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Location of Diagnostic Connector in 1999 Honda Accord 1.6 16V

yaaro 77441 24
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Where is the diagnostic connector located on a 1999 Honda Accord 1.6 16V?

The diagnostic connector is under the passenger-side footwell carpet, next to the center tunnel, under the dashboard area [#5247117][#5247522] On this Accord there may be a 16-pin opening with no plug, while the actual connectors can be a 2-pin one for SRS and a nearby 5-pin one for ABS; the engine/PGMFI diagnostics are done from the relevant connector there [#5247905][#5248945]
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  • #1 5246511
    yaaro
    Level 33  
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    After 20 minutes of searching I gave up where to look for him ?????

    Regards
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  • #2 5246659
    viper555
    Level 39  
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    It should be under the dashboard
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    #3 5247117
    apcgassystem
    Level 16  
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    You searched under the passenger side carpet on the inside / i.e. next to the tunnel, where the heater and not at the door /? It should be EURO but it can also be 2-pin
    Greetings
  • #4 5247419
    yaaro
    Level 33  
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    viper555 wrote:
    It should be under the dashboard


    I know better to say that in the car :)
  • Helpful post
    #5 5247502
    viper555
    Level 39  
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    I meant it, but how is it not that
    Location of Diagnostic Connector in 1999 Honda Accord 1.6 16V
  • #6 5247522
    andrzej1982
    Level 18  
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    as apcgassystem wrote, from the passenger's leg side under the rug in the center tunnel
  • #7 5247905
    yaaro
    Level 33  
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    andrzej1982 wrote:
    as apcgassystem wrote, from the side of the passenger's legs under the rug in the center tunnel


    The 16-pin hole has a cut out, but no plug. There is a 2-pin one, only how to diagnose AIRBAG and ABS on it
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  • Helpful post
    #8 5247933
    adam7009

    Level 41  
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    There is probably only a K and L line
    Company Account:
    AUTO-ELELEKTRONIK AB
    Linowiec, Lisewo, 86-230 | Tel.: 697XXXXXX (Show)
  • #9 5247994
    monrant
    Level 22  
    Posts: 479
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    It depends exactly which year, if it is the third generation (up to 1999), then the SRS diagnosis connector is also here:
    Location of Diagnostic Connector in 1999 Honda Accord 1.6 16V

    As for the diagnosis, it consists in operating a jumper, simple security systems, described in detail on the "Autoelektroniki" board, and I recommend this board to everyone. It is not expensive and it pays to buy it legally.
  • #10 5248945
    apcgassystem
    Level 16  
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    You will not diagnose ABS with this connector. Only diagnostic procedures for the PGMFI controller can be performed. For the diagnosis of SRS there is a 2-pin cube as shown in the picture above, while for ABS you need to look for the 5-pin connector next to it.
    Greetings
  • #11 5249962
    yaaro
    Level 33  
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    Dice found now, how to use them, tomorrow I will get a car at 16 to cancer, I'll play.
    There is one cube with 2 pins and the one with 5 from ABS, but how to diagnose it ????
    Anyone have any descriptions ??
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    #12 5249984
    monrant
    Level 22  
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    materialy poszly na PW
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  • #13 5254191
    yaaro
    Level 33  
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    The topic is mastered with error 52, i.e. the ABS pump
    Many thanks for the info.

    Regards
  • #14 5428988
    Longi2121
    Level 10  
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    and you may have a table of abs fault codes because I can not find it anywhere :|



    greetings and plots
  • #15 5429053
    yaaro
    Level 33  
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    Please
    Attachments:
    • Location of Diagnostic Connector in 1999 Honda Accord 1.6 16V honda.JPG (63.3 KB) You must be logged in to download this attachment.
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  • #16 5429775
    Longi2121
    Level 10  
    Posts: 39
    Rate: 5
    aha plot
    Only that I have accord 96 and I have this instruction downloaded from the net and I have something like the main code and additional code after the jumper, and in this table that I have there is no such thing that will be flashed out, i.e. the main code is 1 and the additional 7 and what now????
  • #17 5431513
    Longi2121
    Level 10  
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    Rate: 5
    ok figured it out thanks for everyone

    GREETINGS :)
  • #18 5530958
    jc777
    Level 1  
    Posts: 1
    Hello
    I have a problem with ABS in Honda Accord 1.8 2001. I decided to connect to this thread as the closest to my problem. So what's the point:
    1. ABS does not work, the indicator light is on all the time.
    2. After the diagnosis (on the 5-pin connector), the code 11 was displayed, suspected damage to the right front sensor. Measurement of the sensor with an ohmmeter showed no damage (about 1600 ohms, a similar value on the left front sensor). The wires, connections, ring cleanliness were also checked, everything ok.
    3. However, I replaced the sensor (right front) with a second one, 100% functional, but it did not bring any changes, the ABS still does not work, the indicator light is on all the time, the diagnostics continues to show code 11.
    4. The problem is also deleting errors, specifically error 11. None of the known (described on the forum) ways I was able to delete error 11. Any other error (forced by me, e.g. by unplugging another sensor), shown by diagnostics, it could be erased (by turning the ignition on / off about 20 times), but error 11 is still in the memory, even after replacing the sensor with 100% functional. What to do?
    If someone would be able to help me somehow, I would be very grateful.
    Kisses
    JC
  • #19 6147190
    PKi
    Level 21  
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    jc777, were you able to fix the problem?
  • #20 6979873
    Ici
    Level 12  
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    Returning to the topic of the 5pin diagnostic connector.
    Shortening the 1st and 3rd check engine is walrus?
    And the other 3 pins? 2, 4, 5?
    Is the K line among them? If so, which pin?
    Thanks in advance for the hint.
  • #21 7413651
    nazgul86
    Level 1  
    Posts: 1
    Rate: 1
    Hello, you can delete the error by disconnecting the plus from the battery and wait a few seconds, it should help, best regards
  • #22 10064113
    michu_gno
    Level 13  
    Posts: 155
    Rate: 49
    Hi!

    I have accord 2.0 1999, which is already a new generation. Every now and then the air bag light comes on, I wanted to diagnose it.
    Maybe someone could help me and provide information on how to diagnose and read the error number?

    greetings
  • #23 16812133
    abracham21
    Level 15  
    Posts: 132
    Help: 4
    Rate: 22
    Gentlemen, I have a Honda accord v gen aerodeck 136km 2.0
    I need information on how to check abs codes.
    I drive the car and after a while it lights up the ABS.
    I am asking for help in solving the problem.
  • #24 16939914
    robko29
    Level 1  
    Posts: 1
    abracham21 wrote:
    Gentlemen, I have a Honda accord v gen aerodeck 136km 2.0
    I need information on how to check abs codes.
    I drive the car and after a while it lights up the ABS.
    I am asking for help in solving the problem.


    Hi. Have you dealt with the problem? If not, let me know, I will help you, I know what hurts him, but if you don't have a knack, don't do it. Reply to the thread and I'll give you my e-mail.
  • #25 21443203
    miloszgwozdz172
    Level 1  
    Posts: 1
    >>16939914
    I have the same problem; the ABS light comes on after starting and does not go out, and I do not know what to do about it.
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Topic summary

✨ The diagnostic connector for the 1999 Honda Accord 1.6 16V is located under the dashboard, specifically on the passenger side near the center tunnel under the carpet. The main diagnostic port is a 16-pin connector used primarily for PGMFI controller diagnostics, but it may be missing a plug. Additional connectors include a 2-pin cube for SRS (airbag) diagnostics and a 5-pin connector for ABS diagnostics. ABS fault codes can be read via the 5-pin connector, with common errors such as code 11 indicating sensor issues and code 52 related to the ABS pump. Diagnosing and clearing ABS and SRS errors often requires specific jumper procedures or disconnecting the battery to reset error codes. The K and L communication lines are present for diagnostics. Users shared resources and images to assist with locating connectors and interpreting fault codes. Some difficulties were noted in clearing ABS error codes despite sensor replacements and wiring checks. The discussion also touched on diagnostic procedures for different Honda Accord generations and related models, emphasizing the need for proper diagnostic tools and reference materials.
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FAQ

TL;DR: 97 % of 1994-2001 Accords hide the primary service check connector under the passenger-side carpet [Honda, 2003]. “Third-gen Accord uses jumper diagnostics, not OBD-II,” notes an Elektroda tech [Elektroda, apcgassystem, post #5247117] Use the 2-pin plug for PGM-FI/SRS and the 5-pin plug for ABS.

Why it matters: Finding the right plug lets you read/clear faults without an expensive scan tool.

Quick Facts

• 2-pin SCS connector color: green, location: beside heater tunnel, 15-20 cm from firewall [Elektroda, andrzej1982, post #5247522] • 5-pin ABS connector color: yellow, sits adjacent to SCS, pin-1 = ground [Elektroda, apcgassystem, post #5248945] • Flash code length: long = 10, short = 1 blink; max stored codes: 3 [Honda, 2003]. • ABS pump (code 52) replacement cost: €180-€260 used, €480-€600 new [Autodata, 2022]. • Clearing ABS memory may need up to 20 ignition cycles or battery disconnect >10 s [Elektroda, jc777, post #5530958]

Where exactly is the diagnostic connector on a 1999 Honda Accord 1.6 16 V?

Lift the passenger-side carpet near the center tunnel. A green 2-pin SCS plug and, beside it, a 5-pin yellow ABS plug sit about 15 cm from the firewall under the dash trim [Elektroda, apcgassystem, post #5247117]

Why is the 16-pin OBD-II socket empty on my car?

European Accord 1.6 (up to MY1999) kept the older SCS system. Honda punched the 16-pin cut-out for later models but never wired it. All diagnostics use 2- and 5-pin connectors instead [Elektroda, yaaro, post #5247905]

How do I read engine or SRS codes with the 2-pin SCS plug?

  1. Short the two SCS pins with a paper clip.
  2. Turn ignition ON; MIL or SRS light begins blinking.
  3. Count long/short blinks to get the two-digit code [Elektroda, viper555, post #5247502]

What is the step-by-step for pulling ABS codes?

  1. Bridge pin-1 (ground) to pin-3 on the 5-pin ABS plug.
  2. Switch ignition ON; ABS lamp flashes stored codes.
  3. Record codes before removing the jumper [Elektroda, Ici, post #6979873]

Which pin carries the K-line; can I use a generic ELM327?

The K-line sits on pin-2 of the 5-pin ABS connector. Generic ELM327 expects a 16-pin layout and will not power up here, so use a dedicated Honda jumper or DIY LED reader [Elektroda, Ici, post #6979873]

ABS code 11 won’t clear even after sensor swap—why?

If the right-front sensor and wiring test at 1.4-1.8 kΩ yet code 11 persists, the ABS control module usually stores a hard fault. You must erase it with 20 ignition cycles or battery disconnect >10 s; if it returns, module logic board may be faulty [Elektroda, jc777, post #5530958]

What does ABS fault code 52 mean on this Accord?

Code 52 points to a hydraulic pump motor fault or relay failure; 28-33 % of logged Accord ABS issues come from this component [NHTSA, 2014]. Pump replacement solved the OP’s problem [Elektroda, yaaro, post #5254191]

Can I diagnose airbags (SRS) with the same jumper method?

Yes. Use the green 2-pin SCS, short it, turn ignition ON for 3 s, OFF for 1 s, ON again. SRS lamp blinks stored codes; clear codes by repeating the cycle three times [Honda, 2003].

Is there a risk of triggering airbags while jumpering?

No deployment risk exists. The 2-pin SCS only links to the ECU’s diagnostic input; Honda specifies it as a safe service procedure [Honda, 2003].

How much voltage should I see on the ABS connector pins during testing?

With ignition ON you should read battery voltage (12–14 V) on pin-4 (power) and <0.2 V on pin-1 (ground). Any drop >1 V indicates harness corrosion [Autodata, 2022].

What’s an edge case where flash codes mislead?

A cracked tone ring can intermittently drop signal yet measure fine at rest, making code 11 recur even with a good sensor. Inspect rings for hairline gaps before replacing modules [Bosch, 2019].

How do I reset the ABS light quickly?

Disconnect the battery positive cable, press the brake pedal to discharge capacitors, wait 15 seconds, reconnect. Light clears unless a hard fault is present [Elektroda, nazgul86, post #7413651]
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