I know these are history codes so none of them are current but I would still like to know exactly what they mean if someone could help me out.

IPC
U1255H Serial Data Line Malfunction

LDCM
B2282H Battery #1 Fault
B2284H Battery #2 Fault
B2262H Horizontal Position Sensor Fit
B2264H Vertical Position Sensor Fault
U1064H Loss of Communications with BCM

RDCM
B2285H Battery #2 Fault
U1064H Loss of Communications with BCM

 

First, any Uxxxx code can pretty much be ignored. The Service Manual specifies they should be deleted unless there is some other symptom related to the Uxxxx code. They are communication failures between the computers in the car, and will happen randomly because the data bus the computers use is relatively slow by todays standards (about the speed of a dial-up connection) and there is a lot of data being moved on the bus.

All the other codes are related to a low voltage condition. These would post if a battery was weak or the car had some other reason for a low voltage condition (negative cable to the battery not well connected, etc.).

I'd clear (delete) all of the codes, and only worry when a new code appears. History codes can remain in the computers for a long time, so I would not worry about these, unless one or more re-occur again.

 

I would bet the battery failed/was replaced at some time in the past and these codes were set then. Here are the explanations for the codes:

DTC U1000 and U1255
Circuit Description
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation when operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least 1 critical parameter within about 5 seconds of beginning serial data communication, DTC U1000 or U1255 is set. The DTC will only be reported once if more than 1 critical parameter does not have a sending module identification number associated with it.

The following systems communicate on the class 2 serial data circuit:

Body Control Module (BCM)
Electronic Brake Control Module (EBCM)
Electronic Suspension Control (ESC) Module
HVAC (with CJ2)
Sensing and Diagnostic Module (SDM)
Instrument Panel Cluster (IPC)
Driver Door Module (DDM)
Passenger Door Module (PDM)
Seat Control Module (SCM) (with AAB)
Powertrain Control Module (PCM)
Radio
Remote Control Door Lock Receiver (RCDLR)
Conditions for Running the DTC
Voltage supplied to the module is in the normal operating voltage range.
Diagnostic trouble codes U1300, U1301 or U1305 are not set.
The module setting the DTC requires serial data communication to occur.
Conditions for Setting the DTC
At least 1 critical operating parameter has not been associated with an identification number within about 5 seconds after beginning serial data communication.

Action Taken When the DTC Sets
The module uses a default value for the missing parameter.

Conditions for Clearing the DTC
A current DTC U1000 or U1255 will clear when all critical operating parameter for the module have been associated with an identification number or at the end of the current ignition cycle.
A history DTC resets after 50 ignition switch cycles with no repeated failure.
Diagnostic Aids
When a malfunction such as an open fuse to a module occurs while modules are communicating, a current DTC is set indicating lost communication with a specific module DTC. When the modules stop communicating, ignition is turned OFF, the current Lost Communication DTC is cleared but the history DTC remains. When the modules begin to communicate again, the module with the open fuse will not be learned by the other modules so DTC U1000 or U1255 is set as current by the other modules. If the malfunction occurs when the modules are not communicating, only DTC U1000 or U1255 is set.

DTC B2282-B2285
Circuit Description
The driver door module (DDM) and passenger door module (PDM) each have a high and low power feed . The low power feed, battery 1, is used to provide power for the door module logic and internal driver operation. The high power feed, battery 2, is used to provide power for systems that draw higher amounts of current. The door modules monitor the voltage level at battery 1 and battery 2 to determine if the voltage level is out of range. If the voltage level is out of range, a DTC is set.

Conditions for Setting the DTC
The door module detects battery 1 or battery 2 voltage range under 8.5 volts or over 16.3 volts.
Condition must be present for greater than 2 seconds.
Action Taken When the DTC Sets
Stores a history DTC B2282, B2283, B2284 or B2285 in the door module memory.
These DTCs can only be set as a history code even if the malfunction is current.
No driver warning message will be displayed for this DTC.
Conditions for Clearing the DTC
The door module no longer detects battery 1 or battery 2 voltage below 8.5 volts or higher than 16.3 volts for greater than 2 seconds.
The DTC is cleared using the IPC clearing feature, or
The DTC is cleared using a scan tool.
Diagnostic Aids
The following conditions may cause an intermittent malfunction:
There is an intermittent open or short to ground in a battery 1 or battery 2 circuit.
The battery voltage is out of range.
A charging system malfunction.
Using a scan tool, select DCM Data display and monitor battery 1 and battery 2 voltage while operating the door locks and heated mirrors. This can determine if battery 1 or battery 2 voltage is affected by these devises and can help duplicate the malfunction.
If the DTC does not reset after the code is cleared, then the problem may be intermittent. Refer to Testing for Intermittent and Poor Connections in Wiring Systems.

DTC B2262-B2265
Circuit Description
The driver door module (DDM) and the passenger door module (PDM) receive mirror position signals from the mirror horizontal and vertical position sensors. These signals are used by the door modules for memory recall functions of the driver and passenger mirrors. The door modules command the mirror memory settings based upon the voltage level received back from the position sensors. Each door module provides a 5 volt supply, a signal and a ground circuit for each of the position sensors. The horizontal and vertical position sensors are variable resistors that the door modules monitor voltage levels across. When a memory setting is recalled, the door modules command the mirror motors in the appropriate directions until the stored position sensor voltage levels are achieved. The DDM and PDM monitor the signal circuits to determine if the voltage level is out of range. If the DDM or PDM detects a voltage level out of range for greater than 2 seconds, a DTC is set.

Conditions for Setting the DTC
The DDM or PDM detects a mirror position sensor signal voltage range under 0.1 volts or over 4.78 volts.
Condition must be present for greater than 2 seconds.
Action Taken When the DTC Sets
Stores a history DTC B2262, B2263, B2264 or B2265 in the DDM or PDM memory.
These DTCs can only be set as a history code even if the malfunction is current.
No driver warning message will be displayed for this DTC.
Conditions for Clearing the DTC
The DDM or PDM detects the correct mirror horizontal and vertical position sensor signal voltage range (0.1-4.78 volts) for longer than 2 seconds, and:
The DTC is cleared using the IPC clearing feature, or
The DTC is cleared using a scan tool.
Diagnostic Aids
An intermittent malfunction may be caused by an intermittent open or short to ground in a mirror signal circuit.
If the DTC does not reset after the code is cleared, then the problem may be intermittent. Refer to Testing for Intermittent and Poor Connections in Wiring Systems.

DTC U1064 Loss of Communications with BCM

Circuit Description
The serial data circuit is used to communicate information between each system connected to the serial data line. Each system is assigned a specific recognition code (source ID). This code is used to identify which system is communicating on the serial data line. Systems communicate with others by periodically sending messages on the serial data line. These messages contain specific information (or commands) a system requires to function properly. When a system receives a message it also learns the source ID of the system that sent it. This source ID is used to determine which system actually sent the message and for State of Health (SOH) monitoring. SOH monitoring determines if a system is unable to communicate properly. Systems periodically send a SOH message to each other containing their source ID. If a system fails to receive a SOH message back from a system that it communicates with, then a DTC identifying what system did not respond will set.

Conditions for Setting the DTC
A system sends out a (SOH) message on the serial data line to the Body Control Module (BCM), and no SOH message response was sent back.
Condition must be present for 5 seconds.
Action Taken When the DTC Sets
Stores a DTC U1064 in the system that was unable to communicate with the BCM.
The system unable to communicate with the BCM may set false DTCs and substitute default values for certain functions.
No driver warning message will be displayed for this DTC.
Conditions for Clearing the DTC
This DTC requires an ignition cycle in order to change from current to history.
A system sends out a (SOH) message on the serial data line to the BCM, and a SOH message response was sent back.
A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
Use the IPC clearing DTCs feature.
Use a scan tool.
Diagnostic Aids
If the problem is an intermittent loss of communications. Carefully inspect the serial data line and related components for the following intermittent conditions:
There is an intermittent open or short (to ground or voltage) in the serial data line.
Intermittent loss of communication with the BCM.
Damaged or loose star connector terminals.
Poor connections/terminal tension at a harness connector.
Intermittent BCM communication due to a loss of power or ground to the BCM.
Communication DTCs do not necessarily indicate a malfunction. These DTCs are only intended to aid in diagnosing an intermittent communication malfunction that is accompanied by a symptom. If the vehicle does not experience a symptom related to a communication malfunction, these DTCs can be disregarded.
If the serial data line is shorted to ground or shorted to voltage, all systems connected to the same serial data line will not be able to communicate properly. Systems capable of storing loss of communication DTCs (DTCs with the letter U as a prefix) will have these codes stored in their memory. If a DTC U1064 is stored in a system's memory, check for the same DTC stored in other systems capable of setting a DTC U1064. The IPC, RFA, LDCM and RDCM all monitor the SOH message from the BCM. If other systems have a DTC U1064 stored, check the BCM for an intermittent malfunction. If other systems do not have a DTC U1064 stored, check for an intermittent malfunction in the system that set a DTC U1064. After repairing a DTC U1064, clear all DTCs from all systems capable of storing communication DTCs.

DIC Onboard Diagnostics Show DTCs U1016, U1064 and U1096 in History #PI00043 - (Jun 19, 2002)
DIC Onboard Diagnostics Show DTCs U1016, U1064 and U1096 in History.

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Condition/Concern:
DTCs U1016, U1064 and U1096 may be present when scrolling through the onboard diagnostics via the instrument cluster Driver Information Center (DIC).

Recommendation/Instructions:
This is a normal software function as long as the DTCs have a history status upon ignition cycling. No repair attempts should be made.


Bill