Question about 2007 Hyundai Sonata Limited Sedan

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Communication link Cannot communicate with ecm ??? there is power at plug but link has nothing ??? HELP

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  • Hyundai Master
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Code readers need the correct pins to communicate to the ECM . You will have to say what the car is and what engine as there are a number of cables that can be connected .

Posted on Jan 04, 2014

Testimonial: "I have a modus ultra, when I plug it in I get the green light indicating that I have power & ground .The scanner wont communicate.I have checked fuses but cannot find which one it could be .I will check for a different cable at my shop today, Maybe I don't have the rite one on there ."

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taran_2005
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SOURCE: ECM location for 96 Hyndai Accent

Hi,

It is located just above the fuse box behind the dash at the driver footwell.


Any further help, let me know.

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Posted on May 08, 2009

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ISO9141 GMC ENVOY '08


Where are you coming up with this ?
ISO 9141 and KWP 2000 this is a communication protacoll. when the scan tool is plug into the OBD port it uses a set amount of communication dialog to communicate with the ECM, Majority of time when a scan tool can not communicate with the vehicles ECM ,

Apr 08, 2017 | 2008 GMC Envoy

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I have a 2010 Chevy impala LS instrument cluster and it has a 20 pin plug I'm trying to figure out which wire's on the back of the cluster are for the speed sensor, rpm, gas, and temp wires.


Boy your way off base . All the gauges are inputs from the ECM - engine computer . The VSS - vehicle speed sensor , ETC - engine coolant temp sensor , sending unit in the fuel tank , All this sensors input the engine computer . The PCM then sends this info on the GMLAN serial data bus ,communications network . The Instrument cluster has a microprocessor inside that translates this info an controls the gauges. You probably have an instrument cluster problem or a communication network problem . Your best bet is to take your vehicle to the dealer or some other qualified repair shop. Need to have it checked for DTC'S - diagnostic trouble codes.
Indicators and Warning Messages
Refer to Indicator/Warning Message Description and Operation.
Engine Coolant Temperature Gage
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine coolant temperature. The IPC receives the coolant temperature information via serial data message from the body control module (BCM). The engine coolant temperature gage defaults to 60?°C (140?°F) or below if:
?€¢
The ECM detects a malfunction in the engine coolant temperature sensor circuit.

?€¢
The IPC detects a loss of serial data communications with the ECM.

?€¢
The IPC detects a loss of serial data communications with the BCM.
Fuel Gage
The instrument panel cluster (IPC) displays the fuel level as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the fuel level percent. The body control module (BCM) sends the fuel level information from the ECM to the IPC via a serial data message indicating the fuel level percent. The fuel gage defaults to empty if:
?€¢
The ECM detects a malfunction in the fuel level sensor circuit.

?€¢
The IPC detects a loss of serial data communications with the ECM.

?€¢
The IPC detects a loss of serial data communications with the BCM.
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates in the IPC.
Odometer
The vehicle odometer is calculated and stored electronically in the instrument panel cluster (IPC). The IPC contains a season odometer and trip odometer A or B. Momentarily press the trip/fuel button in order to toggle between the season odometer and the trip odometer. Press the set/reset button for greater than 0.25 seconds, while the trip odometer is displayed, in order to reset the trip odometer. The IPC displays the vehicle mileage and trip mileage as determined by the engine control module (ECM). The IPC calculates the mileage based on the serial data vehicle speed information from the ECM. The odometer will display 'error' if an internal IPC memory failure is detected. The odometer displays either miles or kilometers and can be set through the customization menu in the driver information center (DIC).
PRNDL Display
The instrument panel cluster (IPC) displays the selected gear position as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the gear position. The PRNDL display blanks if:
?€¢
The ECM detects a malfunction in the transmission range switch circuit.

?€¢
The IPC detects a loss of serial data communications with the ECM.

?€¢
The IPC detects a loss of serial data communications with the body control module (BCM).
Speedometer
The instrument panel cluster (IPC) displays the vehicle speed as determined by the engine control module (ECM). The IPC calculates the mileage based on serial data vehicle speed information from the ECM. The IPC receives vehicle speed information from the body control module (BCM) via a serial data message. The speedometer defaults to 0 km/h (0 mph) if the IPC detects a loss of serial data communications with the ECM or BCM.
Tachometer
The instrument panel cluster (IPC) displays the engine speed as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine speed. The IPC receives the engine speed information from the body control module (BCM) via a serial data message. The tachometer will default to 0 RPM if:
?€¢
The ECM detects a malfunction in the engine speed sensor circuit.

?€¢
The IPC detects a loss of serial data communications with the ECM.

?€¢
The IPC detects a loss of serial data communications with the BCM.

How to Diagnose Controller Area Network CAN Suggest you read up on C.A.N.

May 14, 2016 | Cars & Trucks

1 Answer

What are the probable causes of DTCs P1603, P1604, and P1605?


OBD-II code P1603 indicates an issue with TCU communication.
There are communications that exist between the engine control module, or ECM, and the transaxle control module, or TCM. This communication is done through a control area network, or CAN. With the communication of the CAN, an independent pin and wiring is needed to receive a signal that includes sensor information from the ECM. The more information there is to communicate, the more wiring that is needed. When it comes to CAN communication, all of the information communicated is done alone control modules like the ECM and TCM using CAN lines. When there is a problem with these lines, the ECM will detect the problem and store a P1603 trouble code; the storing of the trouble code is what causes the SES or check engine light to illuminate on the dash.
Possible causes of trouble code P1603 include:
  • Faulty transaxle control module (TCM)
  • Faulty engine control module (ECM)
  • Harness running from the TCM to the ECM has a short
  • There is a poor electrical connection between the TCM and ECM
Diagnosing the exact cause of the problem should always begin with a visual inspection that could reveal bad wiring, loose connections, or damaged parts. From there, it is a matter of running down the list to determine what needs to be replaced. In general, a bad ECM will cause a loss of power, poor fuel economy, and stalling engine. While a bad TCM will have more prevalent transaxle issues like erratic shifting
P1605 and P1605
These codes are indicating a starting problem and rough idling. Code p1604 is a very vague code and diagnosing it without having a symptom is very complicated. And code p1605 is rough idling which means that the computer have noticed a rough idle situation usually this code is accompanied by other codes or if it's alone then I would suspect a fuel pressure issue. These two codes involve diagnosis and we'll need to dig into this problem deeper to find out what's causing them, Unless you are an experienced technician who need assistance then I will suggest that you take your vehicle to your local toyota dealership and they should be able to find the problem.
P1P

Feb 12, 2016 | 2011 Toyota Sienna

1 Answer

Why scan tool doesn,t connect to truck.


ecm has been replaced????? was it programmed ?

Sep 27, 2017 | 2003 Chevrolet Avalanche

1 Answer

I got a code from auto zone that is i believe UO 101 AND UO105 OR UA101 AND UA105 WHAT do these codes stand for


These codes are communications code errors:

The UO101 is a transmission communication error: poor communication to your transmission ECM / computer

The UO105 is a fuel injection communication error: Poor communication to your fuel injector ECM/ computer.

Jun 15, 2011 | 2006 Dodge Stratus

1 Answer

2008 Pontiac g6 ecm port under the dash, when code reader is plugged in it gives a link error? Any ideas what to troubleshoot


is your code reader "can" ready? the newer cars communicate to scanners using different protocols and your scanner may not have that protocol. have you scanned the vehicle using this scanner before? also check fuses as most manufacturers use the cigaret lighter fuse to power the "dlc" data link connector.

Jun 09, 2011 | Pontiac G6 Cars & Trucks

1 Answer

Jeep died while driving. Wont start. Garage said they couldnt communicate with the computer. I replaced the computer and coil. I am getting no spark. I tried the turn on / off/ on /off / on to get the...


Check the ecm fuses if they can't communicate using an obd reader then the ecu isn't getting any power different car company's label them differently but look for the ones that are labeled something like ecu, ecm, engine controller, or something like that I hope this helps

Oct 22, 2017 | 1993 Jeep Grand Cherokee

2 Answers

1996 bmw z3 323i after changing battery,turns over no spark and radio doesnt work and keyless remote doesnt. please help where is the ecm located if that could be the problem.was running fine until the...


Welcome to fixya Sorry to tell you the BMW dealer will have to reset the code do to the battery was disconnected it is an anti theft deterant system. Lee

Nov 11, 2010 | 1996 BMW Z3 Roadster

1 Answer

ECM Not communicating with my scanner


It's an OBD I system, so you can't hook up to the ECM with an OBD II scan tool. Have you made sure the ECM is getting power and ground? Have you ruled out any blown fuses, tripped circuit breakers, or blown fusible links?

Dec 27, 2008 | 1991 Toyota Pickup

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