CONTACT-HOLDER 2S8708 - Caterpillar

Illustration 1 g01304266
Supply voltage connections for the IQAN XP2 A1 module.This diagnostic code is associated with the power signal that is supplied to the IQAN XP2 A1 module at pin 15 and pin 28 of the IQAN XP2 A1 module. The "LOW SUPPLY VOLTAGE" code means that the voltage supply to the module is less than 8.5 VDC.The possible causes of this diagnostic code are listed below:
The power supply is unable to deliver the minimum system voltage.
The energize circuit of the module is open in the harness.
The module has failed. This is unlikely.Test Step 1. CHECK THE POWER SUPPLY FOR THE MODULE
Turn the disconnect switch and the key start switch to the ON position.
Check the voltage at the mating connector pins on the IQAN XP2 A1 module from contact 15 (wire 200-BK) to contact 28 (wire 143-GY).Expected Result:The voltage measurement is approximately 24 VDC.Results:
YES - The voltage measurement is approximately 24 VDC. The module power supply is correct. Proceed to Test Step 2.
NO - The voltage measurement is not approximately 24 VDC. There is a problem with the voltage supply for the module.Repair: The voltage supply circuit (wire 143-GY) for the module is open in the machine harness. Ensure that the IQAN XP2 A1 fuse is not open. Refer to the complete machine Electrical System Schematic. Examine all of the connections that are in the supply circuit between the fuse and the module. Ensure that the connections are clean, secure and in good condition. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Inspect the harness connectors and clean the contacts of the harness connectors and check the wires for damage to the insulation that is caused by excessive heat, battery acid, or chafing.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.
Reconnect all harness connectors making sure that the connectors are fully seated and the clips for each connector are completely fastened.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the "LOW SUPPLY VOLTAGE" code.Expected Result:The "LOW SUPPLY VOLTAGE" code is active.Results:
YES - The "LOW SUPPLY VOLTAGE" code is active. The diagnostic code has not been corrected.Repair: If the diagnostic code is still active, the module may be faulty.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 "LOW SUPPLY VOLTAGE" code 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