Question about 1997 Honda Accord

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Check engine light is on and i can't find the serial port to troubleshoot it

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It's behind your ashtray, dude. Pull the ashtray out towards the shifter

Posted on Sep 09, 2008

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I have a 2007 cadillac cts with a no crank no start problem. The TC light is on as well as the theft protection light and the check engine light, but it will not say anything. What could be the pro?


It won't talk to you ? explain that . Is the battery an cable connections good ? Do the headlamps shine bright ? Does the theft light flash when trying to start the vehicle ? Do you know how complex your vehicle is ? The number of control module's on the vehicle , what GMLAN serial data communications are ? What happens when you turn the key to start ? The ignition switch is a low voltage input to the BCM - body control module system , the BCM turns on relays an sends messages to other modules to start the vehicle , turn thing's on etc... Why the GMLAN
The body control system consists of the following 2 modules:
?€¢
The dash integration module (DIM)


?€¢
The rear integration module (RIM)

Each of the 2 body control modules integrate a number of functional systems. Each module is connected to the class 2 serial data circuit, many of the control signals are implemented by class 2 messages.
Dash Integration Module (DIM)
The various dash integration module (DIM) input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
?€¢
The cigar lighter relay control


?€¢
The class 2 communication requiring DIM interaction


?€¢
The exterior lighting control


?€¢
The headlamp washer control


?€¢
The hood ajar switch input w/export


?€¢
The horn relay control


?€¢
The interior lighting control


?€¢
The load management


Serial Data Messages The modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid PMM message until they can check for the engine run flag status on the serial data circuits. If the PMM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is True, indicating that the engine is running, the modules fail-safe to RUN. In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is False, indicating that the engine is not running, the modules fail-safe to OFF-AWAKE. In this state, the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Discrete Ignition Signals Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid PMM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, battery positive voltage, the modules will fail-safe to the RUN power mode. If the discrete ignition input is not active, open, or 0 voltage, the modules will fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
I'd say your best bet is take your vehicle to the dealer or some other qualified repair shop .

Sep 22, 2016 | 2007 Cadillac CTS

1 Answer

Fixes for non-communicating OBD II port and nonworking trunk release button on driver door panel?


What pins did your friend jump in the DLC ,2 an 4 ? they don't call it ALDL any more ! Does the vehicle start an run ?
The data link connector (DLC) is a standardized 16 cavity connector. Connector design and location is dictated by an industry wide standard, and is required to provide the following:
?€¢
Scan tool power battery positive voltage at terminal 16.


?€¢
Scan tool power ground at terminal 4.


?€¢
Common signal ground at terminal 5.


?€¢
Class 2 signal at terminal 2.


I wonder how many friends out there mess up other friends vehicles from stuff they see on the internet . When are you people going to learn , your messing with complex electronics !!!!! He shorted out the class 2 serial data communication network !
Do you know what this is ? if not you need to take to your local GM Mr. goodwrench !
Class 2 Serial Data Link
The data link is configured as a ring with discrete lines entering and leaving each module. This allows communications to the modules on the ring if one of the two discrete circuits is open.
A total list of the control modules on the Class 2 Serial Data Line can include the following:
?€¢
Dash Integration Module (DIM)


?€¢
Driver Door Module (DDM)


?€¢
Electronic Brake Control Module (EBCM)


?€¢
Head Up Display (HUD) w/UV6


?€¢
HVAC Control Module w/C67


?€¢
Inflatable Restraint Sensing and Diagnostic Module (SDM)


?€¢
Instrument Panel Cluster (IPC)


?€¢
Instrument Panel Integration Module (IPM) w/CJ2


?€¢
Memory Seat Module (MSM) w/A45


?€¢
Powertrain Control Module (PCM)


?€¢
Radio


?€¢
Rear Integration Module (RIM)


?€¢
Remote Control Door Lock Receiver (RCDLR)


?€¢
Remote Playback Device - CD Changer w/U1S


?€¢
Theft Deterrent Control Module


?€¢
Vehicle Interface Unit (VIU) w/UE1


Power door serial data does not communicate with the scan tool via the DLC. Power door serial data information is interpreted by the driver door module (DDM) and transmitted on the Class 2 data link by the DDM.
Power door serial data is used for serial data communication between the four door modules as well as the driver door switch assembly (DDSA
Scan Tool Does Not Communicate with Class 2 Device
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. Connecting a scan tool to the DLC allows communication with the modules for diagnostic purposes.
The engine will not start when there is a total malfunction of the class 2 serial data circuit while the engine is not running.
Test Description
The numbers below refer to the step numbers on the diagnostic table.

  1. A partial malfunction in the class 2 serial data circuit uses a different procedure from a total malfunction of the class 2 serial data circuit.

  2. The DTC U1300, U1301, and U1305 may be retrieved with a history status. These DTCs are not the cause of the present condition.

  3. A State of Health DTC with a history status may be present along with a U1000 or a U1255 with a current status. This indicates that the malfunction occurred when the ignition was on.

Apr 22, 2015 | 2001 Buick LeSabre

2 Answers

Not sure why the check engine port has no power,looking for a blown fuse


On GM it's part of the cigarette lighter circuit, check that fuse.
If not just get a test light, ground it to a good ground, turn the key to the on position, then use the test light to touch both exposed terminals on each fuse, test light should light on both sides of each fuse, if it only lights on one side, then that fuse is blown. This saves the trouble of pulling each fuse out to inspect it. Good luck.

Mar 02, 2015 | 1996 Ford Windstar

3 Answers

How to check what codes are making check engine light to come on 95 toyota


some auto parts stores will check the codes for free so I have heard

Feb 17, 2014 | 2002 Toyota Tacoma

1 Answer

Where can i find the engine number for my landrover freelander


The serial number is stamped on a cast pad on the cylinder block. Look on the left side of the engine between the two center exhaust ports (numbers 3 and 5). There you will find the engine serial number. The engine compression ratio is also stamped above the serial number.
9_14_2012_7_01_01_pm.jpg

Sep 14, 2012 | Cars & Trucks

1 Answer

Ford Escort P1405 Error Code


Are you sure you have EGR flow?? Hold the EGR valve open the engine should run poorly, if not you have no flow.

May 31, 2012 | 1998 Ford Escort

2 Answers

Check engine light comes on for 2004 Hyundai Sante Fe. O2 sensor was replaced but still has the problem. Does the EGR manifold tend to get clogged up on the Sante Fe? I fixed a Honda Civic check engine...


First of all, why was the O2 snsr replaced?... Check Engine light? What DTC (diagnostic trouble code) did you find stored in the ECU (Engine Control Unit)? The drivability you seem to be describing can have multiple causes -- faulty sensors, malfunctioning computer, clogged catalytic converter, leaky injectors, vacuum leaks, etc.

Ok... this is gonna take some time. The 04 Santa Fe came with 3 (three) different/possible engines -- the 4 Cylinder 2.4 lit, the 2.7 V6, and the 3.5 V6. Only the 2.4 (4 cyl) and the 3.5 V6 are equipped with EGR. The 2.7 does NOT have EGR. To answer part of your question, the EGR system on the 4 Cyl is known to develop restriction(s) in the EGR port (from the # 4 cylinder exhaust port to the EGR valve at the intake manifold). This port travels through the head (front to rear, i.e., Left to Right when viewing the engine from the transmission end). This port cannot be seen at the # 4 cylinder exhaust port unless you remove the exhaust manifold.

It would be very helpful if you could provide more detailed/specific information regarding the drivability issue & what/which codes were found related to the Check Engine light.

Feb 12, 2011 | 2004 Hyundai Santa Fe

1 Answer

Code 1529keep coming up no drveable problems


If the code you are mentioning is p1529 then it is generated by Transmission control module(TCM) to the trigger the check engine light . You have to check the code of your OBD port by using an scan tool that would give you the exact error codes from which the faulty part can be identified.

Check engine light will be triggered in case of any fault in any part in the car.Even a loose gas cap will trigger the check engine light. So having it scanned with an code reader connected to OBD port will help you to identify the exact fault.

Dec 01, 2010 | 2001 Hyundai Elantra

1 Answer

2002 yukon xl no power check engine light


FROM: LustyKid

Denalis are famous for clogged fuel filters. Change the fuel filter first and see what happens, Get the code for the check engine light. It could be you have a clogged EGR ports. Remove EGR valve and clean out the ports, replace with new gasket and see what happens. Advise of results.

Sep 03, 2008 | 2002 GMC Yukon XL

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