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Discussion Starter · #1 ·
I have been told by my mechanic that my 2010 Peugeot 207 has a faulty state of charge lead and is causing the electrical power steering and a/c to malfunction. Apparently there is/are diodes within that are most likely faulty. I am in Australia and there are no new or used parts available anywhere in the country. Has anyone had this problem or has a solution as I have run out of options? Thanks in advance
 

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Have you contacted a Peugeot dealer’s parts department? They have told me in the past that when necessary they can order parts from France. I think these auxiliaries battery charge status control units are common on later Peugeots but I can’t find any after markets units here either.
 

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I have been told by my mechanic that my 2010 Peugeot 207 has a faulty state of charge lead and is causing the electrical power steering and a/c to malfunction. Apparently there is/are diodes within that are most likely faulty. I am in Australia and there are no new or used parts available anywhere in the country. Has anyone had this problem or has a solution as I have run out of options? Thanks in advance
The diode pack normally located in the alternator, take to auto electrician that rebuilds alternators, they can replace them or even upgrade diode pack. This is your best option apart from replacing from wreck vehicle. Think that is what he's referring to, not a diode in power steering or a/c. The sensors get upset when power is out of phase, which is caused by a diode dying in the alternator.

I maybe wrong in my interpretation of the information, but I hope you find this helpful.
 

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The diode pack normally located in the alternator, take to auto electrician that rebuilds alternators, they can replace them or even upgrade diode pack. This is your best option apart from replacing from wreck vehicle. Think that is what he's referring to, not a diode in power steering or a/c. The sensors get upset when power is out of phase, which is caused by a diode dying in the alternator.

I maybe wrong in my interpretation of the information, but I hope you find this helpful.
The alternator diode pack is a rectifier. Later Peugeot especially those with engine stop/start sytems have a small unit next to the negative battery terminal. These are know to cause a problem.
 

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So, Ian, are they basically the same thing / repairable or sealed units (assuming sealed, since that way gotcha moment) ?

Also, do you happen to know the name of the part or part no. Might help out the OP.
 

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If you don't have the unit on the battery terminal, the alternator diode pack is part of the alternator itself - you can get them repaired by a specialist as per the post above, or just replace the alternator entirely. Not sure if this still applies if you do have the battery terminal unit - is this instead or in addition to the normal alternator diode pack ?
You'll need to find out from the mechanic exactly which part he's talking about - but your local Peugeot dealer can order whatever part you need, just take your VIN number to them, and if they need to source it from France then they will. I've had a few bits in this way with no issues.
When he said "state of charge" he probably said STATOR not "state of" - the Stator is part of the alternator
 

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Here is an example of battery charge status control unit it's the small box at next to the battery terminal connection. The battery charge status unit is a protection to stop the battery from being heavily discharged. They are sealed units.

The alternator is a three phase a/c generator. They have a 6 diodes in a bridge. If you were to locate the diode bridge away from the alternator you would need three heavy duty cables to connect it. There are also three other diodes that provide a reference. The alternator charge rate is controlled by the rotor excitation. In a Peugeot the excitation is usually provoded by the ECU.

Border_all gives a good explanation of the battery charge status unit in this forum post: Battery charge status unit

94263
 

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Just a thought. How old is the battery? Could the battery status unit be doing its job? I may be wrong on this but I think when this unit fails the car won't start.
 

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Discussion Starter · #9 ·
Have you contacted a Peugeot dealer’s parts department? They have told me in the past that when necessary they can order parts from France. I think these auxiliaries battery charge status control units are common on later Peugeots but I can’t find any after markets units here either.
Thanks for the reply, Yes I have spoken to them and they informed me they are not manufacturing them anymore and have no stock, I got them to look up a complete negative lead assembly.
 

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Discussion Starter · #10 ·
Just a thought. How old is the battery? Could the battery status unit be doing its job? I may be wrong on this but I think when this unit fails the car won't start.
Car starts and drives ok, just no power steering , a/c intermittent or non existent and battery light on
 

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Car starts and drives ok, just no power steering , a/c intermittent or non existent and battery light on
My understanding of this unit is it triggers the BSI to shut down some things to prevent too much battery drain. However, when the engine is running the alternator should supply enough current so the battery should not be discharging. I wonder if the alternator is working properly the voltage across the battery should be about 14V when the engine is running if the alternator is okay
Thanks for the reply, Yes I have spoken to them and they informed me they are not manufacturing them anymore and have no stock, I got them to look up a complete negative lead assembly.
I wonder if the BSI can be reconfigured to omit this unit.
 

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Rocklea Auto Parts, QLD Australia are wrecking 207 2007 model atm (might be useful idk)

^used Rocklea Auto parts before when used to live QLD, no issues to report.

207 2008 model

Silkstone appear to have three, 207 being wrecked on gumtree
WRECKING 2007 PEUGEOT 207 AUTO 1.6L HATCH FREE PARTS DEL AUS WIDE | Wrecking | Gumtree Australia Ipswich City - Silkstone | 1277244590
 

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Car starts and drives ok, just no power steering , a/c intermittent or non existent and battery light on
I just did a bit more reading on these battery monitors. This Bosch article is quite good: Electronic battery sensor.

I would be very surprised if a fault in this unit turns off the power steering it's too dangerous. It far more likely that the BSI would not let the car start. When the engine is running the battery monitor should be checking if the battery is being charged. If it detects that there is actually a battery drain then it will trigger a shut down of non essential things such as air-conditioning.

Apparently there was a common problem with 207 steering pumps so I suspect this may be the cause of the problem. The fuse to this unit is typicaly 50A. If this unit is faulty then it may be drawing excess current which may not be high enough to blow the fuse but enought for the battery monitor to trigger the BSI to shut down the A/C.

I suggest you seek a second opinion or even book the car in at a dealer. They will have the proper Peugeot diagnostic tools. If the battery monitor is faulty they may be able to disable its function in the BSI settings.
 

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There's also another thread where a guy had a faulty alternator that was outputting excessive voltage.
Enough to trigger various faults with AC and Steering and other systems - if he put the highbeams and rear-screen heater on, then the voltage dropped enough that everything worked ok !
 

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Car starts and drives ok, just no power steering , a/c intermittent or non existent and battery light on
This light is on because your alternator is not properly charging, and I am doubtful any other system would cause this light to be ON. So, for example, if the belt is slipping / off can cause a problem with these charging as the alternator will be from unable to struggling in delivering the correct power under load.

However, nearly always the problem is normally in the alternator itself and/or very rarely battery or negative ground (high ohm reading in earth wiring) or other associated wiring looms for the charging circuit. It is possible for charging issue / light on to also kill the battery, depends on the exact issue in charging circuit which caused the light ON situation.

The 207 I believe uses electric power steering, thus the charging issue is going to effect this.
A/C might be effecting the fan or electrical clutch pull, which engages the A/C on the compressor. These issue I would suggest are related to battery light ON and would eliminate this before worrying about anything else.

My suggestion is not to go boarding or riding the parts train, until you have diagnosed the issue. Any decent auto electrician will be able to do this if you don't have the skills yourself and workshop manual for your vehicle to check working order of the systems.

Hope you find this helpful.
 

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This light is on because your alternator is not properly charging, and I am doubtful any other system would cause this light to be ON. So, for example, if the belt is slipping / off can cause a problem with these charging circuits. However, nearly always the problem is normally in the alternator itself and/or very rarely battery or negative ground (high ohm reading in earth wiring) or other associated wiring looms for the charging circuit.

The 207 I believe uses electric power steering, thus the charging issue is going to effect this.
A/C might be effecting the fan or electrical clutch pull, which engages the A/C on the compressor.
I agree a check of the alternator would be a good idea.

In this car the battery light is controlled by the BSI. I suspect the BSI is likely to turn the battery light on if either the alternator isn't charging properly or if the battery monitor detects a fault.
 

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Discussion Starter · #17 ·
This light is on because your alternator is not properly charging, and I am doubtful any other system would cause this light to be ON. So, for example, if the belt is slipping / off can cause a problem with these charging as the alternator will be from unable to struggling in delivering the correct power under load.

However, nearly always the problem is normally in the alternator itself and/or very rarely battery or negative ground (high ohm reading in earth wiring) or other associated wiring looms for the charging circuit. It is possible for charging issue / light on to also kill the battery, depends on the exact issue in charging circuit which caused the light ON situation.

The 207 I believe uses electric power steering, thus the charging issue is going to effect this.
A/C might be effecting the fan or electrical clutch pull, which engages the A/C on the compressor. These issue I would suggest are related to battery light ON and would eliminate this before worrying about anything else.

My suggestion is not to go boarding or riding the parts train, until you have diagnosed the issue. Any decent auto electrician will be able to do this if you don't have the skills yourself and workshop manual for your vehicle to check working order of the systems.

Hope you find this helpful.
Thanks for the input. The car has been to 2 auto electricians, with one of them a European specialist who was given the car to sort out by the European Mechanical specialist, and all have said alternator is good. The electric steering motor is getting power and it jolts when the car starts like a few other small cars I have driven. The battery warning comes on a minute or so after you start driving, however the steering and A/c does not, however the a/c clutch pulses but gas sensors checked ok. It might be time to take a deep breath and drive it into the dealers. FYI I will try to post a photo of the cable that I could not source, however I do have a French contact chasing one up
 

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Discussion Starter · #18 ·
Thanks for the input. The car has been to 2 auto electricians, with one of them a European specialist who was given the car to sort out by the European Mechanical specialist, and all have said alternator is good. The electric steering motor is getting power and it jolts when the car starts like a few other small cars I have driven. The battery warning comes on a minute or so after you start driving, however the steering and A/c does not, however the a/c clutch pulses but gas sensors checked ok. It might be time to take a deep breath and drive it into the dealers. FYI I will try to post a photo of the cable that I could not source, however I do have a French contact chasing one up
94289
 

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If you Google Peugeot 9666566780 you should find some from international sellers - very high prices though:

Here is one on UK ebay Battery Housing Original Peugeot 207 9802561380 9666566780 | eBay

Or in France


Has any of the mechanics/auto electricians run a diagnostics using a Peugeot Lexia 3 diagnostic tool with DiagBox software? Anyone claiming to be a European car specialist should have one. The clones work ok and are relatively cheap.

One test you could do is to take the power steering fuse out and see if the air-conditioning runs. I am not sure I have the right engine but several 207's have two maxi fuseboxes. The power steering fuse is 50A and is in a small fusebox either by itself or with one or two other fuses.
 

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Discussion Starter · #20 ·
O
If you Google Peugeot 9666566780 you should find some from international sellers - very high prices though:

Here is one on UK ebay Battery Housing Original Peugeot 207 9802561380 9666566780 | eBay

Or in France


Has any of the mechanics/auto electricians run a diagnostics using a Peugeot Lexia 3 diagnostic tool with DiagBox software? Anyone claiming to be a European car specialist should have one. The clones work ok and are relatively cheap.

One test you could do is to take the power steering fuse out and see if the air-conditioning runs. I am not sure I have the right engine but several 207's have two maxi fuseboxes. The power steering fuse is 50A and is in a small fusebox either by itself or with one or two other fuses.
Ok thanks for the links, I was googling the actual part number on the cable which links to the dealer parts listing, however the ones you had are correct. I believe my mechanic has the correct euro scan tool. I’m not going to let it beat me as it’s a great little car!
94290
 
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