PULLEY-FAN DR. 7F7568 - Caterpillar

MID 087 - Chassis ECMCID 0590 - Engine Control ECMFMI 14 - Special InstructionReference: See the data-link schematic in the back of this manual to determine the involved wires for the following tests.This diagnostic code indicates the chassis ECM detects the engine ECM is not sending the necessary parameters at the proper rate. The parameters update rate generated by the engine ECM is not correct. The following can cause this code:
Failed engine ECM fuse
Incorrect engine ECM software
Incorrect chassis ECM software
Incompatible software
Harness failure
ECM failureUse a calibrated digital multimeter for this procedure.System Response:
Some implement functions may not work properly.Test Step 1. CHECK THE FUSE
Turn off the keyswitch and the disconnect switch.
Check the engine ECM fuse. Expected Result:Fuse has not failed.Results:
OK - Fuse has not failed. Proceed to Test Step 2.
NOT OK - Fuse has failed.Repair: Replace the fuse.STOPTest Step 2. CHECK THE SOFTWARE
Use Cat® Electronic Technician (Cat ET) to verify that the software versions are correct and compatible. Expected Result:The proper software is installed.Results:
OK - The proper software is installed. Proceed to Test Step 3.
NOT OK - The proper software is not installed.Repair: Flash the proper software to the appropriate ECM. Cycle the keyswitch to initialize the new software. Ensure that the diagnostic code is no longer active.STOPTest Step 3. CHECK THE HARNESS
Inspect the harness. Clean the harness connector contacts.Inspect the harness connector contacts for corrosion or damage. Inspect the wire insulation for damage caused by heat, corrosion, or chafing.
Perform a 45 N (10 lb) pull test on each circuit wire.
Reconnect all harness connectors. Verify that the connectors are fully seated and the clips are fastened.
Check for intermittent problems. Using Cat ET, perform a wiggle test on the harness.
Turn on the disconnect switch and the keyswitch.
Operate the machine.
Check CID 0590 FMI 14 status. Expected Result:CID 0590 FMI 14 is not active.Results:
OK - CID 0590 FMI 14 is not active.Repair: The initial diagnostic code was probably caused by a poor connection at one of the connectors that was checked. Clear the diagnostic code.STOP
NOT OK - CID 0590 FMI 14 is active. Proceed to Test Step 4.Test Step 4. CHECK THE CAT DATA-LINK CIRCUITThe keyswitch and the disconnect switch are off.
Disconnect the harness from all the ECMs in the Cat data-link circuit.
Measure the resistance between the harness connector contacts for the following:
Engine ECM Cat data-link + and chassis ECM Cat data-link +
Engine ECM Cat data-link - and chassis ECM Cat data-link -
Reconnect all disconnected ECMs. Expected Result:The resistance is greater than 5000 ohms.Results:
OK - The resistance is greater than 5000 ohms. The engine ECM may have failed.Repair: Exit this procedure and perform this procedure again. Contact your technical communicator. If ECM replacement is required, see Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP
NOT OK - The resistance is less than 5 ohms. The circuit is shorted.Repair: Repair or replace the harness.STOP