Question about 2003 Saturn ION

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No OBD Communications

I recently went to get my emissions check, and I failed because they said the OBD was not communicating. There were no fault codes, in fact there was no 12V detection whatsoever. The port is completely dead. What could cause this? Is there a relay or fuse that may be bad? Or is this going to be a costly electrical issue?

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  • myocom08 Feb 25, 2009

    One of the cigar lighers is blown (there are 2). We'll check that!

  • myocom08 Feb 25, 2009

    The lighter fuse is definately burned out. Hopefully that will fix the problem. (How seemingly unrelated... ??)

  • myocom08 Feb 26, 2009

    WOW! Well I can't believe it, but it worked! Thank you very much everyone!!! We replaced the fuse and had AutoZone run the codes and it worked!!

  • yadayada
    yadayada May 11, 2010

    does the cigar lighter work? if not the fuse is blown, this is the fuse that powers the OBD 2 connector also.

  • Daniel
    Daniel Mar 19, 2013

    same problem with '97 ford T-bird replaced the fuse, but still not connectivity.

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  • 65 Answers

Only one fuse burn make this problem

Posted on Feb 25, 2009

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  • Saturn Master
  • 70,387 Answers

That should do it, they use the lighter circuit because it is always hot.

Posted on Feb 25, 2009

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Posted on Jan 02, 2017

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1 Answer

Good day, why craftsman diagnostic scanner show 'communication error' whenever it's scanner Nissan vehicles


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May 21, 2008 - computer alerts motorists of problems with the vehicle's emission control ... tampered with and the connection to the on-board diagnostic (OBD) ... itspower from the same circuit as the cigarette lighter. ... scan tool, connected to the data link connector (DLC) under the dash, not ... General Program Questions.Missing: craftsman ‎whenever

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OBDII ABS and Airbag. Scan Tool. Model 39853 .... OBD II Diagnostic Trouble Codes (DTCs) . .... Program Mode . .... Error Messages . ... Vehicle Communication Fault ...... No warranty (expressed or implied) can be made for its accuracy or completeness... Go to www.actron.com/craftsman to download the Scanning Suite.

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1 Answer

Iso9141 what does it mean ?


https://weber.instructure.com/courses/181471/pages/iso-9141

It is a communications protocol typically used to communicate between your car and an OBD machine (On Board Diagnostics), which can read faults on your car.

Nov 16, 2015 | 2007 Hyundai Elantra 2.0

1 Answer

I have multiple codes instrument cluster codes: u1073, u1262, u1059, u1123, u1041; ABS/TCS codes: u1073, u1262, C1805, B2900;


Did you change any modules on the vehicle ?
B2900 VIN Mismatched ABS Module VERIFY that the module has the correct as-built data.
CHECK for correct powertrain control module (PCM) and ABS module configuration using the diagnostic tool. RECONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to Section 303-01A or Section 303-01B for the PCM. CLEAR the DTC. REPEAT the C1805 Mismatched PCM and/or ABS/TC Module ABS Module CHECK for correct PCM and ABS module configuration using the diagnostic tool. RECONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to Section 303-01A or Section 303-01B for the PCM. CLEAR the DTC. REPEAT the self-test. U1073 SCP (J1850) Invalid or Missing Data for Engine Coolant PCM REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. U1262 SCP (J1850) Communication Bus Fault Network Fault REFER to Section 418-00 . Can a scan tool communicate with all the modules on the vehicle ?
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  • Circuit or connection in the standard corporate protocol (SCP) network.
  • ABS module.
  • Go To Pinpoint Test A .
U1123 Invalid or Missing Data For Odometer Instrument Cluster Go To Pinpoint Test G . U1059 SCP (J1850) Invalid or Missing Data for Transmission/Transaxle/PRNDL PCM REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. U1041 SCP (J1850) Invalid Or Missing Data For Vehicle Speed Instrument Cluster REFER to Section 413-01 . U1041 SCP (J1850) Invalid Or Missing Data For Vehicle Speed Tire Pressure Monitoring System Module REFER to Section 204-04 . You need to take it to the dealer , not a transmission shop. Your vehicle could have a ground issue , could have power issue , could have a control module issue . It needs to be hooked up to the factory scan tool ! It is for sure it has a communication problem on the SCP data bus , do you know what serial data communication is ?
The vehicle has 3 module communication networks:
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  • the international standards organization (ISO) 9141 communications network
  • the universal asynchronous receiver-transmitter (UART) based protocol (UBP) communications network
The diagnostic tool connects to all 3 networks through the data link connector (DLC). This makes diagnosis and testing of these systems easier by allowing one diagnostic tester to be able to diagnose and control any module on the 3 networks from one connector. The DLC can be found under the instrument panel between the steering column and the radio.
The SCP communications network will remain operational even with the severing of one of the bus wires. Communications will also continue if one of the bus wires is shorted to ground or voltage, or if some but not all termination resistors are lost. The SCP communications network allows inter-module communication.
The ISO 9141 communications network does not permit intermodule communication. When the diagnostic tool communicates to modules on the ISO 9141 communication network, the diagnostic tool must request all information, or initiate module commands.
The ISO 9141 communications network will not function if the wire is shorted to ground or battery voltage. Also, if one of the modules on the ISO 9141 communications network loses power or shorts internally, communications to that module will fail.
The UBP communications network will not function if the wire is shorted to ground or voltage. The UBP is different from the ISO communication network in that it allows intermodule communication.

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2 Answers

I got a code p0446 and u1153 what is wrong


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1 Answer

What causes obd code u110c


Read this please:

The BCM then puts the fuel level info out on the communications bus for interested modules. The PCM isn't getting the message and is turning on the MIL and setting a 'lack of communication' fault code (U110C).

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1 Answer

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1 Answer

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1 Answer

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1 Answer

What is the OBD 2004 satern ion.An why wuuld that fail emission with no dash lights on.


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1 Answer

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