SEAL 6V6898 - Caterpillar

Illustration 1 g01403069
Schematic of the torque converter oil temperature sensorThis diagnostic code is associated with the torque converter oil temperature sensor. This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) has determined that the Pulse Width Modulated (PWM) signal is out of range.Note: This diagnostic code is usually an intermittent condition. The diagnostic code may be active or the diagnostic code may not be active.The possible causes of this diagnostic code are listed below:
The PWM signal circuit is shorted to the +battery circuit or shorted to ground intermittently.
The PWM signal circuit is open intermittently or the sensor is disconnected.
The sensor may have failed.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 0826 FMI 08 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.Test Step 1. CHECK THE SIGNAL CIRCUIT FOR AN OPEN.
Turn the key start switch and the battery disconnect switch to the OFF position.
Disconnect the sensor from the machine harness connector.
Disconnect the machine harness connectors J1 and J2 from the ECM.
Place a jumper wire between contact C (SIGNAL) and contact B (GND) of the machine harness connector for the sensor.
At the machine harness connector J2 of the ECM measure the resistance between J2-17 (wire 452-PU) and frame ground.Expected Result:The resistance should be less than 5 ohms.Results:
YES - The resistance is less than 5 ohms. The machine harness is correct. Proceed to Test Step 2.
NO - The resistance is greater than 5 ohm.Repair: There is an open in the machine harness. Repair the machine harness or replace the machine harness. Verify that the repair eliminates the problem.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT FOR A SHORT.
The key start switch and the battery disconnect switch remain in the OFF position.
The machine harness connector for the sensor remains disconnected from the sensor.
Remove the jumper wire from the previous Test Step.
At the machine harness connectors J1 and J2 of the ECM, measure the resistance from contacts J2-17 (wire 452-PU) to all other J1 and J2 contacts.Expected Result:Each resistance measurement is greater than 5 ohms.Results:
YES - The resistance measurement is greater than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
NO - The resistance measurement is less than 5 ohms. The machine harness is not correct.Repair: There is a short in the machine harness. The short is between the machine harness connector J2-17 (wire 452-PU) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 3. 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 0826 FMI 08. Expected Result:The CID 0826 FMI