Electrical & Lights "Immobilised" HR-V

Discussion in '1st Generation (1999-2006)' started by PumpkinTruck, Thursday 3rd Jan, 2019.

  1. PumpkinTruck Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Adam Derby
    5
    3
    Hi Everybody,

    I'm having issues with my HR-V 1st Generation VTEC (2000). This happened just before christmas. I had been running some errands here and there, as one does at that time of year. Went to start the car after a short shop and it wouldn't start - green key dash light flashing. Car was turning over fine but not sparking into life. Assumed this was something to do with either key chip being damaged or a fault with the imob/forgotten the coding. Tried removing and recharging the battery, tried the other key - same thing (neither key is a master/red key) Had an auto locksmith out today to reprogram but he said there was no issue with either key, ECU or the transponder. He reckons it has something to do with moisture getting to the electrics in the footwell (damp footwell on DS) causing corrosion leading to a break in communication. As he wasn't an auto electrician that was all the info i got.

    I'm planning to have a proper look around under there and unplug, check and plug back in some of the bits but other than that I have no idea.
    Can anybody help with some kind of direction. Seems there is very little info on this model.

    Thanks!
     
  2. honda_saj Club Veteran ★ ★ ★ ★ ★

    United Kingdom saj east london
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    I believe honda HDS may be a good diagnotsic here to check ECU status anyone nearby to derby on here ?
     
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  3. PumpkinTruck Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Adam Derby
    5
    3
    Thanks for the shout out for a local HDS Saj.

    Thought I'd update on the situation. I have been through the fuses and had a good look around and can't see anything obvious there is also no change in the flashing green key of death situation. Having looked around yet again on the internet, the flashing key symbol indicates there is some issue with the imob which is contrary to what the key chap found from his various boxes he plugged in.
    Today I had my brother take a look with me and started at the beginning. When the key is turned, the fuel pump whirs and the imob light flashes and continues to flash engine turn over but no start. We took a look at the plugs they seemed fine. We also got a spark on first turning but then nothing. Looked in and cleaned the distributor, some pittng in the points but nothing major. We also plugged in a fault code reader which displayed no faults.
    Personally I'm a little doubtful that the damp footwell is the cause as all thats in the damp (not puddling) bit is the loom connection to the rear. What I'd like to know is:
    What does the imob shut off?
    Is there a way to bypass it?
    Without diagnostic kit, how can I identify where the fault lies?
    Also, as there isn't much information on HRVs which Honda model is closest to use as a reference for wiring diagrams etc?

    Workarounds I have found online: slam the steering column up and down...didn't work. Locking and unlocking with key in ignition... didn't work. Key in ignition, turn to pos2, remove and reinsert double quick...tried lots and didn't work.
    Next on the list from the internet...let the battery go flat, then jump start with key in ignition. Replace battery. After that, I'm out of ideas.

    Don't mind spending a bit to get this sorted but don't want to throw money at it for nothing.

    Thanks in advance!
     
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  4. Beefy Club Veteran ★ ★ ★ ★ ★

    United Kingdom Stoke
    1,398
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    The Honda diag computer can tell you what isn’t normal on the imob system. Ruling out the feeds and earths first you are then left with a possible communication issue between the immob key receiver, IMOS/MICU and ECM or failure within one of the three components of the immob system. Each time the ignition is cycled, the transponder that surrounds the ignition barrel reads the code sent to the key the last time the ignition was on. This code is communicated to the ECM via the MICU which receives the code and decides if it is correct. A new code is then written to the key and the PGMFI relay is energised allowing spark and fuel. This is called rolling code and is how all Honda immobilisers function. It’s not uncommon for any of the above units to prove faulty unfortunately. The key transponder is the most common cause of immob faults. But I have diagnosed ECM and MICU as a cause before now.
     
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  5. honda_saj Club Veteran ★ ★ ★ ★ ★

    United Kingdom saj east london
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    804
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    honda HDS unit is the only real way to diagnose you can get a HDS him for around £100 i think as this point if no one is local to you, you can always use it on any honda vehicle.
     
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  6. SpeedyGee Club Manager Club Staff

    England Speedy Birmingham
    16,816
    7,352
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    Correction, you can get a Chinese Clone for £100, not the real deal! :Laughing:
     
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  7. honda_saj Club Veteran ★ ★ ★ ★ ★

    United Kingdom saj east london
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    It does every thing lol :lol:
    - - - Updated - - -
    i did mention him i thought the him were all clone units :gotcha:
     
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  8. PumpkinTruck Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Adam Derby
    5
    3
    Thanks guys, had a look around and have seen the HDS units available on Ebay for around £100. I also got in touch with a local Japanese car specialist (Powerhouse Ltd) who were very helpful and said they have several pieces of diagnostic kit to get to the root of the issue for £50. Which, seems like a good bet as I can also get advice etc from them. TBH if I bought the HDS I'd probably only use it the one time. I just need to work out getting my car to them...

    Thanks for the input guys, I'll let you know how I get on! :Niceone:
     
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  9. PumpkinTruck Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Adam Derby
    5
    3
    I am now re-mobilised!!!

    I had the car towed as above to Powerhouse Ltd in Derby who have checked over the immob system again (all is fine) they reset the ECU and the car started and is now fine!
    Not sure why this has occurred in the first place or if it will happen again...... If anybody has any idea please post.

    Thanks for all the support people!
     
  10. honda_saj Club Veteran ★ ★ ★ ★ ★

    United Kingdom saj east london
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    804
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    How much did this all cost you for £100 you could have bought HDS and i could have shown you how to reprogram keys.
    I have heard if battery goes really low this can happen @SpeedyGee you are the one who told me about this anything to add ?
     
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  11. PumpkinTruck Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Adam Derby
    5
    3
    Including the initial key guy and the towing it cost me £160 all in so i'm quite happy. As I said, there wasn't any issue with the keys or immob. It seems that it was only the ECU needed resetting.
    Could the HDS reset the ECU?
    To be fair I could have bought the HDS and not been any further forward. I had to go with the option most likely to succeed i.e. getting it to someone with kit and knowhow.
     
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  12. honda_saj Club Veteran ★ ★ ★ ★ ★

    United Kingdom saj east london
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    804
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    HDS him can reset and carry out many test on all honda vehicles glad all sorted the fun is all in the learning :Smile: i would have never known about cars and mostly self taught.
    Seems like your like ECU got jammed.
    here is a link
    [TMO] ECU Reset Mythology
     
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  13. SpeedyGee Club Manager Club Staff

    England Speedy Birmingham
    16,816
    7,352
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    The one case I had was my nieces CR-V, the main battery went dead with the keys in the ignition. Jumping the car, the car failed to start so I had it towed to my house. When I looked into things, the keys had got disassociated, so I had to repair the keys to get the car started.
     
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