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| Illustration 1 | g01042827 |
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Schematic of the body position sensor | |
This diagnostic code is associated with the body position sensor. This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) reads the voltage of the sensor as being above normal.
The possible causes of this diagnostic code are listed here:
- A shorted harness
- An open supply circuit to the sensor
- A failed sensor
- An open circuit
- The ECM may have failed. This is unlikely.
Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1175 FMI 03 is active before performing this procedure.
Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.
System Response:
The body snub function for the hoist system does not operate properly when the body is lowered. The gear of the machine is limited. The gear is limited to the current setting for the gear limit function. The hoist system will operate properly after the diagnostic code has been corrected.
Test Step 1. CHECK THE SUPPLY VOLTAGE AT THE SENSOR
- Turn the battery disconnect switch and the key start switch to the ON position.
- Check the voltage at the machine harness connector of the sensor from contact A (sensor supply) to contact B (ground). Do not disconnect the sensor. Use the 7X-1710 Multimeter Probe to measure the voltage.
Note: Check that circuit breaker #10 is not open.
Expected Result:
The voltage should measure approximately +battery.
Results:
- OK - The voltage is approximately +battery. The voltage is correct. Proceed to Test Step 3.
- NOT OK - The voltage is not approximately +battery. There is an open in the machine harness or the ECM has failed. It is unlikely that the ECM has failed. Proceed to Test Step 2.
Test Step 2. CHECK FOR AN OPEN IN THE SUPPLY CIRCUIT
- The key start switch and the battery disconnect switch remain in the ON position.
- Disconnect the sensor from the machine harness.
- At the machine harness connector for the sensor, measure the voltage from contact A (sensor supply) to frame ground.
Expected Result:
The voltage measures approximately +battery.
Results:
- OK - The voltage measures approximately +battery. The return circuit is open. Proceed to Test Step 3.
- NOT OK - The voltage does not measure approximately +battery. The supply circuit is open.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 3. CHECK THE SIGNAL CIRCUIT
- Turn the battery disconnect switch and the key start switch to the ON position.
- Disconnect the machine harness connector from the sensor.
- At the machine harness connector for the sensor, measure the voltage between contact C (signal) and contact B (ground).
Expected Result:
The voltage should measure approximately 5 DCV.
Results:
- OK - The voltage is approximately 5 DCV. The voltage is correct.
Repair: Replace the sensor.
STOP
- NOT OK - The voltage is not approximately 5 DCV. The voltage is not correct. Proceed to Test Step 4.
Test Step 4. CHECK FOR AN OPEN SIGNAL CIRCUIT
- Turn the key start switch and the battery disconnect switch to the OFF position.
- The sensor remains disconnected from the machine harness.
- Disconnect the machine harness from the ECM.
- Place a jumper wire between contact C (signal) and contact B (ground) of the machine harness connector for the sensor.
- At the machine harness connector of the ECM, measure the resistance between the signal contact and frame ground.
Expected Result:
The resistance measures less than 5 ohms.
Results:
- OK - The resistance measures less than 5 ohms. The circuit is correct. Proceed to Test Step 5.
- NOT OK - The resistance is greater than 5 ohms. The circuit is open.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 5. CHECK THE SIGNAL WIRE FOR SHORTS
- The battery disconnect switch and the key start switch remain in the OFF position.
- The machine harness remains disconnected from the ECM.
- Remove the jumper wire from contact C and contact B on the machine harness connector for the sensor.
- At the J2 connector of the machine harness for the ECM, measure the resistance from contact J2-18 to all contacts that have +battery.
Expected Result:
Each measurement is greater than 5 ohms.
Results:
- OK - Each measurement is greater than 5 ohms. Proceed to Test Step 6.
- NOT OK - The resistance measured less than 5 ohms. There is a short in the machine harness.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 6. CHECK IF THE DIAGNOSTIC CODE REMAINS
- Inspect the contacts of the harness connectors and clean the harness connectors.
- Reconnect all the harness connectors.
- Turn the battery disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 1175 FMI 03.
Expected Result:
The CID 1175 FMI 03 is active.
Results:
- YES - The CID 1175 FMI 03 is active. The diagnostic code has not been corrected. The ECM may have failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. Refer to Systems operation, Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Replace" for the machine that is being serviced.
STOP
- NO - The CID 1175 FMI 03 is not active. The diagnostic code does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
STOP