Pulse Width, or Period	Transmission shifting may be harsh. The transmission control may be unable to determine the direction of travel. The transmission control will be unable to determine the ground speed of the machine.
	0673-8	Transmission Output Speed Sensor #2 : Abnormal Frequency, Pulse Width, or Period	Transmission shifting may be harsh. The transmission control may be unable to determine the direction of travel. The transmission control will be unable to determine the ground speed of the machine.

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Illustration 1	g06603345
Transmission ECM Speed Sensor connections

The preceding diagram is a simplified schematic of the Transmission ECM connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, M0115149 or Electrical Schematic, M0115151 for the complete schematic.

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Table 2
Sensor Description	Resistance
(CID 0585–8) Transmission Output Speed Sensor #1 Speed Sensor	1450 ± 180 Ohms @ 25 °C (77 °F)
(CID 0672-8) Torque Converter Output Speed Sensor
(CID 0673-8) Transmission Output Speed Sensor #2

Diagnostic Trouble Code Procedure

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Table 3
Required Tools
Tool	Part Number	Description	Qty
T1	146-4080⁽¹⁾	Digital Multimeter Group	1
	8T-3224	Needle Tip Group	1
	7X-1710	Multimeter Probe Group	1
	8T-8726	Cable Assembly (Three Pin) (3-Pin Breakout)	1
T2	JERD2129	Cat^® Electronic Technician (Cat ET)	1
		Windows-based PC	1
	538-5051	Communication Adapter Gp	1
T3	6V-4148	Connector Repair Kit (Sure Seal)	1
T4	190-8900	Connector Field Repair Kit (Deutsch)	1
T5	175-3700	Connector Repair Kit Deutsch DT	1

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⁽¹⁾	This multimeter can use an RS232C cable to connect to a Laptop computer or Dataview tool gp for troubleshooting.

Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure. For sensors powered via the fuse panel, check the condition of the appropriate fuse before beginning the troubleshooting procedure.

Identify the active FMI code associated with the components.
Determine which code is present and use the list below to determine which procedure to follow.

FMI 8 diagnostic code, proceed to "FMI 8".

FMI 8

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Table 4
Verify The Software Version
Troubleshooting Test Steps	Values	Results
1. Check and record the latest software version for the machine electronic controls from SIS. 2. Verify that the latest version of software has been loaded to the ECM.	The software is current.	Result: All the software is current. Proceed to "Check The Resistance Of The Sensor" Table 5. Result: There is a more recent software release that is available. Repair: Flash all controls with the latest software release. Refer to Troubleshooting, "ECM Software - Install". Proceed to "Check If The Diagnostic Code Remains" Table 8.

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Table 5
Check The Resistance Of The Sensor
Troubleshooting Test Steps	Values	Results
1. Turn the key start switch and disconnect switch to the OFF position. 2. Disconnect the sensor from the machine harness. 3. Measure the resistance between contacts 1 and 2 of the connector for the speed sensor. 4. Refer to the table above for the correct resistance values.	The resistance values for the speed sensors are correct according to the table above.	Result: The resistance of the speed sensor is within the expected range. Proceed to "Check The Signal Circuit For An Open" Table 6. Result: The resistance of the speed sensor is outside the expected range. The speed sensor has failed. Repair- Replace the speed sensor. Proceed to "Check If The Diagnostic Code Remains" Table 8.

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Table 6
Check The Signal Circuit For An Open
Troubleshooting Test Steps	Values	Results
1. The key start switch and the disconnect switch remain in the OFF position. 2. Disconnect the machine harness connector from the sensor. 3. Disconnect the machine harness connectors from the ECM. 4. At the harness connector for the sensor, place a jumper wire between the signal contact and the return contact. 5. At machine harness connector for ECM, measure the resistance between the signal contact the return contact.	The resistance value is less than 5 Ω.	Result: The resistance value is less than 5 Ω. The harness is correct. Proceed to "Check The Signal Circuit For A Short" Table 7. Result: The resistance is greater than 5K Ω. There is an open circuit in the signal circuit or the return circuit. Note: A resistance greater than 5 Ω but less than 5KΩ indicates a loose connection or corroded connection in the circuit. A resistance value that is greater than 5K Ω would indicate an open in the circuit. Repair: Repair or replace the machine harness. Proceed to "Check If The Diagnostic Code Remains" Table 8.

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Table 7
Check The Signal Circuit For A Short
Troubleshooting Test Steps	Values	Results
1. The disconnect switch and the key start switch remain OFF. 2. The sensor and the ECM remain disconnected from the harness. 3. Measure the resistance between the signal contact and all other contacts used in the ECM harness connectors.	The resistance values are greater than 5K Ω.	Result: The resistance values are greater than 5K Ω. The harness circuit is correct. Proceed to "Check If The Diagnostic Code Remains" Table 8. Result: A resistance value is less than 5 Ω. Repair: A short exists in the harness between the signal circuit and the circuit with the low resistance value. Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance value that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 8.

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Table 8
Check If The Diagnostic Code Remains
Troubleshooting Test Steps	Values	Results
1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the key start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety lock. 6. Check if the diagnostic code is active.	The diagnostic code is no longer present.	Result: The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. Result: The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP.