REGULATOR GP-VOLTAGE 3270284 - Caterpillar

EPTC II Replacement
Prior to replacement of EPTC II, ensure that replacement is absolutely necessary. Rarely is EPTC II the cause of a fault. Always check that power is available to EPTC II; battery voltage is required between contacts A1 and A2 of machine harness connector "A" for EPTC II. Check the connectors for damage.Because of the large quantity and variety of machines EPTC II is used on, there are different part numbers for EPTC II. The EPTC II's look the same, but are different internally. The correct replacement EPTC II must be used.Procedure
1. Turn the key start switch to the OFF position. Disconnect the machine harness connectors "A" and "B" from EPTC II.2. Remove EPTC II from the machine.3. Make sure the replacement EPTC II has the correct part number.4. Install the replacement EPTC II.5. Connect the machine harness to EPTC II.6. Turn the disconnect and key start switches to the ON position. Make sure EPTC II successfully completes the self test; see the subject Self Test.Glossary EPTC II Terms
+Battery+Battery refers to any of the harness wiring which is part of the circuit that connects to the positive battery post.CID (Component Identifier)The CID is a three digit code that tells which component is faulty. For example; shift lever switch, TOS sensor or up solenoid. The CID is shown on the EPTC II display when in normal mode or detected fault mode.ClearClear refers to erasing diagnostic information from the memory of EPTC II.Connector ContactA connector contact is the component of a harness connector that actually makes the electrical connection. Connector contacts are either pins or sockets. Data EventA data event is an occurrence of abnormal or abusive machine operation. Based on a combination of signals at the EPTC II connector, EPTC II decides when the machine is operating abnormally. Data events are remembered by EPTC II and are viewed by using a service tool.Detected FaultA detected fault is a fault that has been found by EPTC II. The fault is recorded and diagnostic information is available when in detected fault mode (mode 2).DiagnosticDiagnostic refers to the showing, monitoring and/or recording of information other than normal. Diagnostic information is available from each display mode.DisplayDisplay refers to the readout and indicators that are visible through the cover of EPTC II.EventWhenever EPTC II records information it is called an event. It categorizes the events into either a fault event or a data event.Fault or Fault EventA fault is a failure of a component of the EPTC II system. Faults are detected by EPTC II when a signal at the EPTC II connector is outside a valid range. For example; open or shorted harness, faulty switch, or faulty sensor. The CID and FMI for detected faults (fault events) are shown on the EPTC II display when in normal mode or detected fault mode.FMI (Failure Mode Identifier)The FMI is a two digit code that tells what type of failure has occurred. For example; voltage above normal, current below normal or abnormal frequency. The two