815 Soil Compactor and 816 Landfill Compactor Systems Sensor Signal (Analog, Active)

Table 1
	Transmission ECM (MID 081)
J1939	CDL	Code Description	System Response
	0096-3	Fuel Level Sensor : Voltage Above Normal	Fuel level display is disabled.
	0096-4	Fuel Level Sensor : Voltage Below Normal	Fuel level display is disabled.

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Illustration 1	g06602482
Transmission ECM active analog connections

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

Implement ECM

The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the active analog sensors of the machine.

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Table 2
	Implement ECM (MID 082)
J1939	CDL	Code Description	System Response
	2661-3	Cab Air Temperature Control : Voltage Above Normal	The Auto Temperature Control feature is disabled.
	2661-4	Cab Air Temperature Control : Voltage Below Normal	The Auto Temperature Control feature is disabled.

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Illustration 2	g06602488
Implement ECM active analog connections

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

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.

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 3 diagnostic code, proceed to "FMI 3".
FMI 4 diagnostic code, proceed to "FMI 4".

FMI 3

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Table 4
Check The Voltage At The Sensor
Troubleshooting Test Steps	Values	Results
1. Turn key start switch and disconnect switch ON. 2. Refer to the schematic to determine the voltage source for the sensor. 3. At the machine harness connector for the sensor, insert 7X-1710 multimeter probes along the sensor supply and sensor return. 4. At the sensor harness connector, measure voltage between the sensor supply and sensor return.	Voltage reading is correct for the sensor.	Result: The voltage reading is correct for the sensor. Proceed to "Check The Harness For An Open" Table 5. Result: The voltage is not correct for the circuit. Proceed to "Check The Harness For An Open" Table 5.

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Table 5
Check The Harness 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. At the sensor harness connector, install a jumper wire between the sensor return contact and signal contact. 4. Turn the key switch and disconnect switch ON. 5. Observe the status of the diagnostic code.	The diagnostic code changes from an FMI 3 to an FMI 4.	Result: The diagnostic code changes from an FMI 3 to an FMI 4. The sensor has failed. Repair: Replace the sensor. Proceed to "Check If The Diagnostic Code Remains" Table 7. Result: The diagnostic code does not change from an FMI 3 to an FMI 4. Proceed to "Check Signal Circuit For A Short To +Battery" Table 6.

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Table 6
Check Signal Circuit For A Short To +Battery
Troubleshooting Test Steps	Values	Results
1. Turn the key start switch and the disconnect switch to the OFF position. 2. Disconnect the ECM harness connectors. The sensor harness connector remains disconnected. 3. Remove the jumper wire that was installed in the previous test step. 4. At the ECM harness connector, measure the resistance between the signal contact and all other +battery circuits used in the ECM harness connectors.	Each resistance is greater than 5K Ω.	Result: Each resistance is greater than 5K Ω. The harness circuit is correct. Proceed to "Check If The Diagnostic Code Remains" Table 7. Result: The resistance is less than 5 Ω. A short exists in the harness between the signal circuit and the circuit with the low-resistance measurement. Repair: 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 measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 7.

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Table 7
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.

FMI 4

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Table 8
Check The Sensor
Troubleshooting Test Steps	Values	Results
1. Turn the disconnect switch and the key start switch ON. 2. Disconnect the sensor from the machine harness. 3. Observe the status of the diagnostic code as the sensor is disconnected from the harness.	The code changes from an FMI 4 to an FMI 3 when the sensor is disconnected.	Result: The code changes from an FMI 4 to an FMI 3 when the sensor is disconnected. The sensor has failed. Repair: Replace the sensor. Proceed to "Check If The Diagnostic Code Remains" Table 10. Result: The FMI 4 diagnostic code remains active when sensor is disconnected. The sensor is not the cause of the problem. Proceed to "Check The Signal Circuit For A Short To Ground" Table 9.

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Table 9
Check The Signal Circuit For A Short To Ground
Troubleshooting Test Steps	Values	Results
1. Turn the key start switch and the disconnect switch OFF. 2. Disconnect the harness connectors from the ECM. 3. At the ECM harness connector, measure the resistance between the sensor signal contact and all other contacts used in the ECM harness connectors.	The resistance is greater than 5K Ω.	Result: The resistance is greater than 5K Ω. The harness circuit is correct. Proceed to "Check If The Diagnostic Code Remains" Table 10. Result: The resistance is less than 5 Ω. A short circuit exists between the signal circuit and the circuit with the low-resistance measurement. Repair: 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 measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 10.

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Table 10
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 a 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.