TK711, TK721, TK722, TK732, TK741, TK751 and TK752 Track Feller Bunchers IQAN MDM Monitor Fault ; Event Codes Caterpillar


Input High Error IQAN XT2 A0-24

Usage:

TK711 101
Conditions Which Generate This Code:


Illustration 1g01294338

Hydraulic oil temperature sender connections

This diagnostic code is associated with the hydraulic oil temperature sender. The "Input low error" means that the IQAN-XT2 module has determined that the voltage of the circuit for the sensor is above normal.

Note: This circuit contains a 4700 Ω resistor. The connections, the continuity, and the resistance value of this resistor should all be checked. The resistor is located in front of the swing motor between the tower plates of the upper frame on TK711 through TK732 machines. The resistor is located near the pilot manifold on the bottom side of TK741 through TK752 machines. The bottom cover plate must be removed in order to access the resistor on these machines.

The possible causes of this diagnostic code are listed below:

  • The signal circuit for the sensor is shorted to ground.

  • The sensor has failed.

  • The module has failed. This is unlikely.

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 has been corrected. Ensure that the diagnostic code of "Input high error" for pin 24 of the IQAN-XT2 module is active before performing this procedure.

Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.

Test Step 1. CHECK THE SENSOR

  1. Turn the disconnect switch and the key start switch to the ON position.

  1. Ensure that the diagnostic code is active.

  1. Observe the status of the diagnostic code. Disconnect the machine harness from the sensor.

Expected Result:

The "Input high error" for pin 24 of the IQAN-XT2 module remains active.

Results:

  • OK - The diagnostic code remains active. The sensor is correct. Proceed to Test Step 2.

  • NOT OK - The diagnostic code is no longer active. The sensor has failed.

    Repair: Replace the sensor.

    STOP

Test Step 2. CHECK THE WIRING HARNESS OF THE SENSOR AND THE RESISTOR FOR A SHORT TO GROUND

  1. Turn the key start switch and the disconnect switch to the OFF position.

  1. Disconnect the machine harness from the sensor.

  1. Disconnect the machine harness connectors from the IQAN-XT2 module.

  1. At the machine harness connector for the module, measure the resistance from the signal contact IQAN XT2 A0 - 24 (wire 442-GY) of the machine harness to all possible sources of ground. Measure the resistance to all contacts of the machine harness connectors for the module.

Expected Result:

Each resistance measurement is greater than 5000 ohms.

Results:

  • OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.

  • NOT OK - One or more resistance measurements is not correct. There is a short in the machine harness.

    Repair: The short is between signal contact IQAN XT2 A0 - 24 (wire 442-GY) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.

    STOP

Test Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE

  1. Inspect the harness connectors on the sensor, the resistor, and the module and clean the contacts of the harness connectors. Check the wires for damage to the insulation that is caused by excessive heat, battery acid, or chafing.

  1. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.

  1. Reconnect all harness connectors making sure that the connectors are fully seated and the clips for each connector are completely fastened.

  1. Turn the disconnect switch and the key start switch to the ON position.

  1. Operate the machine.

  1. Check the status of the "Input high error" for pin 24 of the IQAN-XT2 module.

Expected Result:

The "Input high error" for pin 24 of the IQAN-XT2 module is active.

Results:

  • YES - The "Input high error" for pin 24 of the IQAN-XT2 module is active. The diagnostic code has not been corrected. The module may have failed.

    Repair: If the problem is still present, replace the temperature sensor. After the sensor is replaced, perform this test step again. After sensor replacement, if the problem is still present, the module may be faulty.Exit this procedure and perform the diagnostic code procedure again. If the problem persists, the module may have failed. Prior to replacing a module, always contact your dealership's Technical Communicator for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the cause of the diagnostic code is not found, replace the module.

    STOP

  • NO - The "Input high error" for pin 24 of the IQAN-XT2 module 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 at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.

    STOP

Caterpillar Information System:

AP600D, AP655D, BG600D and BG655D Asphalt Pavers System Schematic
69D, 769D, 773D, 773E, 776D and 777D Off-Highway Trucks and 771D, 775D and 775E Quarry Trucks Power Train Electronic Control System System Schematic
140M Motor Grader Ether Starting Aid Cylinder - Replace
TK711, TK721, TK722, TK732, TK741, TK751 and TK752 Track Feller Bunchers IQAN MDM Monitor Fault ; Event Codes Input Low Error IQAN XT2 A0-24
The Paper Copy of Specifications, Systems Operation/Testing and Adjusting, KENR5054, "PM-201 Cold Planer Propel System" May Contain Wrong Content{7000} The Paper Copy of Specifications, Systems Operation/Testing and Adjusting, KENR5054, "PM-201 Cold Planer Propel System" May Contain Wrong Content{7000}
140M Motor Grader Fuel System Water Separator - Drain
C15 On-Highway Engine Inlet and Exhaust Valve Springs - Remove and Install
572R Series II Pipelayer Backup Alarm
140M Motor Grader Engine Oil and Filter - Change
572R Series II Pipelayer Battery Disconnect Switch
770, 772, 773E, 773F, 777E and 777F Off-Highway Trucks and 775F Quarry Truck VIMS Truck Payload System Using Advisor to Determine Diagnostic Codes
140M Motor Grader Transmission and Differential Oil - Change
Procedure for "Off-Board" Filtering Backhoe Loader and Integrated Toolcarrier Hydraulic Oil Equipped with Auxiliary Lines{0680, 0768, 5050, 5056, 5057} Procedure for "Off-Board" Filtering Backhoe Loader and Integrated Toolcarrier Hydraulic Oil Equipped with Auxiliary Lines{0680, 0768, 5050, 5056, 5057}
12M Motor Grader Drawbar Ball and Socket - Lubricate
TK711, TK721, TK722, TK732, TK741, TK751 and TK752 Track Feller Bunchers IQAN MDM Monitor Fault ; Event Codes Input Low Error IQAN XT2 A0-21
12M Motor Grader Drawbar Ball and Socket End Play - Check/Adjust
12M Motor Grader Scarifier Digging Angle - If Equipped
C175-16 and C175-20 Engines for Off-Highway Trucks Engine Oil Pressure - Test
D6K Track-Type Tractor Electrohydraulic Power Train Track Idler
D6K Track-Type Tractor Electrohydraulic Power Train Track
793D Off-Highway Truck Air System and Brakes Air Tank (Primary)
773F, 773F OEM, 777F and 777F OEM Off-Highway Trucks and 775F and 775F OEM Quarry Truck Vital Information Management System (VIMS) MID 053 - CID 0590 - FMI 09
793D Off-Highway Truck Power Train Transmission Planetary - Disassemble
793D Off-Highway Truck Power Train Transmission Planetary - Assemble
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.