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| Illustration 1 | g00751378 |
Schematic of the Solenoid (Slip Limit) | |
This diagnostic code is recorded when the ECM reads the current of the solenoid as being above normal. There is a short to ground.
The possible causes of this diagnostic code are listed:
- The signal circuit of the solenoid is shorted to ground.
- The solenoid has failed.
- The ECM has failed. This is unlikely.
System Response:
When this diagnostic code occurs, a warning (Category 1) is shown on the monitor. The diagnostic code will cause the solenoid to be de-energized at all times.
Note: Ensure that the CID 1323 FMI 06 is on hold and that the diagnostic code indicator shows "SERV CODE".
Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code is corrected.
Test Step 1. CHECK THE SOLENOID.
- Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
- Ensure that the CID 0349 FMI 06 is on hold.
- Observe the status of the diagnostic code indicator. "SERV CODE" will be showing or "SERV CODE" will not be showing.
- Disconnect the solenoid with the active diagnostic code from the machine harness.
Expected Result:
"SERV CODE" is no longer shown when the solenoid is disconnected.
Results:
- YES - The "SERV CODE" is no longer showing. The circuit is correct.
Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.
Stop.
- NO - The "SERV CODE" remains present. The diagnostic code remains active. Proceed to test step 2.
Test Step 2. CHECK THE SOLENOID CIRCUIT FOR A SHORT TO GROUND.
- Turn the key start switch and the disconnect switch to the OFF position.
- Disconnect the machine harness from the solenoid.
- Disconnect the machine harness connector J1 and machine harness connector J2 from the ECM.
- At the machine harness connector, measure the resistance from the signal contact J1-17 (wire 969-GY) to all possible sources of ground.
Expected Result:
There should be greater than 5000 ohms resistance for each measurement.
Results:
- OK - The resistance measurement is greater than 5000 ohms for each measurement. The machine harness is correct. Proceed to test step 3.
- NOT OK - The resistance is not correct. There is a short in the machine harness.
Repair: The short is between wire (969-GY) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.
Stop.
Test Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
- Inspect the harness connectors and clean the contacts of the harness connectors.
- Reconnect all harness connectors.
- Turn the disconnect switch and the key start switch to the ON position.
- Enter service mode of the Caterpillar Monitoring System and clear all inactive diagnostic codes.
- Operate the machine.
- Determine if CID 0349 FMI 06 for the solenoid is present. "SERV CODE" is showing.
Expected Result:
The CID 01323 FMI 06 for the solenoid is NOT present. "SERV CODE" is NOT showing.
Results:
- YES - The diagnostic code is NOT present. The diagnostic code does not exist at this time. 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.
- NO - The diagnostic code has not been corrected.
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. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".
Stop.