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Anyone local to West Yorkshire willing to help?

F6HAD

F6HAD

Affiliate / Co-Founder
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Location
Halifax
Car
2009 Accord IDTEC
Hi folks, I’m trying to eliminate an issue on our project car (8th gen Accord Type S) where the cruise control doesn’t work in 6th gear. After quite a bit of fault finding and data logging (including a replacement clutch switch) I have a feeling it might be down to incorrect tyre sizes.

The car should be on factory calibrated 225/45 or 235/45 tyres but is on 245/40/18. Ordinarily I don’t think it would be an issue but a lot of my research is pointing to this being a possible cause.

If someone is local and has an 8th gen (doesn’t need to be a Type S) willing to spare a bit time for me swap the wheels over so I can eliminate, I would very much appreciate it. I’ll owe you a favour :)
 
Sorry been away on holidays (Malta highly recommended). I actually got someone to let me try their wheels the day after my original post.. sadly it didn’t solve my issue but at least helped me eliminate one possible cause.

Thanks for the offers of help guys.
 
Yep, and I’ve also replaced the gearbox speed sensor with a brand new item (went through 2 of them before realising why the little washer/spacer was so important) #facepalm

But fundamentally the VSS is working perfectly, I’ve replaced both clutch pedal switches (A and B) and triple checked their adjustment, also adjusted the master cylinder pushrod according to Honda specs for pedal travel.

I’ve also tried a replacement ecu. The issue remains.

I’ve got an instrument cluster on order (based on some advice from a Honda tech and studying the workshop manual) as the cluster also acts as a gateway module.

I’ve spent time data logging and each time the cruise is engaged in 6th gear, it immediately cancels itself and shows that it has sensed the clutch pedal was pressed. It only does this in 6th and every single time.

As far as I can tell this vehicle doesn’t have a neutral position or gear selection sensor, so there isn’t a specific sensor telling the ecu that it’s in 6th gear.

Either it’s the cluster/gateway module or somehow a wire is chaffing from the clutch pedal switch when 6th is engaged.

Previous owner tells me it’s always had this issue since he owned it (2+ year period)

I can see it had a new clutch fitted 5 years ago so I’m guessing something happened at that time maybe. I’m motivated to get to the bottom of it, along with the memory seat function not working, this is the last job left. I’ve rectified so much and genuinely enjoyed working on it. It’s become my daily in fact..

Anyway if anyone has seen this issue before or has any other ideas as to what might be causing it then feel free to chime in.
 
F6HAD said:
I’ve got an instrument cluster on order (based on some advice from a Honda tech and studying the workshop manual) as the cluster also acts as a gateway module.

I can see it had a new clutch fitted 5 years ago so I’m guessing something happened at that time maybe. I’m motivated to get to the bottom of it, along with the memory seat function not working, this is the last job left. I’ve rectified so much and genuinely enjoyed working on it. It’s become my daily in fact..

Anyway if anyone has seen this issue before or has any other ideas as to what might be causing it then feel free to chime in.
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Try fixing the seat first, whilst seemingly separate it might have something to do with the cruise control.



You are out of options as far as I can tell without spending far more time on the original issue. Are the seats independently wired for memory ?
Is/are the key fobs original or aftermarket replacements ?
 
TSX forums say that memory seats are controlled by the drivers door multiplex unit and they do like to go bad. Can you swap it out with a spare and check?

In case this may help someone. The issue turned out to be an aftermarket driver master window control switch I replaced. The aftermarket (amazon) switch that claimed to replace OEM part number 35750-TL2-A12 disabled the seat memory features and driver window auto-up feature.
Plugging in my old switch which had a broken/intermittent button for driver window restored the seat memory functionality.
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Thanks for the replies guys, this was always going to be a bit of a rescue project and most of the issues were small or just a bit tricky so I’ve been happy to spend the time fixing them, especially as it’s a facelift tourer Type S, kind of the holy grail in the 8th gen series.

I believe the MICU does have some fault as the drivers door puddle light wasn’t working and I had to take the switched ground from the door switch. It’s a common issue on these.

It’s possible that also has a fault related to the memory seat, but I just haven’t investigated it yet. And yes the car has 2 keys, one of which is a replacement aftermarket unit.

I don’t believe the cruise control issue is related to the memory seat function, as it only exhibits the issue in 6th gear. And the multiplexer has no connection to the cruise control. All the wiring diagrams show that the circuitry goes through the instrument cluster and engine ecu.
 
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