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Power at obd2 connector but no communication - 2004 Chevrolet Impala

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2004 Suzuki Verona 2.5 data link connector wiring diagram no pcm communication


Hello just a guess here but by any chance is the lighter still working check for a blown fuse i have had this problem in the past and have traced it back to a fuse to the lighter or something crazy like that and as soon as i fixed this then i got communication back to the PCM. They run the power for the OBD connector off of other thing in the car

Dec 14, 2016 | 2004 Suzuki Verona

2 Answers

My 95 s10 has a obd2 plug And a obd1 you ecm how do I scan codes


try the obd1 connector to see it communicates. if not try the other one. some of the GMs didn`t use the obd2 connector in 94 until later on other models.

Aug 22, 2015 | Cars & Trucks

1 Answer

The OBD2 is not communicating with scanners or Verus what do I do?


i once found that the 12volt accessory fuse is blown. its was also the same one for the ECU thats the reason it does not connect

Mar 06, 2015 | 2002 Nissan Maxima SE

1 Answer

I failed smog because of obd2 connector has no communication how do i trace the no power on obd2 connector?


i dont now much about obd2 tool, but you can ask the 24 hrs live technical support http://www.diyobd2.fr/service/, they will like to help you, good luck

Sep 14, 2013 | 2001 Buick LeSabre

1 Answer

I have a 2008 ford fusion and it failed inspection because they could not get any readings for the emission test. It is not communicating at all what can I do to fix this problem?


Check your fuses and replace any that are blown. Usually the cigarette lighter fuse also powers the DLC (data link connector) with this fuse blown the scan tools can not communicate with the OBD2 system.

Feb 20, 2013 | Cars & Trucks

1 Answer

97 buick century has no data from OBD2 scanner.


The protocol is class 2 . Maybe your code reader is no good .
012 GM Class II Communications

Data Link Connector (DLC)
The data link connector (DLC) contains the following serial data links:
• Class II
• Entertainment and Comfort (E&C)
The DLC also provides a power source for the scan tool as follows:
• Unswitched voltage (B+) at DLC terminal 16 (circuit 1450)
• Ground at terminal 4 (circuit 1450) and terminal 5 (circuit 1550)

Class II Serial Data Link
The class II serial data link allows the following modules to communicate data with each other:
• Body control module (BCM)
• Electronic brake traction control module (EBTCM)
• Heater-A/C control (if equipped with RPO CJ2)
• Instrument panel cluster (IPC)
• Powertrain control module (PCM)
• Inflatable Restraint Sensing and Diagnostic Module (SDM).
The Class II serial data link allows a Scan Tool scan tool to communicate with the above modules for diagnostic and testing purposes. The Class II serial data link is located at the DLC connector terminal 2. Terminal 2 consists of the following circuits:
• Circuit 1036
• Circuit 1037
• Circuit 1128
• Circuit 1049
• Circuit 1122
• Circuit 1132
Entertainment and Comfort (E&C) Serial Data Link
The entertainment and comfort (E&C) serial data link allows a scan tool to communicate with the radio or the mobile telephone handset the remote CD player (if equipped). This communication is for diagnostic and testing purposes. The E&C serial data link is located at the DLC connector terminal 14, circuit 835.
PIN #9 goes to the air bag module .

Aug 04, 2017 | 1997 Buick Century

1 Answer

Failed illinois emission test for no communication. Car will communicate with our snap-on solus pro. Any ideas?


Well first check for power to obd2 connector, the next thing i've seen alot off is a worn connector some of these testing places have worn hook up connectors tell them to try to hold plug in place with a little force but also make sure all the fuses are good , If your scan tool works then theres should also,

Jul 04, 2010 | 2002 Daewoo Nubira

1 Answer

Unable to communicat to the OBD2 for a 1999 Nissan Altima


Up to 99 or 2000 model maxima's arent OBD II. There is a OBD I connector located behind the fuse box cover inside the car. It is a grey connector.

May 12, 2009 | 1999 Nissan Altima

1 Answer

Computer connection - codes?


in 1993, the computer systems were obd 1. which generally needed battery power to run scanner. 1996 up is obd2 and powers up scanner through data connector. not sure what kind of scanner you have. is it powering up ok and not communicating or cant get scanner to turn on?

Oct 16, 2008 | 1993 Buick LeSabre

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