Question about 2001 Dodge Ram 1500 Truck 2WD

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Get a no buss code what does this refer to - 2001 Dodge Ram 1500 Truck 2WD

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Go to auto zone they will explain it

Posted on Feb 03, 2010

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2007 saturn outlook code U2100


Do you know what a serial data network is ? U codes are problems associated the data buss . A module isn't communicating or the buss wiring is shorted etc.....
Data Link Communications Description and Operation

Do you know what an how many modules are on your vehicle ?

The communication among control modules is performed primarily through the GMLAN high speed serial data circuit and the GMLAN low speed serial data circuits. The modules that need real time communication are attached to the high speed GMLAN network. The body control module (BCM) is the serial data gateway between the networks. The purpose of the gateway is to translate serial data messages between the GMLAN high speed buss and the GMLAN low speed buss. The controller area network (CAN) is another serial data communication network used on this vehicle which is dedicated to the electronic brake control module (EBCM) subsystem for stabilization. Below are more detailed descriptions of the individual networks. The gateway will interact with each network according to that network's transmission protocol. Refer to Body Control System Description and Operation for more information about the gateway.

Your best bet would be to take your vehicle to a qualified repair shop .

DTC U2100 00: Controller Area Network (CAN) Bus Communication
The GMLAN serial data circuits are controller area network (CAN) serial data buses used to communicate information between the control modules. Typical data transmission speeds must be high enough to ensure that a required real-time response is maintained. On this vehicle there are 2 totally different types of GMLAN serial data circuits, the high speed 2-wire circuit and low speed single wire circuit. Refer to Data Link Communications Description and Operation for the complete description of these buses. The GMLAN serial data circuits also communicate directly to the DLC connector. Messages are interpreted by the externally connected CANdi module which acts as a transceiver for the scan tool.
Modules connected to the GMLAN serial data circuits monitor communications during normal vehicle operation, where operation information is exchanged among the modules. All the modules on the GMLAN networks, maintain a transmit error counter (TEC) and a receive error counter (REC). The counter values increase with detected errors and will decrease with error-free messages. If the TEC value exceeds 255, the controller removes itself from the network and DTC U2100 will result.

016 CAN Communications

Sep 12, 2017 | Saturn Cars & Trucks

1 Answer

2008 impala no tach signal to pcm


DTC P0651: 5-Volt Reference 2 Circuit
You have a bad sensor or a short on the five ref. circuit .
The 5-volt reference 2 buss provides 5 volts to the following sensors:
?€¢
The APP sensor 1

?€¢
The crankshaft position (CKP) sensor

?€¢
The throttle position (TP) sensor 1 and 2

?€¢
The brake booster vacuum sensor

A bad sensor or short on the five volt ref. circuit will bring down the PCM and you will have a no start . I would pull the connectors off each of these sensors listed above to see if five volt ref. comes back to five volts . Well first check five volt ref at easiest sensor to get to . watch this video , he explains better !

2006 Cadillac DTS Shorted 5v Reference Circuit

Dec 05, 2016 | Cars & Trucks

1 Answer

Where is the body control module on 2006 HHR


Body Control Module (BCM)
Under the I/P below the radio on the right side of the center console.
Do you know what the purpose of the BCM is ?
The body control module (BCM) has a bussed electrical center integrated into the housing. Body control relays and fuses are installed directly on the BCM, which simplifies wiring and junction blocks on the vehicle. The body control system consists of the BCM and its associated controls. Battery positive voltage is provided to the BCM from IBCM BATT 1 fuse and the IBCM BATT 2 fuse in the underhood fuse block. The module grounds are wired to ground G201, G203 and G305. The BCM is wired to the GMLAN High speed serial data buss, and the GMLAN Low speed serial data buss, as well as discrete input and output terminals to control the functions of the vehicle's body.
Serial Data Gateway
The body control module (BCM) in this vehicle functions as a translator between the High and Low speed GMLAN busses. The 2 communication protocols use the BCM to translate communicated serial data messages between the control modules over the 2 serial data busses.
Power Mode Master
This vehicles body control module (BCM) functions as the power mode master (PMM). Refer to Power Mode Description and Operation for a complete description of power mode functions.
Serial Data Power Mode Master
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits. The 3-wire Ignition Switch table below illustrates the state of these inputs in correspondence to the ignition switch position:
Relay Controlled Power Mode
The body control module (BCM) uses the discrete ignition switch inputs Off/Run/Crank, Accessory, and ignition 1, to distinguish the correct power mode. The ignition 1 circuit is also routed to the Run/Crank relay for relay controlled power feeds during the appropriate power mode. The BCM, after determining the desired power mode, will activate the appropriate relays for that power mode.
Reprogram the body control module (BCM) after replacement. Refer to Control Module References .




Do you

Sep 24, 2015 | Cars & Trucks

2 Answers

My 2003 chevy pickup starts up then stops running almost instantly and will not run it has a 4'3 engine and has a dtc p0651 code in it could you tell me how to fix the problem?


You have a short on PCM - powertrain control module , 5volt reference circuit . This will surely make the vehicle not keep running !
The powertrain control module (PCM) provides 5 volts to the following sensors:
?€¢
The air conditioning (A/C) pressure sensor


?€¢
The fuel tank pressure (FTP) sensor, if equipped

These 5-volt reference circuits are independent of each other outside the PCM, but are bussed together inside the PCM. Therefore a circuit condition on one sensor 5-volt reference circuit may affect the other sensor 5-volt reference circuits. The PCM monitors the voltage on the 5-volt reference circuit. If the PCM detects that the voltage is out of tolerance, DTC P0651 sets.

Aug 30, 2015 | Cars & Trucks

1 Answer

Code u1411 jeep liberty 2006


wow , no engine options stated, or type of driveline.... wow.
this is covered in the FSM, read that.
it states
U1411-Implausible Fuel Volume Signal Received that means to get the car fully scanned,
using a real scan tool that sees all 2006, jeep DTC errors.
including BCM codes.
the manual tells you what to do.

here is just small expert from the Factory.serv.manual

quote
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)(Refer To List 1).
Theory of Operation
The BCM has to send the PCM a fuel volume signal over CAN C. The signal the BCM sends over CAN C is implausible.
Diagnostic Test
1. ACTIVE DTC
Ignition on, engine not running.
With a scan tool read DTCs.
Is the DTC active at this time?
Yes
  • Go To 2
No
Refer To List: 2. CAN C BUS DTCS ALSO ACTIVE
With a scan tool check for DTCs in the BCM.
Are any CAN C related DTCs active at this time?
Yes
  • (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the appropriate diagnostic procedures.
  • Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
--------------------------------------------------------------------------------------------
that word CAN , means the vehicle network communications buss called CAN.
if the PCM can not TALK to the BCM. this can cause the
data to be wrong. and the
Implausible , data.
greek ,huh,
get it serviced by any ASE shop in town or if desperate JEEP.

Oct 03, 2014 | 2006 Jeep Liberty

1 Answer

Location of fuelpumpfuseon2003jeepliberty


Use the manual as reference..do you have it..or if the bussed electrical center module of your car has a top cover, normally fuse assignment are there to see..

May 29, 2014 | 2003 Jeep Liberty

1 Answer

Chevy colorado


Hi there:

DTC P0641 - 5-Volt Reference 1 Circuit

DTC P0651 - 5-Volt Reference 2 Circuit

Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description
The engine control module (ECM) has 2 internal 5-volt reference busses called 5-volt reference 1 and 5-volt reference 2. Each reference bus provides 5-volt reference circuits for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to that reference bus. The ECM monitors the voltage on the 5-volt reference busses.

The 5-volt reference 1 bus provides 5 volts to the following sensors:
* The manifold absolute pressure (MAP) sensor
* The fuel tank pressure (FTP) sensor
* The air conditioning (A/C) refrigerant pressure sensor
* The accelerator pedal position (APP) sensor 2
* The intake camshaft position (CMP) sensor

The 5-volt reference 2 bus provides 5 volts to the following sensors:
* The APP sensor 1
* The throttle position (TP) sensor 1 and 2
* The crankshaft position (CKP) sensor

Conditions for Running the DTC
* DTCs P0601, P0602, P0603, P0604, P0605, P0606, P0607, and P2610 are not set.
* The ignition is in Unlock, Accessory, Run, or Crank.
* The ignition voltage is more than 5.23 volts.
* DTCs P0641 and P0651 run continuously when the above conditions are met.

Conditions for Setting the DTC
The ECM detects a voltage out of tolerance condition on the 5-volt reference 1 or 2 bus for more than 0.5 second.

Action Taken When the DTC Sets
DTCs P0641 and P0651 are Type A DTCs.

Conditions for Clearing the MIL/DTC
DTCs P0641 and P0651 are Type A DTCs.

Diagnostic Aids
It may be possible to locate the fault by disconnecting one component at a time from the 5-volt reference circuit while viewing the 5-Volt Reference circuit parameter on the scan tool. The scan tool parameter would change from Fault to OK when the source of the fault is disconnected.

If all 5-volt reference components have been disconnected and a Fault is still indicated, the fault may exist in the wiring harness.

Circuit/System Verification
With the ignition ON and the engine OFF, observe the 5-volt Reference 1 and 2 parameters. The scan tool should display 4.3-4.7 volts for a normally operating system.

Circuit/System Testing
Important: Additional DTCs will set when disconnecting the components.

1. Ignition OFF, disconnect the harness connector of all appropriate sensors for the applicable DTC.

Important: A short to voltage on the signal circuit of certain components may cause this DTC to set.

2. Ignition ON, measure for 4.8-5.2 volts between one of the 5-volt reference circuits and ground.

* If the voltage is less than the specified value, test for a short to ground on all the 5-volt reference circuits. If all circuits test normal, replace the control module.
* If the voltage is greater than the specified value, test for a short to voltage on all the 5-volt reference circuits, or the signal circuit, for each component associated with the appropriate 5-volt reference circuit. If all circuits test normal, replace the control module.

3. Connect each component associated with the 5-volt reference circuit, one at a time, while monitoring the voltage. The voltage should not change more than 1 volt.

* If the voltage display changes more than the specified value when a component is connected, replace the component.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 12, 2012 | Chevrolet Colorado Cars & Trucks

1 Answer

I have a 2008 Chevy Cobalt (piece of crap). I loved it at first but now I absolutely hate it. For a couple months now it has been going nuts. It will start dinging and all the gauge needles including mph,...


Have you had all the moduels check for code's ? Not autozone or anywhere else like that . Need professional type . Could have a GMLAN serial data network problem . All the control modules on the vehicle , PCM/ECM , BCM , instrument cluster , radio , air bag's , ABS , electric power steering etc... all share information on the data network . GMLAN is GM'S version of C.A.N. - controller area network . How to Diagnose Controller Area Network CAN Checking for communication problem codes is the first thing to do with problems like you are having . Have you taken it to a Chevy dealer ? This does sound like a data network problem .

The communication among control modules is performed through the GMLAN high speed serial data circuit and the GMLAN low speed serial data circuit. The modules that need real time communication are attached to the high speed GMLAN network. The body control module (BCM) is the gateway between the networks. The purpose of the gateway is to translate serial data messages between the GMLAN high speed buss and the GMLAN low speed buss. The gateway will interact with each network according to that network's transmission protocol. Refer to Body Control System Description and Operation for more information about the gateway.
The powertrain control module (PCM) on this vehicle, uses a class 2 serial data buss. The class 2 buss is only used for diagnostics and the service programming system (SPS). During normal vehicle operations, there is no communications over the class 2 serial data buss. Normal vehicle operational messaging for the PCM is sent over the PCMs GMLAN high speed serial data buss.


Could be a simple fix , i see them all the time . Lose ground wire for one of the modules . That includes the instrument cluster , it also has a microprocessor inside an can set DTC'S -diagnostic trouble codes . Finding a U code in one of the modules would shorten diagnostic time .

Feb 28, 2017 | 2008 Chevrolet Cobalt

1 Answer

Code po 652


P0652 DODGE - 5 Volt Sensor Reference 2 Circuit Low
These 5-volt reference circuits are independent of each other outside the PCM, but are bussed together inside the Engine Control Module (ECM). Therefore a circuit condition on one sensor 5-volt reference circuit may affect the other sensor 5-volt reference circuits. The ECM monitors the voltage on the 5-volt reference circuit.

Possible causes
- Shorted sensor
- Shorted sensor circuit
- Failed ECM

When is the code detected? The ECM has detected an out of voltage range on the 5 volt reference circuit 2.

Hope helps.

Dec 02, 2011 | 2007 Dodge Sprinter

1 Answer

The codes that show up are u 1096 1301 1016 1064 1162 1088 1160 1161 and 1041 how to fix


These codes indicate a loss of communications over the busses that talk to numerous devices. Troubleshooting of this will require someone familiar with comm busses.

Oct 08, 2010 | 2004 GMC Envoy

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