Parking Aid Module gone again!
Discussion
My 9.5MY V8V is now in need of its third Parking Aid Module in as many years (11,000 miles covered in that time and mostly not in reverse!) having somehow blown up the previous ones; also had to replace three faulty sensors during that same time frame.
I thought I would take the latest broken one apart to see what it contained. Here is a photo of one side of the PCB:
The circled item gets extremely hot as soon as the module is activated so I was wondering if anybody with electronics experience could tell me what this part is and whether a replacement is likely to be found?
Thanks for any assistance.
I thought I would take the latest broken one apart to see what it contained. Here is a photo of one side of the PCB:
The circled item gets extremely hot as soon as the module is activated so I was wondering if anybody with electronics experience could tell me what this part is and whether a replacement is likely to be found?
Thanks for any assistance.
Sorry can't help there.
2V code comes up with a MMBTA64 transistor which it most certainly isn't
I've never met an SMD package with inverted digits. I see there is also a 1v (with additional inverted 1V) on the board.
You could burn a lot of time trying to repair one of these in the dark so just suck it up and buy a new one.
However, it's perhaps worth noting that there looks to be some fairly extensive water stains spawning from the top right and bottom right holes where the plastic lugs poke through. (the white residue)
That doesn't look right to me and could indicate why you keep destroying boards.
I'm not familiar with where the module is mounted but I'd be looking for potential water ingress as the cause for your ongoing issues.
2V code comes up with a MMBTA64 transistor which it most certainly isn't
I've never met an SMD package with inverted digits. I see there is also a 1v (with additional inverted 1V) on the board.
You could burn a lot of time trying to repair one of these in the dark so just suck it up and buy a new one.
However, it's perhaps worth noting that there looks to be some fairly extensive water stains spawning from the top right and bottom right holes where the plastic lugs poke through. (the white residue)
That doesn't look right to me and could indicate why you keep destroying boards.
I'm not familiar with where the module is mounted but I'd be looking for potential water ingress as the cause for your ongoing issues.
Hello Pete, thanks for the quick response.
My question was posed as much out of curiosity as a quest to fix the offending part; new modules are approximately £105 + VAT plus some dealer coding to get it talking to the front sensors, etc.. That said, some PCB repair companies offer a two year warranty as opposed to a AM parts twelve month warranty so given that this module lasted fourteen months before dying it may work out cheaper in the long term to have one fixed (that said yet to try for a repair price).
Interesting what you say about the water ingress. My car is a RHD model and so the module is tucked below the battery, behind the carpeted trim that is located behind the drivers seat. I would hope there isn't water ingress in that area but the corner you highlight does sit at the top of the module and the module itself is not sealed within its plastic casing. There are no water marks on the casing (inside or out) or on the reverse of the PCB.
My question was posed as much out of curiosity as a quest to fix the offending part; new modules are approximately £105 + VAT plus some dealer coding to get it talking to the front sensors, etc.. That said, some PCB repair companies offer a two year warranty as opposed to a AM parts twelve month warranty so given that this module lasted fourteen months before dying it may work out cheaper in the long term to have one fixed (that said yet to try for a repair price).
Interesting what you say about the water ingress. My car is a RHD model and so the module is tucked below the battery, behind the carpeted trim that is located behind the drivers seat. I would hope there isn't water ingress in that area but the corner you highlight does sit at the top of the module and the module itself is not sealed within its plastic casing. There are no water marks on the casing (inside or out) or on the reverse of the PCB.
Hello Martin,
I had compiled the above to Pete as you posted your response.
So it it possible that the rain runs in from the rubbish boot design and somehow finds its way down into this module. Presumably it can't be condesation due to the water marks being localized in the top corner.
Do you think there would be any harm in sealing the replacement module casing prior to fitting?
Thanks.
I had compiled the above to Pete as you posted your response.
So it it possible that the rain runs in from the rubbish boot design and somehow finds its way down into this module. Presumably it can't be condesation due to the water marks being localized in the top corner.
Do you think there would be any harm in sealing the replacement module casing prior to fitting?
Thanks.
Bouldermobile said:
Interesting what you say about the water ingress. My car is a RHD model and so the module is tucked below the battery, behind the carpeted trim that is located behind the drivers seat. I would hope there isn't water ingress in that area but the corner you highlight does sit at the top of the module and the module itself is not sealed within its plastic casing. There are no water marks on the casing (inside or out) or on the reverse of the PCB.
Can't imagine it's condensation and surely a really weird place for water to find its way to. There's the gearbox hump to clear before it gets down there although there are obviously cable routes snaking their way from the back of the car.I'd probably be having a conversation with an aston dealer or perhaps better an independant to fathom out what possible route the water could take.
Chances are if you fix the cause, you'll not need a replacement again
I wondered about the water working its way down the loom but the location of the multi plugs means the water would have to track upwards to reach the corner with the water marks.
I also thought the fault would be most likely to occur during or shortly after either washing or driving the car in the rain, neither were true as it failed as I reversed into the garage after a 200 mile, completely dry journey.
I also thought the fault would be most likely to occur during or shortly after either washing or driving the car in the rain, neither were true as it failed as I reversed into the garage after a 200 mile, completely dry journey.
Bouldermobile said:
I wondered about the water working its way down the loom but the location of the multi plugs means the water would have to track upwards to reach the corner with the water marks.
I also thought the fault would be most likely to occur during or shortly after either washing or driving the car in the rain, neither were true as it failed as I reversed into the garage after a 200 mile, completely dry journey.
Nope. If the water needs to slosh around, even making its way uphill during braking/acceleration/cornering to find your module, a 200 mile journey sounds perfect.I also thought the fault would be most likely to occur during or shortly after either washing or driving the car in the rain, neither were true as it failed as I reversed into the garage after a 200 mile, completely dry journey.
It's in the middle of the car so rain/washing is not really going to make it wet without further provocation.
As I said; talk to a dealer/indy who may have experience but do not discount the evidence of water damage. That's why it's (they've) failed.
I think its fair to say that water destroyed the parking module in my V8 Roadster, after being left outside in fairly heavy rain I could hear water sloshing underneath me, strange high pitch noises came from the parking module speaker before it totally gave up. 
Eventually got around to removing it but to late. Tried to find one on Ebay but to many different variants. Unit made by Valeo with Jaguar printed on outside. Similar modules used on many cars from Skoda to Range Rover but non matched all the numbers.
Ordered one from Aston Cambridge who got it sent straight to my from factory, installed it but still did not work correctly, so when she went in for service got them to have a look, turned out one of the rear sensors also damaged by water.
Eventually got around to removing it but to late. Tried to find one on Ebay but to many different variants. Unit made by Valeo with Jaguar printed on outside. Similar modules used on many cars from Skoda to Range Rover but non matched all the numbers.
Ordered one from Aston Cambridge who got it sent straight to my from factory, installed it but still did not work correctly, so when she went in for service got them to have a look, turned out one of the rear sensors also damaged by water.
Bouldermobile said:
The circled item gets extremely hot as soon as the module is activated so I was wondering if anybody with electronics experience could tell me what this part is and whether a replacement is likely to be found?
Thanks for any assistance.
Looks like a diode, Schottky or zener is my guess.Thanks for any assistance.
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