SRS light but no dtc
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Thread: SRS light but no dtc

  1. #1
    crv|oc Rank: Member
    Join Date
    Apr 2010
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    Rochester, MN
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    SRS light but no dtc

    Hello,

    I have a 2002 CR-V (LX 2wd). SRS light came on. I have the service manual and used the special SCS connector to try and get the dtc code (i.e. count the blinks).

    But there was no stored code. In other words the light stayed on steady and according to the service manual this is "normal".

    So I used the service manual and SCS connector to reset the SRS indicator. Light went out and stayed out. Several days later the SRS light came on again. But again there was no stored dtc. Reset the light. Stayed off about a day and then came back on. Still no code.

    Without a stored dtc to guide a repair, I'm reluctant to throw it at the mercy of the dealer.

    Has anyone on the forum experienced a similar situation?

    Thanks.

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  3. #2
    crv|oc Rank: Sophomore
    Join Date
    Jul 2007
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    West By God Virginia
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    344
    Quote Originally Posted by dverbeck View Post
    I have the service manual and used the special SCS connector to try and get the dtc code (i.e. count the blinks).
    Did you short the SCS terminal at the DLC to access the flash codes, or did you use the SCS jumper tool to short the MES connector at the under dash fuse panel?

    Shorting the SCS terminal at the DLC (which does not entail using the SCS jumper tool) is the correct method of accessing flash codes - the jumper tool is used to erase SRS DTC memory, and for another function to initialize the OPDS on equipped vehicles.

    If you are correctly entering flash diagnostics by shorting the SCS terminal at the DLC, then you should reset the SRS and monitor charging system voltage and capture the voltage when the SRS re-illuminates. High charging system voltage (16V +) can cause an SRS indication with no stored DTCs. Alternator replacement would be indicated if you capture a high charging system voltage condition.
    Success is 99% failure
    -Soichiro Honda

    Success is the ability to go from one failure to another with no loss of enthusiasm.
    -Winston Churchill

    Motorcycle Riding in West Virginia

  4. #3
    crv|oc Rank: Member
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    Hi Honda Tech,

    Thanks for the reply. I was attaching the SCS connector to the MES to make the system blink the DTC via the SRS light. But based on your question, I referred back to the Service Manual and I can see what I did was incorrect. I had mistakenly assumed that hooking up the SCS to the MES would ground the SCS line.

    But now I'm not sure how to proceed. As I read the second step (pg 23-24 of 2002 CRV manual) it says:

    "2. Connect the Honda PGM Tester to the DLC and follow the Tester's prompts in the 'SCS' menu to ground the SCS line"

    Is there another way to ground the SCS line without the use of a PGM tester? Perhaps grounding a certain pin on the DLC?

    Any specifics would be much appreciated.

    Thanks.

  5. #4
    crv|oc Rank: Member
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    I did some googling and found out that jumping pins 4 and 9 of the DLC will ground the the SCS line and hopefully get the SRS light to blink out the DTC.

    I plan on fashioning a jumper out of solid core residential wiring.

    If anyone has done this before and can add any helpful tips or precautions, I'd appreciate it.

    Thanks.

  6. #5
    crv|oc Rank: Member
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    Apr 2010
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    SRS troubleshooting

    Hello,

    I am reposting a thread I originally placed in the Maintenance and Service sub-forum. I probably should have posted it here in the Problems & Issues.

    Here is a link:

    SRS light but no dtc

    I think I may have figured out a course of action but any feedback from more experienced members would be helpful.

    Thanks.

  7. #6
    crv|oc Rank: Sophomore
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    Quote Originally Posted by dverbeck View Post
    I did some googling and found out that jumping pins 4 and 9 of the DLC will ground the the SCS line and hopefully get the SRS light to blink out the DTC.

    I plan on fashioning a jumper out of solid core residential wiring.

    If anyone has done this before and can add any helpful tips or precautions, I'd appreciate it.

    Thanks.
    I tried this with a paperclip. My brother (who does this all the time on his 00' Accord) attempted to jump pins for a MIL light on my V. The only problem was he counted backwards and jumped pin 16 and 4 by mistake... don't do that. Luckily there was no permanent damage, just a blown fuse.

    See this thread Flash code using paperclip??? (poor man's code reader) The DLC actually has very small numbering on the pins, make sure you jump the right ones (4 & 9) and you'll get the flash code.

  8. #7
    crv|oc Rank: Member
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    thud105,

    Thanks for the precaution, I'll look for the little numbers.

    This should be a nice weekend project. I hope I don't get an SRS module failure - they sound expensive. I hear that some component failures (seat belt retractors??) will be covered by Honda via a longer warranty. But I want to be armed with the codes before I go to the dealer.

  9. #8
    crv|oc Rank: Member
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    I was able to dump the DTC (9-3) which is a faulty driver's side seat belt switch.

    Sure enough, I could make the SRS light at will by slowly withdrawing the seat belt from the buckle. The switch would make a clicking noise but the circuit still indicated the belt was still latched and immediately the SRS would light.

    It makes sense this would wear out considering the number of times we have buckled up in the last eight years. I've ordered a new buckle assembly for $152 (two day delivery).

  10. #9
    crv|oc Rank: Junior
    Join Date
    Jan 2010
    Location
    NJ, USA
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    Quote Originally Posted by dverbeck View Post
    I was able to dump the DTC (9-3) which is a faulty driver's side seat belt switch.

    Sure enough, I could make the SRS light at will by slowly withdrawing the seat belt from the buckle. The switch would make a clicking noise but the circuit still indicated the belt was still latched and immediately the SRS would light.

    It makes sense this would wear out considering the number of times we have buckled up in the last eight years. I've ordered a new buckle assembly for $152 (two day delivery).
    If you take it to Honda I believe they fix this for free.

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