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SOFTWARE GP- 2228533 - Caterpillar


2228533 SOFTWARE GP- Caterpillar parts
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Alternative (cross code) number:
CA2228533
222-8533
2228533
Caterpillar 2228533 SOFTWARE GP-

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Possible Causes for an FMI 3 Diagnostic Code are:
The power supply circuit for the sensor is open.
The return circuit is open.
The signal circuit is open or the sensor is disconnected.
The signal circuit is shorted to the sensor power supply.
The sensor has failed.
The sensor was activated in Cat® ET when the component is not on the machine.
The ECM has failed. This situation is unlikely.Possible Causes for an FMI 4 Diagnostic Code are:
The signal circuit for the sensor is shorted to ground.
The sensor has failed.
The ECM has failed. A failure of the ECM is unlikely.
Illustration 1 g06012698
Schematic for the Analog, Active Sensors associated with the Transmission ECM.
Note: The diagram above is a simplified schematic of the Transmission ECM connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. For the latest version of schematic, refer to Electrical Schematic, UENR5399, "994K Wheel Loader Electrical System".Diagnostic Trouble Code (DTC) Procedure
Note: 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.
Table 2
Troubleshooting Test Steps Values Results
1. Identify Active DTC Code Associated With Sensor Circuit
A. Use Cat ®ET to confirm all logged diagnostic codes for the machine.
B. Compare the codes to the codes listed in the table above.
Code is present. FMI 3 diagnostic code, proceed to Test Step 2.
FMI 4 diagnostic code, proceed to Test Step 5.
Begin Process For FMI 3 Troubleshooting HERE
2. Check The Supply Voltage At The Sensor
A. Turn key start switch and disconnect switch to the ON position.
B. Disconnect the machine harness from the sensor.
C. Refer to the schematic to determine the voltage source for the suspected faulty sensor.
D. Measure voltage between supply and return contacts at the machine harness connector for the sensor.
Voltage is 5 0.3 VDC. OK - The voltage reading is correct for the suspected faulty sensor.
Proceed to Test Step 3.
STOP
NOT OK - The voltage is NOT correct for the circuit.
Repair: If there is an active CID 41, troubleshoot the code. If there is not an active CID 41, replace the circuit breaker associated with the sensor.
3. Check For An Open In The Sensor Circuit
A. The sensor remains disconnected from the machine harness.
B. Turn the key start switch and the disconnect switch to the OFF position.
C. At the harness connector for the sensor, place a jumper wire between the signal contact and frame ground.
D. Disconnect the J1 and J2 harness connectors from the ECM.
E. At machine harness connector for the ECM, measure the resistance from the signal contact for the sensor to frame ground.
F. Gently pull on the wire and move the wire in a circular motion at ECM connector and observe the resistance readings. Repeat the process for the sensor connector.
The resistance is less than 5 Ωconstantly


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