IT28G Integrated Toolcarrier and 924G, 924GZ and 928G Wheel Loaders Caterpillar

MID 081 - CID 0826 - FMI 04

Usage:

Conditions Which Generate This Code:

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Illustration 1	g00896007
Schematic of the circuit of the temperature sensor (torque converter oil)

This diagnostic code is recorded when the ECM reads the signal voltage of the temperature sensor (torque converter oil) and the voltage is too low.

The possible causes of this failure are listed here:

The diagnostic code of CID 0826 FMI 04 will be logged in the internal memory of the ECM.

Test Step 1. CHECK THE SENSOR.

Expected Result:

The diagnostic code changes from CID 0826 FMI 04 to CID 0826 FMI 03.

Results:

OK - The diagnostic code changed from CID 0826 FMI 04 to CID 0826 FMI 03. This indicates that the failure is no longer present. The sensor has failed.
Repair: Replace the sensor.

STOP
NOT OK - The diagnostic code remains. The failure remains present. The sensor is not causing the failure. Proceed to test step 2.

Test Step 2. CHECK THE HARNESS.

The sensor remains disconnected from the machine harness.
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the J1 and J2 machine harness connectors from the ECM.
At the machine harness connector for the sensor, measure the resistance between the signal contact 1 (wire 443-YL(Yellow)) and frame ground.

Expected Result:

The resistance is greater than 5000 ohms.

Results:

OK - The resistance is greater than 5000 ohms. The harness circuit resistance is correct. The ECM may have failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure, and perform this procedure again. If the failure is not found, replace the ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".

STOP
NOT OK - The resistance is less than 5000 ohms. The machine harness has failed. There is a short between frame ground and the signal circuit in the machine harness.
Repair: Repair the machine harness or replace the machine harness.

STOP