why dose my fix engine light gone on and off? when i have my truck put on scanner they tell me it is codes U1026 and U1064 and that means communication prombles? where are the cables located at so i can see if they are unplugged?why dose my fix engine light gone on and off? when i have my truck put on scanner they tell me it is codes U1026 and U1064 and that means communication prombles? where are the cables located at so i can see if they are unplugged?
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What is code U1064. ... The code U1064 is a loss of communications with DIM, usually caused by loss of power to the Body Control Module. It can be caused by an ignition switch going bad or loose battery connections
DTC P1516
Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
DTC P1518
Throttle Actuator Control (TAC) Module Serial Data Circuit
DTC P0120
Throttle Position (TP) Sensor 1 Circuit
DTC P0220
Throttle Position (TP) Sensor 2 Circuit
DTC P0336
Crankshaft Position (CKP) Sensor Performance
DTC P0463
Fuel Level Sensor Circuit High Voltage
DTC U1001-U1254
Loss of Communications
Use new parts not used . What would be better - take it to a qualified repair shop.
U1000 means modules on the data line have stopped seeing communication with a module. U1064 is a communication code for the BCM. It may be faulty or not communicating for some reason. If it has been changed it needs to be programmed.
the c0899 is a low battery voltage and the u1064 means communication is lost with the bBody Control Module. The u1026 is also a communication problem and the p0449 is an emissions problem, around the venting of the fuel tank. Sounds like several different unrelated problems.
As previous post stated you may have data cable unhooked somewhere. B0040- Second Row Right Frontal Stage 2 Deployment Control (Subfault) B0099- Right Frontal Restraints Sensor 2 (subfault) U1026- Loss of Active Transfer Case Control Module Communications. U1064- I do not have a listing for that code on hand. May be able to obtain it when I get to my shop tomorrow.
U1064 Lost Communication With Body Control Module (BCM)
U1000 Class 2 Data Link Malfunction
Do your door locks, power windows, etc. still work? I'm assuming this is for a Pontiac since that is the picture that comes up with your question. I'm still getting used to this new site.
U1064 - Loss of Communications with DIM (Dash Integration Module) Here is some TSB
Refer to Data Link Connector (DLC) Schematics
Circuit Description
The class 2 serial data line communicates information between modules.
Each module connected to the serial data line is assigned a recognition
code, or address. This code is used in order to identify which modules
are communicating. Modules communicate with each other by periodically
sending state of health (SOH) messages. When the ignition switch is in
RUN, each module communicating on the serial data line sends a SOH
message every 2 seconds. This ensures that the system is operating
properly. When the dash integration module (DIM) stops communicating on
the class 2 serial data line, the SOH that is normally sent on the
serial data line every 2 seconds disappears. The module, which expects
to receive that message, detects the absence of the message. The module
in turn sets DTC U1064 associated with the loss of SOH of the DIM.
Conditions for Setting the DTC
The module does not receive a state of health (SOH) message back from
the DIM. The module retries the request 3 times, and then sets DTC
U1064.
This DTC only sets if U1300 or U1301 is not current.
Action Taken When the DTC Sets
DTC U1064 is stored in the module.
The module uses the default values for the initialization data. This DTC does not cause driver warning message to appear.
Conditions for Clearing the DTC
This DTC clears (status changes from current to history) under any of the following conditions:
The module detects a state of health message from the DIM.
At each ignition cycle.
A history DTC clears after 50 consecutive ignition cycles if the conditions for setting the DTC are no longer present.
Current and history DTCs may be cleared using a scan tool.
Diagnostic Aids
DTC U1064 does not normally represent a failure within the module.
When loss of class 2 serial data communication DTCs (DTCs with the
letter U as the prefix) are stored as history DTCs, know all possible
serial data DTCs set in each module before diagnosing the serial data
line.
If U1064 is stored in the module memory, inspect for the same DTC stored in other modules capable of storing this DTC.
If the DTC is a history DTC, the problem may be intermittent.
Test Description: The numbers below refer to the step numbers on the diagnostic table:
U1064 is the result of loss of communication with the dash integration
module (DIM). Note that other modules on the class 2 serial data line
may also set U1064 if the DIM is not communicating with the serial data
line.
Clear all DTCs after the repair procedure is complete.
Step
Action
Value(s)
Yes
No
1
Did you perform the Data Link Communications Diagnostic System Check?
--
Go to Step 2
Go to Diagnostic System Check - Data Link Communications
2
Use a scan tool in order to attempt the establish communication with the dash integration module (DIM).
Does the scan tool communicate with the DIM?
--
Go to Step 3
Go to Diagnostic System Check - Body Control System in Body Control System.
3
Inspect and repair the class 2 serial data line CKT 1807 (PPL) for
intermittent connections. Refer to Intermittents and Poor Connections
Diagnosis in Wiring Systems.
Is the repair complete?
--
Go to Step 4
--
4
Turn off the ignition switch.
Reconnect or install any connectors or components that were disconnected or removed.
Turn on the ignition switch.
Clear any DTCs.
Is the repair complete?
U1096 - Loss of Communications with IPC
The computers on the Chevy require a certain voltage to operate and if the
voltage drops below a preset limit then it will tripper a loss of
communication with the other modules, this drop in voltage happens when
the car is started and the draw on the starter uses a large amount of
amperage. I suggest to check power/ground in the instrument cluster and if good do a resistance test on Data wire.
If your car is not experincing any messages like "service vehicle soon"
and no warning lights are illuminating then disregard these codes.
why dose my fix engine light gone on and off? when i have my truck put on scanner they tell me it is codes U1026 and U1064 and that means communication prombles? where are the cables located at so i can see if they are unplugged?
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