PM620, PM622, PM820, PM822 and PM825 Cold Planers Electronic System Sensor Signal (Analog, Passive)

Sensor Signal (Analog, Passive) - Test

PM620, PM622, PM820, PM822 and PM825 Cold Planers Electronic System [UENR6406]

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ELECTRICAL AND STARTING SYSTEM

SENSOR GP

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1.1. Transmission ECM

2.1. Diagnostic Trouble Code Procedure

Transmission ECM

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Table 1
Transmission ECM (MID 81)
DTC	Code Description	System Response
600-3	Hydraulic Oil Temperature Sensor : Voltage above normal	When the voltage reading from the temperature sensor exceeds 4.90 V for at least 3 seconds, the diagnostic code is active. The diagnostic code remains active until the voltage is below 4.90 V for 200 msec.
600-4	Hydraulic Oil Temperature Sensor : Voltage below normal	When the voltage reading for the temperature sensor is below 0.20 V for at least 3 seconds, the diagnostic code is active. The diagnostic code remains active until the voltage is above 0.20 V for 200 msec.

Before performing this procedure, inspect the harness connectors that are involved in the 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 this diagnostic code is active before performing this procedure.

Possible Causes for an FMI 3 Diagnostic Code are:

The return circuit is open.
The signal circuit is open or the sensor is disconnected.
The signal circuit for the sensor is shorted to the +battery.
The sensor has failed.
The Machine ECM has failed. A failure of the Machine ECM is unlikely.

Possible Causes for an FMI 4 Diagnostic Code are:

The sensor has failed
The signal circuit for the sensor is shorted to ground
The Machine ECM has failed. A failure of the Machine ECM is unlikely.

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Illustration 1	g06031146
Transmission ECM Sensor Signal (Analog, Passive) Connections

Note: The preceding diagrams are simplified schematics for the Sensors (Analog, Passive) of the Transmission ECM. The schematics are electrically correct. However, not all the possible harness connectors are shown.Refer to the appropriate media number below for the complete Electrical Schematic: (S/N: JCF; LH9; 8RF; EL6) Machines refer to Electrical Schematic, UENR6397. (S/N: JB9; JFC; LB8; FG4; TPH; XS6) Machines refer to Electrical Schematic, UENR6398. (S/N: JB7; HN8; HC8; RL3; H6S; 626) Machines refer to Electrical Schematic, UENR8363. (S/N: SL8; TLZ; ESE; AK5; AN8; EE2; E8S; 3C6; 627) Machines refer to Electrical Schematic, UENR8362.The schematic will illustrate locations for all the electrical components and harness connectors that are installed on the machine.

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Table 2
TEMPERATURE SENSORS
CID: 600
CELSIUS TEMPERATURE	FAHRENHEIT TEMPERATURE	RESISTANCE
-40	-40	33650.2 Ω
-30	-22	17709.4 Ω
-20	-4	9716.7 Ω
-10	14	5538 Ω
0	32	3268.3 Ω
10	50	1991.4 Ω
20	68	1249.5 Ω
30	86	805.5 Ω
40	104	532.3 Ω
50	122	360 Ω
60	140	248.7 Ω
70	158	175.2 Ω
80	176	125.7 Ω
90	194	91.7 Ω
100	212	68 Ω
110	230	51.2 Ω
120	248	39 Ω
130	266	30.1 Ω
140	284	23.6 Ω

Diagnostic Trouble Code Procedure

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Table 3
Troubleshooting Test Steps	Values	Results
1. Identify The Active DTC Code Associated With The Suspect Circuit	Code is present.	FMI 3 diagnostic code: proceed to Test Step 2. FMI 4 diagnostic code: proceed to Test Step 7.
Begin Process For FMI 3 Troubleshooting HERE
2. Identify the Type Sensor A. Determine whether the sensor is a temperature sensor, a fuel level sensor, or a seat sensor. Note: This procedure covers temperature sensors, the fuel level sensor, and the seat sensor.	Sensor is present.	Temperature Sensor: proceed to Test Step 3. Fuel Level Sensor: proceed to Test Step 4. Operator In Seat Sensor: proceed to Test Step 5.
3. Check The Temperature Sensor Note: See the tables above for a list of resistances related to specific values for the specific CID. A. Turn the key start switch and the disconnect switch to the OFF position. B. Disconnect the sensor from the harness. C. Measure the resistance between pin 1 and 2 of the sensor.	The resistance reading agrees with the values from the table.	OK - The resistance reading agrees with the values in the table. Proceed to Test Step 6. NOT OK - The resistance reading does not agree with the values in the table. Repair: Replace the sensor. STOP
4. Check For An Open In The Sensor Circuit A. The key start switch and disconnect switch remain in the OFF position. B. The harness connector remains disconnected from the sensor. C. Disconnect the J1 and J2 connectors from the ECM. D. At the harness connector of the sensor, install a jumper wire. E. At the harness connector for the ECM measure the resistance at the contacts for the sensor.	The resistance reading is less than 5 Ω.	OK - The resistance is less than 5 Ω. Proceed to Test Step 5. NOT OK - The resistance is greater than 5 Ω. Repair: Either the signal or the return circuit wire is open. Repair or replace the harness. STOP
5. Check The Signal Circuit For A Short. A. The disconnect switch and the key start switch remain in the OFF position. B. The harness connectors J1 and J2 remain disconnected from the ECM. C. Remove the jumper wire that was installed during the previous Test Step. D. At the ECM harness connectors measure the resistance between the positive connector and all J1 and J2 contacts.	Each resistance reading is greater than 5K Ω.	OK - Each measurement is greater than 5000 Ω. Proceed to Test Step 10. NOT OK - A resistance measurement is less than 5000 Ω. Repair: A short exists between the signal circuit and the circuit with the low-resistance measurement. Repair or replace the machine harness.
Begin Process For FMI 4 Troubleshooting HERE
6. Check The Sensor A. Turn key start switch and disconnect switch ON. B. Ensure that the diagnostic code is active. C. Disconnect sensor from machine harness. D. Observe the status of the diagnostic code.	DTC changes from an FMI 4 to an FMI 3.	OK - DTC changes from an FMI 4 to an FMI 3. Repair: Replace the sensor. STOP. NOT OK - The FMI 04 remains active. Proceed to Test Step 7. STOP
7. Check The Wiring Harness Of The Sensor For A Short To Ground A. Turn the key start switch and the disconnect switch OFF. B. Disconnect machine harness connection at sensor. C. Disconnect machine harness connections at switch panel. D. At the machine harness connector for the switch panel, measure resistance from the signal contact of machine harness to all possible sources of ground. Measure resistance to all contacts of machine harness connectors for the ECM.	Each reading greater than 5K Ω.	OK - All resistance readings are greater than 5K Ω. Proceed to Test Step 8. NOT OK - One or more of the readings are less than 5 Ω. Repair: A short exists between the signal contact and the circuit with the low resistance. 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. STOP
8. Check If The Diagnostic Code Remains A. Turn the key start switch and the disconnect switch ON. B. Clear all diagnostic codes. C. Operate the machine. D. Stop the machine and engage safety lock lever. E. Check if diagnostic code for the sensor is active.	DTC Code is no longer active.	OK - Diagnostic code does not exist currently. Initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors. Resume normal machine operation. NOT OK - Diagnostic trouble code has not been corrected. Repair: If the diagnostic code has not been corrected after performing the procedure a second time, follow the procedure below for replacing the ECM. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may greatly reduce repair time. If the ECM requires replacement, see Troubleshooting, "ECM - Replace". STOP